Mistral Releases Responses API and Adds External Models
Mistral AI has launched a public preview of a Responses API compatible with the OpenAI format and has added the DeepSeek V4.1 Flash and GLM 5.3 Flash models.
What happened?
Mistral AI has launched a public preview of a new Responses API, designed based on the OpenAI Responses format to support the development of AI agents. The interface is stateless and compatible with all chat models on the company's platform. At the same time, two fast, low-cost models from external providers have been introduced to the inference offering: DeepSeek V4.1 Flash in preview and Z.ai's GLM 5.3 Flash, which is now generally available.
Key facts
| Lanseringsdatum | 28 oktober 2026 |
|---|---|
| Nytt API-format | Responses API (OpenAI-kompatibelt) |
| Nya modeller | DeepSeek V4.1 Flash och GLM 5.3 Flash |
| Status för Responses API | Publik förhandsvisning (public preview) |
”designed to build agents on Mistral”
Why it matters
Adopting the OpenAI API format lowers the barrier for developers to switch model providers or route calls between different providers. The addition of DeepSeek and GLM models gives users access to alternative, cost-effective options directly within Mistral's infrastructure.
Who is affected?
The update concerns developers and companies building agent-based systems or those looking to migrate applications from the OpenAI ecosystem without extensive code changes. It also impacts organizations seeking low-cost inference with alternative models.
Impact on the EU
The service is provided globally by the French company Mistral AI via its infrastructure, meaning European developers can use the interface directly through the company's existing platform.
What else you should know
The launch marks the first time Mistral has officially provided inference for models from external Chinese providers alongside its own proprietary models.
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