Mistral Launches 1T-Parameter Open-Weight Flagship Mistral Large 4 "Le Chonk"
Mistral officially announced its flagship open-weight model Mistral Large 4 (codename Le Chonk) on October 6: a MoE architecture with 1T total parameters and roughly 49B active parameters, natively multimodal. The API launched the same day, with open weights planned for late October.
Confirmed
- Specs: 1T total parameters, 49B active parameters, natively multimodal; its visual grounding capability is claimed to surpass closed-source models.
- Positioning: billed as the strongest open-weight model in the US and Europe on aggregate benchmarks, achieving SOTA on key workloads such as cybersecurity defense, manufacturing, and finance.
- Rollout: the API went live on launch day; open weights are slated for release in late October.
Unconfirmed
- @haider1 relayed community skepticism, noting gaps in the officially released benchmark data—actual performance awaits independent evaluation.
Why it matters
- This is Mistral's largest open-weight flagship to date, and a 1T-parameter model is a landmark for the European open-source camp, seen as a move to rival top US open models.
- If its SOTA claims in cybersecurity and other critical industries hold up under third-party validation, it could reshape enterprise model selection.
2026-10-06 ~ 2026-10-06 · 41 related posts
- Episode 1: Mistral Launches 1T-Parameter Open-Weight Flagship Mistral Large 4 "Le Chonk"(2026-10-06, 41 posts)
- Episode 2: Mistral Large 4 Still in RL Training, Expected by Month's End(2026-10-06, 3 posts)
- Episode 3: Mistral Large 4 Review: France Rises to Third in Frontier AI Rankings(2026-10-06, 5 posts)
- Episode 4: Mistral Large 4.0 Surfaces on Hugging Face, Weights to Open-Source This Month(2026-10-06, 3 posts)
Primary sources
- Mistral launches Le Chonk: 1T-parameter multimodal model, open weights due end of October — MistralAI ·
- Mistral ML4 Human Eval Beats GLM 5.3 on STEM, CAD, Finance; Ties on Agentic Coding — GuillaumeLample ·
- Mistral Large 4 leaked on Hugging Face: 1T total / 52B active params, open-source this month — victormustar ·
- Mistral launches 1T-parameter MoE model Large 4, claims best open-weights model in US/Europe — Bam4d · 2026-10-06
- [source] Mistral launches Le Chonk: 1T-parameter multimodal model, open weights due end of October — MistralAI · 2026-10-06
- Mistral Ships Large 4, and the Community Has Already Nicknamed It 'Le Chonk' — cpldcpu · 2026-10-06
- Mistral Large 4 Preview Benchmarks Just Dropped — Informal-Trouble2183 · 2026-10-06
- Mistral launches 1T-param Mistral Large 4; users question its benchmark claims — haider1 · 2026-10-06
- Mistral's ML4 Hits Open-Weight SOTA on Security, Scores 82% on Vulnerability Patching — GuillaumeLample · 2026-10-06
- Mistral ML4 Benchmarks: SOTA on Finance and Legal Workflows, Terminal and Spreadsheet Navigation — GuillaumeLample · 2026-10-06
- [source] Mistral ML4 Human Eval Beats GLM 5.3 on STEM, CAD, Finance; Ties on Agentic Coding — GuillaumeLample · 2026-10-06
- Mistral ships 1T-parameter open-weight ML4, beating GLM 5.3 on human eval, hiring worldwide — GuillaumeLample · 2026-10-06
- Mistral releases 1T-parameter 'Le Chonk', claims best open-weight model outside China — nordicinst · 2026-10-06
- [source] Mistral Large 4 leaked on Hugging Face: 1T total / 52B active params, open-source this month — victormustar · 2026-10-06
- Mistral's Sophia Yang: new model beats GLM 5.3 on human evals across domains — sophiamyang · 2026-10-06
- Mistral launches Mistral Large 4 (Preview) — Few_Painter_5588 · 2026-10-06
- Mistral to open-source LeChonk-1T-A49B, weights due end of month — wapswaps · 2026-10-06
- Mistral officially launches Mistral Large 4 in Research Public Preview — MistralAI · 2026-10-06
- Mistral Large 4 debuts: 1.05T parameters with 49B active, weights out October 27 — 赛博禅心 · 2026-10-06
- Mistral releases Large 4 preview: the only Western OSS LLM competitive with Chinese open models on coding — b_roziere · 2026-10-06
- Mistral Large 4 claims wins over GLM 5.3 on DeepSWE and Kimi k3 on Tbench 4 — b_roziere · 2026-10-06
- Mistral Large 4 preview: 1T-param MoE with 49B active, beats GPT-6 Astra on visual grounding — testingcatalog · 2026-10-06
- Mistral announces 1T-parameter Mistral Large 4 'Le Chonk', API live, open weights this month — kyliebytes · 2026-10-06
- Mistral Large 4 preview: 1T params, 49B active, trained on 3,800 Grace Blackwell GPUs — petrusenko_max · 2026-10-06
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