Magistral Medium 1.2

Shut downMistral AImistral/magistral-medium-1-21 platform

What breaks Add its dates to my calendar

Next shutdown: None setNo date on 1 platform
Context window: 128Ktokens
Released: Sep 18, 2025Mistral AI

Dates on every platform

1 listings · a floor is the earliest possible date

Magistral Medium 1.2 on each platform: model ID, status, dates, replacement and source
Platform	Model ID and status	Deprecated	Shuts down	Replacement
Mistral APIMistral AI: Models Overview (opens in a new tab) · checked Oct 14, 2026	`magistral-medium-2509`Shut down · also magistral-medium-latest	May 22, 2026	Jul 31, 2026Shut down	Mistral Medium 3.5

Mistral's models overview still showed the status Deprecated on 14 October 2026, after the retirement date.

What breaks when you move off Magistral Medium 1.2

Behavior
Magistral models always returned thinking traces. Mistral Small 4 and Mistral Medium 3.5 reason through the reasoning_effort parameter: high returns a thinking chunk before the answer, none omits it.
Devstral 2, Magistral Medium 1.2, Mistral Nemo 12B Instruct · Mistral API · Jul 31, 2026

Change history

Jul 31, 2026ShutdownDevstral 2, Magistral Medium 1.2 and Mistral Nemo retire from the Mistral APIMistral API1 break

devstral-2512, magistral-medium-2509 and open-mistral-nemo-2407 retired on 31 July 2026. Mistral names Mistral Medium 3.5 as the replacement for Devstral 2 and Magistral Medium 1.2, and Ministral 3 8B for Mistral Nemo.

Platform: Mistral API
Models: Devstral 2, Magistral Medium 1.2, Mistral Nemo 12B Instruct
Announced: May 22, 2026

BehaviorMagistral models always returned thinking traces. Mistral Small 4 and Mistral Medium 3.5 reason through the reasoning_effort parameter: high returns a thinking chunk before the answer, none omits it.

Source: Mistral AI, Models Overview (opens in a new tab); Mistral AI, Native reasoning (deprecated) (opens in a new tab); Mistral AI, Reasoning (opens in a new tab)