# Leanstral 1.5’s hosted preview is scheduled to retire.

Mistral AI · Mistral API · hosted public preview
AI-Buzz documentation reading: 2026-09-09

## Affected dependencies
- labs-leanstral-1-5

Scheduled shutdown: 2026-09-30
Announcement date: unknown

## Vendor documentation
Mistral’s June 30 release entry states that labs-leanstral-1-5 will retire on September 30, 2026. The entry names no successor.

## Suggested checks
- [ ] Locate labs-leanstral-1-5 in API configuration and request logs.
- [ ] Separate hosted calls from any locally deployed model; this notice alone does not establish a local migration requirement.
- [ ] For hosted use, confirm a supported destination with Mistral and test your proof or coding workflow before changing configuration.

## Limits
The original retirement-announcement date is unknown. A dated, mutable release entry does not show when retirement wording was added. No inference about weight licensing follows from this API notice.

This is a dated documentation reading, not a live availability check. Recheck the sources before acting.

## Sources
- [Mistral API changelog](https://docs.mistral.ai/resources/changelogs) — June 30, 2026 Leanstral 1.5 entry
- [Leanstral 1.5 model documentation](https://docs.mistral.ai/models/leanstral-1-5) — Hosted public preview, release date and model availability

Brief: https://ai-buzz.com/briefs/mistral-leanstral-preview-retirement/