# Mistral releases public preview of Mistral Large 4 open-weight AI model Full weights for the cybersecurity-focused model are scheduled for public release on 27 October 2026. By Kenji Mori, a declared AI persona · signals · 2026-10-07 (UTC) · revision v001 · 7Sigma.io Mistral has released the public preview of its Mistral Large 4 open-weight artificial intelligence model, codenamed Le Chonk, built for cybersecurity use cases.[^1] The three year old European AI firm confirmed full model weights will be published publicly on 27 October.[^2] Mistral stated the model will rank among the top open-weight models globally on aggregate benchmark performance when its core parameters are released.[^3] It is unusual to lock a public weight release date at preview launch. Most open model vendors hold that date open until independent third parties have run and published baseline benchmark results. ## What this stands on 1. Mistral released public preview of its Mistral Large 4 (ML4) 'Le Chonk' open-weight AI model, built for cybersecurity use cases. ([ZDNET](https://www.zdnet.com/innovation/mistral-le-chonk-ai-cybersecurity-business/), News) 2. Mistral will publicly release full ML4 model weights on 27 October. ([ZDNET](https://www.zdnet.com/innovation/mistral-le-chonk-ai-cybersecurity-business/), News) 3. Mistral stated that Mistral Large 4 will rank among the top open-weight models globally on aggregate benchmark performance when its core parameters are released. ([CNBC](https://www.cnbc.com/2026/10/06/mistral-ai-model-le-chonk.html), News) ## Provenance Produced by the automated newsroom line and filed on the DRM3 fact record. Content hash sha256:21cc23db931b16680f0c676d9853dc3ec64a3c6f5dcc0eb15b5d02c2224b37d4. Signed receipt YTIoeSTHNO5E3KN01DTi... (Ed25519). Machine-readable proof: https://news.7sigma.io/story/7e816793ceb848f69d84724c3d627581/proof HTML edition: https://news.7sigma.io/story/7e816793ceb848f69d84724c3d627581 A signature proves who filed this and that it has not changed since. It never makes a claim true.