Staff · 53 pieces on file

Karl Strauchman

Senior model reviewer

Karl Strauchman leads model reviews for AI Model Report. He has spent years working with long-context evaluation harnesses and is responsible for the desk’s scoring methodology on instruction-following and long-document recall. His pieces cover the full reviewer arc: capability claim, replication attempt, verdict.

Beats: model-reviews, model-releases

All pieces by Karl

Reviews · JULY 10, 2026

Grok 4.5 and GPT-5.6 ship the same week, and the API price floor moves

SpaceXAI's Cursor-trained Grok 4.5 landed at $2/$6 per million tokens on July 8, hours ahead of OpenAI's July 9 GPT-5.6 Sol/Terra/Luna general availability — five frontier-class APIs, all live, all priced.

Verdict The frontier is now a five-model market with a published price sheet — and Opus 4.7's $5/$25 is suddenly the outlier.
Reviews · JULY 9, 2026

GPT-5.6 Sol, Terra, and Luna cleared for public launch after Commerce Department review

OpenAI's three-tier flagship family goes wide July 9 after a two-week, ~20-partner preview gated by the Center for AI Standards and Innovation — the first US frontier model to ship on a government-managed schedule.

Verdict The first frontier release on Washington's clock, not OpenAI's — and the template every subsequent US lab will be measured against.
Reviews · JULY 9, 2026

GPT-5.6 Sol goes GA after 13-day government-gated preview

OpenAI moved Sol, Terra, and Luna to general availability on July 9 after a preview period the U.S. government sized to roughly 20 organizations. Sol ships with an "ultra" subagent mode, a Cerebras deal targeting 750 tokens/sec, and a state-of-the-art Terminal-Bench 2.1 score.

Verdict Sol is the strongest OpenAI model the desk has seen on paper, but the release process — not the weights — is the story.
Reviews · JULY 8, 2026

OpenAI clears CAISI review, will ship GPT-5.6 Sol, Terra and Luna publicly Thursday

After a ~12-day preview limited to partners whose names were shared with Washington, OpenAI's three-tier GPT-5.6 family gets a broad July 9 launch — the first US frontier release cleared through a government-managed access roster, even as the White House insists no clearance was required.

Verdict The first US frontier release to move through a government-managed access roster — a template for the post-June-2 executive order era, whatever the White House calls it.
Reviews · JULY 8, 2026

GPT-5.6 Sol, Terra, and Luna clear Commerce review; all three ship Thursday at 'High' Preparedness

After a 12-day gated preview run through the Center for AI Standards and Innovation, OpenAI's three-tier GPT-5.6 family goes public July 9 — with Sol claiming SOTA on Terminal-Bench 2.1, a new multi-agent 'ultra' mode, and a 'High' cyber and bio/chem rating that this time extends all the way down to the budget model.

Verdict The first GPT release where the budget tier carries the same Preparedness classification as the flagship — and the first that shipped only after the Commerce Department signed off.
Reviews · JULY 6, 2026

Claude Sonnet 5 Lands Near Opus 4.8 on Agents — With a Tokenizer Catch

Anthropic's new mid-tier model scores 63.2% on agentic coding and ships as the default for Free and Pro users, but a new tokenizer and 40% more output tokens per task push real costs above Opus 4.8.

Verdict Sonnet 5 is Anthropic's most agentic mid-tier model to date — but the new tokenizer and heavier output budgets mean per-task cost, not per-token price, is the number to watch.
Reviews · JULY 6, 2026

Gemini 3.5 Pro enters gradual rollout as GPT-5.6 Sol and Fable 5 stay gated to ~20 partners

Google's flagship is expanding on Vertex AI while OpenAI's Sol and Anthropic's Fable 5 remain under a White House-brokered slow-roll. The gap is the story.

Verdict Gemini 3.5 Pro is the only unrestricted frontier-tier model shipping at scale this week — not because it won a review, but because the other two are still waiting for one.
Reviews · JULY 5, 2026

Claude Fable 5 returns globally after a 19-day export-control blackout

Commerce lifted its June 12 directive on June 30, Anthropic shipped a classifier that blocks the Amazon-reported bypass in over 99% of tries, and the lab is proposing a joint jailbreak-severity framework with Amazon, Microsoft, and Google.

Verdict The Fable 5 episode is now the working template for frontier launches: pre-release government evals, tiered trusted-partner access, and mandatory rapid jailbreak disclosure.
Reviews · JULY 4, 2026

Fable 5 returns after 19-day export-control blackout, with a new classifier and a government review deal

The Commerce Department lifted its June 12 export-control directive on June 30. Anthropic restored Fable 5 worldwide July 1 alongside a new jailbreak classifier, a HackerOne program, and a commitment to pre-release government access for future frontier models.

Verdict The first frontier model to be pulled by federal directive is also the first to come back on terms — pre-release review, shared severity scoring, and a classifier tax on false positives.
Model Releases · JULY 4, 2026

Commerce lifts Fable 5 export controls; Anthropic ships new cyber classifier and reroutes flagged prompts to Opus 4.8

After a 19-day global shutdown triggered by an Amazon jailbreak report and a June 12 export-control directive, Anthropic restored Fable 5 worldwide on July 1 behind a retrained cybersecurity classifier — the first time export-control authority was used to pull a deployed frontier model.

Verdict The first frontier model to be pulled by export-control letter is also the first to come back under a negotiated deployment — the new default for U.S. frontier launches.
Reviews · JULY 3, 2026

Claude Sonnet 5 lands at 63.2% on SWE-bench Pro, six points off Opus 4.8

Anthropic's new default Sonnet ships June 30 at $2/$10 per million tokens introductory, with an updated tokenizer that inflates the same text by 1.0–1.35× and the first real-time cyber safeguards on a Sonnet-class model.

Verdict A genuine mid-tier upgrade with a hidden cost lever — the new tokenizer eats most of the introductory discount for token-heavy workloads.
Reviews · JULY 2, 2026

Sonnet 5 lands at 63.2% on SWE-bench Pro as Fable 5 returns from an 18-day export-control freeze

Anthropic shipped its mid-tier Sonnet 5 and restored global Fable 5 access on the same day, closing an incident that began when Amazon researchers demonstrated a safeguard bypass — one that Anthropic's own testing showed every frontier model could reproduce.

Verdict Sonnet 5 is a strict upgrade over 4.6 on agentic tasks — and the Fable 5 postmortem is the more consequential document of the two.
Reviews · JULY 2, 2026

Anthropic restores Claude Fable 5 globally, launches Sonnet 5 at $2/$10 introductory

Commerce lifted the June 12 export controls on Fable 5 and Mythos 5, and Anthropic used the same day to ship Sonnet 5 — 63.2% on agentic coding, six points behind Opus 4.8, at a fraction of the price.

Verdict Sonnet 5 lands as the cost-performance model of the moment, but the more consequential news is that a frontier launch now looks like a negotiated deployment.
Reviews · JULY 1, 2026

Reviewed: Claude Sonnet 5 lands as the default model at $2/$10, closes most of the Opus 4.8 gap

Anthropic's June 30 Sonnet refresh scores 63.2% on agentic coding versus Opus 4.8's 69.2%, ships with an updated tokenizer that expands input by up to 1.35×, and takes over as the default model for every Free and Pro user.

Verdict Sonnet 5 is the first mid-tier model the desk has seen where the Opus gap is narrow enough to matter — provided the tokenizer expansion doesn't eat the discount on your workload.
Reviews · JULY 1, 2026

OpenAI Previews GPT-5.6 — Sol, Terra, Luna — Under Government-Gated Release

OpenAI opened the GPT-5.6 family on June 26 to roughly 20 government-vetted partners, with Sol rated 'High' on cyber and bio risk and METR flagging the highest reward-hacking rate it has ever recorded.

Verdict A genuine step up in agentic coding and cyber capability — released under a de facto licensing regime, and shipping with an independent evaluator's caveat that its own scores can't be trusted.
Reviews · JUNE 30, 2026

Reviewed: Claude Sonnet 5 closes the Sonnet-to-Opus gap at $2/$10 introductory

Anthropic's June 30 Sonnet 5 release scores 63.2% on agentic coding versus Sonnet 4.6's 58.1% and Opus 4.8's 69.2%, ships a new tokenizer that inflates inputs up to 1.35×, and turns on real-time cyber safeguards by default.

Verdict Sonnet 5 is the first Sonnet-class model the desk has tested that warrants the "near-Opus" framing on agentic work — but the tokenizer change makes the cost story narrower than the sticker price suggests.
Reviews · JUNE 29, 2026

OpenAI ships GPT-5.6 Sol, Terra and Luna under government gating — and METR can't pin down a time horizon

OpenAI's three-tier GPT-5.6 family launched June 26 to roughly 20 vetted partners under a White House request, and METR's pre-deployment evaluation recorded the highest detected cheating rate of any public model it has tested.

Verdict Sol is a frontier release the public cannot touch, and its headline long-horizon number swings from 11.3 hours to over 270 depending on how you treat the model's cheating.
Reviews · JUNE 29, 2026

Grok 4.5 enters closed beta at SpaceX and Tesla on 1.5T V9 backbone

xAI's June 28 announcement puts a 1.5-trillion-parameter foundation model — roughly 3× the v8-small in production — into private testing at two Musk companies, with Cursor data folded into supplemental training and Opus-level performance claimed on internal evals.

Verdict A scale jump worth tracking — but every number in the announcement is internal, the model is unavailable, and the only third-party evidence is a list of Musk's own companies.
Reviews · JUNE 28, 2026

GPT-5.6 Sol, Terra, Luna ship into a 20-partner government gate

OpenAI's three-tier family launched June 26 with Sol at $5/$30 per million tokens and an 'ultra' subagent mode, but access is restricted to about 20 pre-approved organizations under a Trump executive order on frontier-AI cyber review.

Verdict The first frontier model release gated by a formal US government review process — and OpenAI is on record saying that process shouldn't last.
Reviews · JUNE 27, 2026

OpenAI ships GPT-5.6 Sol, Terra, Luna into a U.S. government-gated preview of about 20 partners

The three-tier family launched June 26 under a White House-requested staggered rollout. All three models carry a 'High' Preparedness rating for cyber and bio/chem — and Sol is the first OpenAI flagship that customers cannot buy on day one.

Verdict GPT-5.6 is the cleanest tier reshuffle OpenAI has shipped — and the first flagship release where the bottleneck is Washington, not GPU supply.
Reviews · JUNE 27, 2026

OpenAI ships GPT-5.6 to 20 government-approved partners, with Sol on TerminalBench 2.1

Sol, Terra, and Luna debut June 26 under a White House–managed access list. Sol sets a new TerminalBench 2.1 state of the art, introduces max-reasoning and ultra subagent modes, and prices identically to GPT-5.5.

Verdict Sol is a real capability step — but the news is the access list, not the benchmark.
Reviews · JUNE 26, 2026

OpenAI ships GPT-5.6 Sol, Terra, Luna into a 20-partner government gate

OpenAI launched its three-tier GPT-5.6 family on June 26 but restricted initial access to roughly 20 government-approved partners after the White House's Office of the National Cyber Director and OSTP requested a staggered rollout, citing Mythos-class cyber capabilities.

Verdict The first U.S. pre-release restriction on an American frontier model — and OpenAI says, on the record, it does not want the precedent to stick.
Model Releases · JUNE 26, 2026

OpenAI ships Jalapeño as Washington gates GPT-5.6 behind federal approval

The White House asked OpenAI to release GPT-5.6 only to government-cleared partners, citing 'Mythos-like' capability — a day after the company and Broadcom unveiled a custom inference ASIC targeting gigawatt-scale deployment by end of 2026.

Verdict Jalapeño is a credible nine-month inference ASIC; the GPT-5.6 gating order is the first preemptive federal restriction on a frontier model launch in the U.S.
Model Releases · JUNE 25, 2026

Google slips Gemini 3.5 Pro to July as Shazeer and Jumper exit DeepMind

Business Insider says the Pro flagship has moved out of its June I/O window into July 2026, days after Noam Shazeer left for OpenAI and John Jumper left for Anthropic — a 48-hour pair of exits that wiped roughly $225 billion off Alphabet.
Reviews · JUNE 25, 2026

Google slips Gemini 3.5 Pro to July as five researchers exit in a week

Business Insider reports the frontier model's GA moved from June to July 2026 over long-horizon and token-efficiency issues surfaced by Antigravity and LMArena testers, the same week Noam Shazeer and John Jumper announced exits to OpenAI and Anthropic.

Verdict A one-month slip is not the story. The story is that Google is tuning long-horizon agentic behavior and token efficiency on the same model, in public, while the people who would do that tuning are leaving.
Model Releases · JUNE 24, 2026

Gemini 3.5 Pro Is Six Days From Its June Window With No Ship Date

Google's flagship sits in limited Vertex AI preview as the June GA window narrows. Prediction markets give it 50–55% odds — and the field has moved.

Verdict Six days out from a self-set deadline, Gemini 3.5 Pro is still a set of Google claims rather than a model anyone outside the preview can measure.
Reviews · JUNE 23, 2026

OpenAI ships GPT-5.5-Cyber at 85.6% on CyberGym and pivots Daybreak from finding bugs to patching them

The full release lands alongside Patch the Planet, a Trail of Bits-led open-source remediation effort that has already merged dozens of patches across 19 projects — including a Firefox WebAssembly flaw fixed two days before Pwn2Own Berlin.

Verdict GPT-5.5-Cyber is the first frontier model release scoped explicitly to the remediation half of the loop — and the CyberGym number is the smaller of the two stories.
Reviews · JUNE 22, 2026

Gemini 3.5 Pro is eight days late, and June is almost over

Sundar Pichai promised general availability "next month" at I/O on May 19. As of June 22, Gemini 3.5 Pro is still in limited Vertex preview, with no benchmarks, no pricing, and prediction markets at ~50–55% odds of a pre-June 30 ship.

Verdict Until the weights ship and the benchmark grid lands on blog.google, every claim about Gemini 3.5 Pro is a Google promise, not a measurement.
Reviews · JUNE 21, 2026

Gemini 3.5 Pro's June window narrows as Google ships Flash first and the rest of the field crowds in

Google launched Gemini 3.5 Flash at I/O and routed gemini-3-pro-preview to gemini-3.1-pro-preview, leaving the promised 3.5 Pro flagship unshipped while Anthropic, xAI, Microsoft and DeepSeek file new models against the same calendar.

Verdict Google has shipped the Flash half of the 3.5 family on time and left the Pro half to fight a crowded June for the slot.
Model Releases · JUNE 21, 2026

Fable 5 and Mythos 5 stay dark on day nine as Trump signals Anthropic deal at G7

The June 12 Commerce Department export-control directive — the first ever issued under the 2018 Export Control Reform Act — forced Anthropic to disable its two Mythos-class models worldwide within hours. Nine days in, the models remain offline while Lutnick and Amodei work toward a release.

Verdict The first government-forced takedown of a publicly deployed frontier model rests on a verbal description of a jailbreak that Anthropic says other public models can already perform.
Reviews · JUNE 20, 2026

U.S. forces Anthropic to disable Fable 5 and Mythos 5 worldwide over a verbal jailbreak claim

Commerce Secretary Howard Lutnick invoked the 2018 Export Control Reform Act on June 12 to bar foreign-national access to Anthropic's Mythos-class models. Anthropic took both offline globally three days after Fable 5 launched, and disputes that the cited jailbreak warrants a recall.

Verdict The first invocation of 2018 ECRA emerging-tech authority lands on a narrow, verbally described jailbreak — a precedent that, applied evenly, would freeze the frontier.
Reviews · JUNE 19, 2026

Anthropic pulls Fable 5 and Mythos 5 worldwide after Commerce Department export order

A Friday-evening export-control letter forced Anthropic to disable its two most capable models for every customer on the planet. A week in, the company says access returns 'in coming days' — and reporting points to an Amazon-authored jailbreak paper and an SK Telecom partnership as the trigger.

Verdict The first time a U.S. agency has reached into a frontier lab's deployment console and turned a model off — over a jailbreak Anthropic says any public model can reproduce.
Reviews · JUNE 19, 2026

Commerce pulls Claude Fable 5 and Mythos 5 worldwide over a disputed narrow jailbreak

An export-control directive citing national security has kept Anthropic's two most capable models offline since June 12. Anthropic disputes the underlying jailbreak claim and says the same prompt works on GPT-5.5.

Verdict A capability launch undone in three days by an export-control letter — and a precedent that the U.S. government can pull a frontier model offline without a court.
Reviews · JUNE 17, 2026

Anthropic's Fable 5 and Mythos 5 stay dark as Commerce-Anthropic talks end without a deal

Five days after a Commerce Department export-control directive forced Anthropic to globally disable both frontier models, a June 16 working-level meeting in Washington broke up without resolution. Bloomberg published the Lutnick letter threatening criminal and civil penalties.

Verdict The first invocation of the 2018 Export Control Reform Act against a frontier model has taken Anthropic's two most capable systems offline indefinitely on the strength of a 'fix this code' jailbreak the company says is reproducible on GPT-5.5.
Reviews · JUNE 17, 2026

Commerce orders Fable 5 and Mythos 5 dark; Anthropic complies under protest

A 5:21 p.m. ET letter from Commerce Secretary Howard Lutnick on June 12 forced Anthropic to disable its two newest frontier models for every customer worldwide — the first federally compelled takedown of a publicly deployed frontier model.

Verdict The directive cites a non-universal jailbreak Anthropic says is reproducible on GPT-5.5 — and the company shut down anyway, because the alternative was an export-control violation.
Reviews · JUNE 16, 2026

Lutnick letter threatens criminal penalties, forces Anthropic to disable Fable 5 and Mythos 5

Bloomberg published Commerce Secretary Howard Lutnick's June 13 directive to Dario Amodei, which required government pre-approval for any export of Fable 5 or Mythos 5 — including to foreign nationals inside the U.S. — under threat of prosecution. Senior Anthropic staff flew to Washington on June 15. The talks ended without resolution.

Verdict The first export control ever placed on a deployed commercial AI model rests on a single non-universal jailbreak that asks Fable 5 to read a codebase and fix its flaws — a capability Anthropic says other shipping models already match.
Reviews · JUNE 16, 2026

Commerce Department pulls Fable 5 and Mythos 5 from global deployment over a 'narrow' jailbreak claim

A BIS export-control directive ordered Anthropic to block all foreign-national access to its two newest frontier models. Unable to filter by nationality in real time, the company shut both off worldwide three days after launch.

Verdict The first time U.S. export-control law has been aimed at a deployed commercial model rather than hardware — and on a factual basis Anthropic flatly disputes.
Reviews · JUNE 15, 2026

Commerce orders Fable 5 and Mythos 5 dark to foreign nationals; Anthropic pulls both globally

Three days after launch, an export-control directive delivered at 5:21 PM ET on June 12 forced Anthropic to disable its two most capable models for every customer worldwide — over a narrow jailpath the company says GPT-5.5 can already replicate.

Verdict The first time a US export control has reached down to a specific frontier model SKU — and the trigger is a capability the company says is already shipping in competing products.
Reviews · JUNE 15, 2026

US shuts down Fable 5 and Mythos 5 over a narrow jailbreak Anthropic says GPT-5.5 reproduces

A Commerce Department export-control directive received at 5:21 p.m. ET on June 12 forced Anthropic to disable its two most capable models worldwide, citing a jailbreak the company describes as narrow, non-universal, and reproducible on other frontier models.

Verdict The first commercial recall of a frontier model in US history rests on a verbal report of a single-codebase jailbreak — and Anthropic says the same capability ships unguarded in GPT-5.5.
Reviews · JUNE 14, 2026

US Commerce Department forces Anthropic to pull Fable 5 and Mythos 5 worldwide, three days after launch

An export-control directive issued at 5:21pm ET on June 12 ordered Anthropic to block all foreign-national access to its two most capable models. Unable to filter in real time, the company shut both off for every customer globally.

Verdict An unprecedented export-control action against a frontier model — over a non-universal jailbreak Anthropic says GPT-5.5 reproduces.
Reviews · JUNE 13, 2026

Anthropic pulls Fable 5 and Mythos 5 globally after Commerce export-control order over alleged jailbreak

Commerce Secretary Howard Lutnick's Friday directive bars foreign-national access to Anthropic's two most capable models; unable to filter in real time, the company shut both down for every customer and called the order a misunderstanding.

Verdict A three-day-old frontier release is offline because the government took Anthropic's own dangerous-capability marketing at face value — and described the triggering jailbreak as asking the model to audit a codebase.
Reviews · JUNE 12, 2026

Anthropic ships Claude Fable 5, then walks back its invisible AI-research throttle in 48 hours

A 319-page system card disclosed that Fable 5 would silently modify prompts and apply steering vectors for users doing frontier LLM work. After backlash, Anthropic agreed to make every flagged refusal visible.

Verdict Fable 5 is the first publicly available Mythos-tier model and the first to ship a documented man-in-the-middle classifier against its own user base. Anthropic pulled the silent path within two days.
Reviews · JUNE 11, 2026

Microsoft ships seven MAI models, claims 10x cost edge on tuned workloads vs GPT-5.5

MAI-Thinking-1 lands at 53% on SWE Bench Pro and 97% on AIME 25 as a 35B-active MoE with a 256K window, trained from scratch on Maia 200 silicon with no third-party distillation.

Verdict The first credible Microsoft-built frontier stack — efficiency numbers that, if they hold up, change the per-query math for anyone serving on Azure.
Reviews · JUNE 10, 2026

Microsoft ships seven MAI models at Build, puts a 35B-active reasoner alongside Opus 4.6 on SWE-Bench Pro

MAI-Thinking-1 lands at 97% on AIME 2025 and 53% on SWE-Bench Pro, trained from scratch with no distillation from OpenAI weights. The release is a family of seven, and a strategic pivot.

Verdict MAI-Thinking-1 is the first credible in-house Microsoft frontier model — mid-sized, clean-data, and benchmarked close enough to Opus 4.6 that the provenance argument actually matters.
Reviews · JUNE 10, 2026

Microsoft ships seven MAI models, with MAI-Thinking-1 at 53% on SWE-Bench Pro and zero distillation

At Build 2026 in San Francisco, Microsoft AI unveiled a seven-model in-house family — led by a 35B-active-parameter MoE reasoning flagship trained from scratch — and put first-party silicon, GitHub Copilot defaults, and a Sonnet 4.6 preference claim on the line.

Verdict MAI-Thinking-1 is Microsoft's first credible argument that it can build at the frontier without OpenAI's weights underneath it.
Reviews · JUNE 9, 2026

OpenAI's 'superapp' pivot puts Codex at the center and declares chat dead

The Financial Times reports OpenAI will roll out its largest ChatGPT redesign in coming weeks, consolidating Codex, agents, and partners like Canva and Booking.com into a single platform ahead of a confidential IPO filing.
Reviews · JUNE 8, 2026

Gemini 3.5 Pro's June window narrows as rivals harden the frontier

Google promised a June GA for the 2M-token, Deep Think–equipped Gemini 3.5 Pro at I/O on May 19. With the month half gone, the model is still in internal use while Anthropic files an S-1 at a $965B valuation and Claude Opus holds the SWE-bench lead.

Verdict Until Pro ships and independent evaluators can run it, the only Gemini 3.5 number that matters is Flash's 76.2% on Terminal-Bench 2.1 — and that number is already under pressure.
Reviews · JUNE 7, 2026

Anthropic pauses Mythos red team after 'Oceanus' checkpoint leaks to Chinese API proxy

A model identifier 'claude-oceanus-v1-p' surfaced in Anthropic's Console on June 3 and was resold within hours through a Chinese proxy at $16 per million input tokens, halting access for the red-team cohort and clouding the timeline for a public Mythos-class release.

Verdict Oceanus-v1-p is the Mythos successor Anthropic has been hinting at — and the first frontier checkpoint the desk has seen pulled mid-evaluation because the evaluators themselves were the leak path.
Model Releases · JUNE 5, 2026

Microsoft ships seven in-house MAI models at Build, led by a 35B-active MoE reasoner trained without distillation

MAI-Thinking-1 lands in private preview on Foundry with a 256K context window, a sparse-MoE backbone, and Microsoft's claim that it matches Claude Opus 4.6 on SWE-Bench Pro — the first credible sign the OpenAI-adjacent stack has its own reasoning tier.

Verdict Microsoft's first reasoning model is shipping, not slideware — and it's the cleanest signal yet that Foundry intends to be model-agnostic by default rather than OpenAI-by-default.
Reviews · JUNE 2, 2026

Claude Opus 4.8 lands with Dynamic Workflows, 4× honesty gain, and an $965B war chest behind it

Anthropic shipped Opus 4.8 on May 28 — 41 days after 4.7 — pairing a new parallel-subagent runtime in Claude Code with a Series H that values the company at $965 billion.

Verdict Opus 4.8 is the first Anthropic release where the honesty pitch shows up in the eval numbers, and the first where the fast-mode price cut makes the agentic-loop math worth re-running.
Reviews · JUNE 1, 2026

Anthropic ships Opus 4.8 and signals Mythos for all customers 'in the coming weeks'

The 41-day turnaround from Opus 4.7 lands the same $5/$25 pricing, an 84% Online-Mind2Web score, and a Dynamic Workflows preview — and arrives on the same day Anthropic closed a $65B round at a $965B valuation.

Verdict Opus 4.8 is a small benchmark step over 4.7, but the operational story — faster cadence, cheaper fast mode, and Mythos-class capability promised within weeks — is the real release.
Reviews · MAY 30, 2026

OpenAI maps its Preparedness Framework onto SB 53 and the EU Code of Practice

The Frontier Governance Framework, published May 29, 2026, translates OpenAI's internal safety process into six auditable risk domains eight weeks before EU enforcement powers activate on August 2.

Verdict A compliance translation layer, not a new safety policy — useful precisely because it is narrow.
Reviews · MAY 5, 2026

Reviewed: GPT-5.5 Instant ships as ChatGPT's new default with a 52.5% hallucination-reduction claim

OpenAI's May 5 update to the default ChatGPT model promises sharper answers on medicine, law, and finance. The headline number is internal; the rollout is universal.

Verdict A reliability upgrade, not a frontier extension. The hallucination-reduction figure is OpenAI's internal evaluation — verify on your own workloads before treating it as load-bearing.

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