The facts
The company describes Large 4 as a trillion-parameter multimodal model. It says the released weights improve on the preview version announced earlier in October. [1][2]
Weights are available through Hugging Face for self-hosting; Mistral also offers hosted access through its own platform. [1]
The Mistral Ecosystem Open-Weight license is a modified MIT license. It permits use, modification and commercialization, but Model-as-a-Service businesses require a separate commercial license. [1]
Still unconfirmed
- The maker’s performance and cybersecurity claims have not been independently validated here.
Sources
References support the numbered facts above. Source checks: 29 Oct 2026, 19:03 UTC.
Reuters independently reports the release; model specifications and licensing come from Mistral. Downloadable weights are not described as an unrestricted open-source license.
- Large 4 open-weight release
Mistral AI · Primary source · 29 Oct 2026
- Mistral publicly releases Large 4
Reuters via Global Banking & Finance Review · Reporting · 29 Oct 2026
Read Leo Marchandon’s credited Reuters report within the host page. The host’s added summaries and commercial material are not independent technical evidence.