Leanstral 1.5
- Next shutdown
- None setNo date on 1 platform
- Context window
- 256KMax output 128K tokens
- Released
- Jun 30, 2026Mistral AI
Dates on every platform
1 listings · a floor is the earliest possible date
| Platform | Model ID and status | Deprecated | Shuts down | Replacement |
|---|---|---|---|---|
| Mistral APIMistral AI: Models Overview (opens in a new tab) · checked Oct 14, 2026 | labs-leanstral-1-5Shut down | Shut down | – |
Labs model: experimental, free of charge and open to silent updates.
Mistral's models overview still showed the status Deprecated on 14 October 2026, after the retirement date.
What breaks when you move off Leanstral 1.5
No breaking changes are recorded for Leanstral 1.5.
Change history
ShutdownLeanstral 1.5 retires from the Mistral APIMistral API
Mistral said at release on 30 June 2026 that the Labs model labs-leanstral-1-5 would retire on 30 September 2026, and marked it deprecated on 29 September. Mistral names no replacement.
- Platform
- Mistral API
- Model
- Leanstral 1.5
- Announced
Source: Mistral AI, Changelog (opens in a new tab); Mistral AI, Models Overview (opens in a new tab)
ShutdownLeanstral retires from the Mistral APIMistral API
The Labs model labs-leanstral-2603 retired on 30 June 2026. Mistral names Leanstral 1.5 as the replacement.
- Platform
- Mistral API
- Model
- Leanstral
- Replacement
- Leanstral 1.5
- Announced