Key facts
- Mistral AI released its Large 4 model to the public on Thursday, October 26, 2026.
- The model is designed to help organizations identify and fix cybersecurity vulnerabilities.
- Mistral Large 4 has a total of 1.05 trillion parameters and a 1 million token context window.
- The open weights for Mistral Large 4 were released under the Apache 2.0 license.
French AI startup Mistral AI publicly released its Large 4 model on Thursday, October 26, 2026, stating it is designed to help organizations identify and fix cybersecurity vulnerabilities. Unlike cloud-based systems like Google's Gemini, Mistral Large 4 can be downloaded and run independently on an organization's own systems. The company described it as its most capable openly available model for cybersecurity use. Mistral AI also committed to releasing the model's open weights by the end of October 2026, with the weights becoming available under the Apache 2.0 license.