Mistral releases Mistral Large 4 ("le Chonk"): 1T-parameter open-weight MoE, 1M context, public preview
On Oct 6, 2026 Mistral AI released Mistral Large 4, a granular mixture-of-experts model with ~1.05T total and 49B active parameters, a 1M-token context window and vision, in public preview on Mistral Studio; open weights are promised by the end of October 2026. It is Europe's largest open-weight model and Mistral claims frontier-level cybersecurity and agentic scores.
Key facts
- Architecture: granular MoE, 49B active / 1.05T total parameters, 1.6B vision encoder (docs)
- Context window: 1M tokens (docs); API id mistral-large-4-0 / mistral-large-4
- Trained on 3,800 NVIDIA Grace Blackwell GPUs in Mistral's European datacenters (blog; Techmeme/The Deep View said ~4,000)
- Availability: public preview via Mistral Studio from Oct 6; weights to be released by end of October 2026
- Pricing differs between sources: docs list $0.68 input / $0.07 cached / $2.09 output per 1M tokens; the blog lists $1.36 / $4.18 (docs figure may be a preview price - unverified)
- Mistral-reported benchmarks: Cybench 93%, DeepSWE v1.1 61.7%, Terminal Bench 4.0 28.3%, AutomationBench 59.9%, Dense 200 42% (vs GPT-6-Astra 41%); top 5 on the AA Cyber Index
- Hacker News: 627 points (docs page) and 325 points (blog) on launch day
What happened
Mistral AI launched Mistral Large 4, nicknamed "le Chonk", on October 6, 2026. It is a granular mixture-of-experts model with about 1.05 trillion total and 49 billion active parameters, a 1.6B vision encoder and a 1M-token context window. It launched as a public preview on Mistral Studio, and Mistral promises open weights by the end of October. Mistral pitches it for general agentic work and highlights its cybersecurity scores (Cybench 93%, top 5 on the Artificial Analysis Cyber Index). All benchmark numbers are self-reported.
The license for the weights and the final price are not yet confirmed: the docs and the blog list different prices.
Why it matters
It is the first trillion-parameter open-weight model from a European lab, and it is trained on European compute. It competes directly with Chinese open-weight frontier models.
Changelog
- 2026-10-06: created
Models
- Mistral Large 4 Mistral AI · preview
Sources (4)
- officialMistral AI: Mistral Large 4 "Le Chonk"
- docsMistral docs: Mistral Large 4 model card
- pressTechCrunch: Mistral's new 1T model aims to leapfrog closed and open rivals
- discussionHacker News discussion (627 pts)
id: 2026-10-06-mistral-large-4 · updated 2026-10-06 · open in the interactive timeline