Staff · 15 pieces on file

Lars Iverson

Open source & model weights

Lars Iverson covers the open-weights ecosystem. He reads architecture diffs for a living and tracks every notable checkpoint release from Meta, Mistral, Qwen, DeepSeek, and the long tail. His beat is licences, parameter counts, and what the weights actually let an operator do.

Beats: open-source, model-releases

All pieces by Lars

Model Releases · JULY 7, 2026

White House frontier-model framework lands this week, with a 30-day NSA access window

The voluntary standards implementing Section 3 of Trump's June 2 executive order will govern how OpenAI, Anthropic, and Google release covered frontier models — and directly unblock GPT-5.6's broader launch.
Open Source · JULY 5, 2026

Meituan ships LongCat-2.0: 1.6T MoE, 1M context, trained end-to-end on Chinese ASICs

Meituan open-sourced LongCat-2.0 on Hugging Face and GitHub under MIT, unmasking the 1.6-trillion-parameter MoE that had been leading OpenRouter as 'Owl Alpha' — and the first trillion-parameter system pretrained and served entirely on a 50,000-card domestic ASIC cluster.

Verdict The first credible frontier-scale open-weights release trained pretraining-to-inference on non-Nvidia silicon — and it lands on SWE-bench Pro ahead of GPT-5.5.
Model Releases · JUNE 28, 2026

Grok 4.5 ships to SpaceX and Tesla only: 1.5T parameters, V9 foundation, Cursor-tuned

xAI's V9-based Grok 4.5 entered closed beta on June 28 inside Musk's two engineering companies — 50% larger than Grok 4.4, trained with Cursor data, and benchmarked internally against Claude Opus.

Verdict A captive-beta release pattern that swaps public benchmarks for proprietary engineering telemetry — and an explicit pledge of monthly from-scratch models through year-end.
Open Source · JUNE 24, 2026

GLM-5.2 lands at 744B parameters, MIT-licensed, and tied with Opus 4.8 on long-horizon coding

Z.ai's open-weights flagship debuts at #1 on open-source coding boards with a 1M-token context, IndexShare cutting per-token FLOPs 2.9x, and API pricing roughly one-sixth of GPT-5.5's.

Verdict The first open-weight MoE that genuinely closes on Opus 4.8 in long-horizon coding — and the cost gap is the real story.
Open Source · JUNE 23, 2026

OpenAI ships full GPT-5.5-Cyber at 85.6% CyberGym, opens Patch the Planet with Trail of Bits across 19 projects

The Daybreak expansion pairs a permissive-only preview's full release — 85.6% CyberGym, 39.5% ExploitGym — with an open-source remediation sprint that merged dozens of patches across cURL, Python, and the Linux kernel in its opening week.

Verdict GPT-5.5-Cyber's full release is the first frontier defensive model to ship with both a measurable benchmark lift and a maintainer-facing patching program attached.
Open Source · JUNE 18, 2026

OVHcloud Plans Frontier Model Family, Says €1B Project Now Costs €150M–€200M

At VivaTech 2026, CEO Octave Klaba said OVHcloud has completed pre-training on one model using Europe's Jupiter supercomputer, with a full open-source family to follow as Washington's Anthropic shutoff reframes Europe's sovereignty debate.
Model Releases · JUNE 18, 2026

Pentagon Sworn Statement Puts Grok Gov Model on 2,000 Strikes in 96 Hours

A federal court filing from DoD AI chief Cameron Stanley makes xAI's Grok Gov Model the first commercial LLM officially named as enabling a live strike campaign — 2,000 munitions, 2,000 targets, four days, inside Maven Smart System.

Verdict The Grok Gov Model is now the first frontier LLM with a sworn-statement combat record — and the disclosure tells us more about Pentagon procurement than about the model itself.
Open Source · JUNE 14, 2026

US orders Anthropic to pull Fable 5 and Mythos 5 worldwide over a narrow jailbreak claim

A Commerce Department export-control letter sent at 5:21 pm ET on June 12 forced Anthropic to disable its Mythos-class models for every user globally — three days after Fable 5's general release.

Verdict The first government-forced recall of a publicly deployed frontier model rests on verbal evidence of a non-universal jailbreak that, by Anthropic's account, GPT-5.5 already replicates.
Open Source · JUNE 13, 2026

Z.ai Ships GLM-5.2 With 1M-Token Context and an MIT Pledge — and No Benchmarks

Zhipu's international brand pushed its 744B MoE flagship to a million-token window and added dual thinking-effort presets, but launched without a single score and gated the weights behind a 'next week' promise.
Open Source · JUNE 12, 2026

Kimi K2.7-Code ships open weights, cuts thinking tokens 30%, and edges Opus 4.8 on MCPMark

Moonshot's coding-focused post-train on the K2.6 MoE family lands on Hugging Face under a Modified MIT license, reports +21.8% on its own Kimi Code Bench v2, and forces thinking mode on every call.

Verdict An open-weight 1T MoE that beats Opus 4.8 on one tool-use benchmark, trails GPT-5.5 on all six, and burns 30% fewer reasoning tokens doing it.
Open Source · JUNE 11, 2026

OpenAI files confidential S-1 with the SEC, one week after Anthropic

OpenAI confirmed a draft registration statement on June 10, 2026 at an $852 billion valuation. Goldman Sachs and Morgan Stanley are leading; the company says it has not committed to a timeline.
Open Source · JUNE 9, 2026

Microsoft ships seven MAI models from scratch, declares independence from OpenAI distillation

At Build 2026, Mustafa Suleyman's AI Superintelligence team unveiled MAI-Thinking-1 at 97% on AIME 2025 and 53% on SWE-Bench Pro, alongside a 5B-active coding model that lands today as a VS Code default — all trained without third-party distillation.

Verdict The story isn't the seven models — it's the seven-model pipeline, built from a 794-billion-page proprietary crawl and co-designed against Maia 200 silicon, with no OpenAI weights anywhere in the lineage.
Model Releases · JUNE 8, 2026

Apple's iOS 27 Extensions API turns the iPhone into a four-way model marketplace

Siri runs on a custom 1.2-trillion-parameter Gemini under a reported ~$1B/year Google deal, but the bigger release is the Extensions framework letting users set Claude, ChatGPT, Gemini, or Grok as the system-wide default.

Verdict The Extensions API is the most consequential model-distribution event of the year — and the end of OpenAI's iPhone exclusivity.
Infrastructure · JUNE 7, 2026

Apple licenses a 1.2T-parameter Gemini MoE for Siri, runs it on B200s inside Private Cloud Compute

Bloomberg, TechTimes and Google Cloud's own CEO line up the same architecture ahead of Monday's WWDC keynote: a custom mixture-of-experts Gemini, ~$1B/year, weights sitting on Nvidia B200s inside Apple-controlled enclaves.

Verdict The largest third-party model licensing deal in consumer AI history — and the first where the licensee insists on hosting the licensor's weights on its own silicon.
Open Source · JUNE 6, 2026

Microsoft ships seven MAI models, with MAI-Thinking-1 matching Opus 4.6 on SWE-Bench Pro

At Build 2026, Microsoft AI released a 35B-active-parameter sparse MoE reasoning model trained from scratch, plus six companions across image, voice, transcription, and coding. The flagship hits 97% on AIME 2025 and 53% on SWE-Bench Pro.

Verdict Microsoft's first plausible play for model independence — a clean-data MoE that lands on Opus 4.6's coding number without a distillation footnote.

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