Devstral Small 1.1
Devstral Small 1.1 retains the 24B text-only design of Small 1.0. The update focuses on performance across coding environments and on more flexible tool-call formats.
Deprecated API; check access details
Changes without a larger architecture
The card describes improved behavior with prompts and coding environments beyond OpenHands. It also adds Mistral’s function-calling format. These changes distinguish the July checkpoint from Small 1.0 even though the model size and parent family remain the same.Devstral Small 1.1 official model card
Reproduce the whole tool workflow
The release supports both Mistral function calling and XML-based formats. A migration should keep the tool schema and parser consistent with the chosen format. A benchmark from one agent environment does not establish the same result with another.Devstral Medium 1.0 release announcement
Specifications & access
| Detail | Value and conditions |
|---|---|
| Status | Deprecated API; check access details |
| Launch date | |
| Access | API, Downloadable |
| Model identifiers | Devstral-Small-2507devstral-small-2507 |
| Context window | 128,000 tokens The model catalog advertises 128k context for this version. This is not a measured recall limit. Devstral Small 1.1 model and lifecycle record |
| Weight license | Apache 2.0Devstral Small 1.1 official model card |
| Access and lifecycle | Hosted API deprecated on 27 February 2026. Downloadable weights remain listed.Devstral Small 1.1 model and lifecycle recordDevstral Small 1.1 official model card |
| Parameters | 24 billionDevstral Small 1.1 official model card |