Migrating off Mistral Medium 3.1 — retirement date and replacement
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Mistral is retiring Mistral Medium 3.1 on 2026-08-31. The provider’s documented replacement is Mistral Medium 3.5. This page is built from Mistral’s official deprecation notice and is rechecked weekly; the source link is below.
Past scheduled retirement. The published shutdown date has passed; this is a historical notice, not a live availability check.
When is Mistral Medium 3.1 being deprecated?
| Model | Provider | Retires | Replacement |
|---|---|---|---|
| Mistral Medium 3.1 | Mistral | 2026-08-31 | Mistral Medium 3.5 |
Source: Mistral deprecation notice · announced 2026-05-22
Test before switching
- Check the replacement's supported API endpoints and request parameters.
- Test your prompts, structured output, streaming and tool calls on staging.
- Compare quality, latency, pricing and rate limits on your workload.
- Keep a rollback path while the old model remains available.
Download retirement dates for your models.
What should I migrate Mistral Medium 3.1 to?
Mistral documents Mistral Medium 3.5 as the successor. This is not a compatibility guarantee: request parameters, API endpoints, pricing, tool calls and output behaviour may differ. Check the linked provider documentation and run your own workload before switching.
Measured latency of the Mistral API host
| Region | p50 TTFB | p95 | Uptime | Probes |
|---|---|---|---|---|
| Asia (Tokyo) | 315 ms | 404 ms | 100% | 288 |
| Europe (Germany) | 100 ms | 202 ms | 100% | 291 |
| South America (São Paulo) | 255 ms | 342 ms | 100% | 288 |
| US (Central) | 195 ms | 271 ms | 100% | 288 |
Edge latency to the provider’s API host over the last 24 hours, measured from 4 regions. This measures the endpoint, not the model: swapping models on the same host is not an inference benchmark or a promise about the replacement model. Compare edge latency →
What else retires on 2026-08-31?
| Model | Provider | Retires | Replacement |
|---|---|---|---|
| Mistral Medium 3 | Mistral | 2026-08-31 | Mistral Medium 3.5 |
Same shutdown date. If you call more than one of these, they are one migration, not several.
Other Mistral models being retired
| Model | Provider | Retires | Replacement |
|---|---|---|---|
| Leanstral | Mistral | 2026-06-30 | Leanstral 1.5 |
| Mistral Small 3.2 | Mistral | 2026-07-31 | Mistral Small 4 |
| Voxtral Mini Transcribe | Mistral | 2026-05-31 | Voxtral Mini Transcribe 2 |
| Devstral 2 | Mistral | 2026-07-31 | Mistral Medium 3.5 |
| Magistral Medium 1.1 | Mistral | 2025-11-30 | Mistral Medium 3.5 |
| Mistral Small Creative | Mistral | 2026-04-30 | Ministral 3 8B |
| Devstral Small 2 | Mistral | 2026-03-31 | Mistral Medium 3.5 |
| Magistral Medium 1.2 | Mistral | 2026-07-31 | Mistral Medium 3.5 |
How is this calendar maintained?
Entries are pulled from provider documentation by an automated weekly job and every one carries a link to its source. Nothing is inferred from blog posts or social media. When a provider changes a date, the change appears here after the next run and is visible in the changelog. The full calendar across all providers is on the deprecations page, and this provider’s own list is at Mistral deprecations.