Mistral Medium 3.5 and Vibe remote agents
Mistral Medium 3.5, a 128B dense model with open weights, hits 77.6% SWE-Bench Verified and powers cloud-based Vibe remote coding agents.
One 128B dense multimodal model (256K context, configurable reasoning effort) replaces Devstral 2 in Vibe. Remote agents run sandboxed coding sessions in parallel, open pull requests and notify when done. Modified MIT license, API $1.50/$7.50 per million tokens.
- Date
- Tuesday, 28 April 2026
- Lab
- Mistral AI
- Kind
- open-weights
- Access
- open weights (restricted license)
- Price
- $1.50 in / $7.50 out per 1M tokens, 2026
Figures
| Measure | Value | Measured by |
|---|---|---|
| SWE-Bench Verified | 77.6% | company |
| tau3-Telecom | 91.4 | company |
Sources conflict on the date. Mistral's changelog and several outlets give 2026-04-28/29, while Mistral's own news post is dated 2026-05-22. Earlier date used. 'Modified MIT' means the weights are open with added terms.
Sources
- mistral.ai/news/vibe-remote-agents-mistral-medium-3-5/
- docs.mistral.ai/getting-started/changelog/
- opendatascience.com/mistral-launches-medium-3-5-and-cloud-based-remote-agents-for-async-co
This record was checked against its sources on 6 October 2026. How we check