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Mistral Medium 3.1

mistral/mistral-medium

Mistral Medium 3.1 was the top MT-Bench tier at Mistral AI's La Plateforme launch (8.6), with multilingual output across English, French, Italian, German, Spanish, and code.

Tool UseVision (Image)
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'mistral/mistral-medium',
  prompt: 'Why is the sky blue?'
})

What To Consider When Choosing a Provider

  • Zero Data Retention

    AI Gateway supports Zero Data Retention for this model via direct gateway requests (BYOK is not included). To configure this, check the documentation.

    Authentication

    AI Gateway authenticates requests using an API key or OIDC token. You do not need to manage provider credentials directly.

Mistral Medium 3.1 covers English, French, Italian, German, Spanish, and code. This makes Mistral Medium 3.1 a fit for European teams needing a single model across languages.

When to Use Mistral Medium 3.1

Best For

  • Multilingual European output:

    Coherent generation across English, French, Italian, German, and Spanish

  • Existing production integrations:

    Teams with deployments built on Mistral Medium 3.1

  • Code generation with multilingual docs:

    Tasks combining code and European-language comments

  • Validated benchmark profile:

    Applications where historical benchmarks are a known quantity

Consider Alternatives When

  • Higher capability general-purpose:

    You need a newer Mistral AI model (consider Mistral AI Large 3)

  • Mathematical or structured reasoning:

    Tasks that require explicit reasoning traces (consider Magistral models)

  • Vision input support:

    You need multimodal input (consider Pixtral models)

  • Paramount cost efficiency:

    Cost dominates selection (consider Ministral or Mistral AI Small)

Conclusion

Mistral Medium 3.1 was Mistral AI's top MT-Bench launch endpoint. Mistral Medium 3.1 remains an option for European-language and code workloads tied to older integrations.

FAQ

8.6 on MT-Bench at La Plateforme's launch, per Mistral AI's announcement.

English, French, Italian, German, Spanish, and code.

Mistral Medium 3.1 sat above Mistral-tiny (efficiency) and Mistral-small (balance) in Mistral AI's launch lineup and had the highest MT-Bench score of the three.

For new projects, consider more recent models like Mistral AI Large 3 or Mistral AI Small. Mistral Medium 3.1 is most relevant for teams with existing integrations.

Check the AI Gateway model capabilities documentation for documented capabilities. Function-calling support evolved across Mistral AI model generations.

At La Plateforme's launch, Mistral AI Small occupied the balanced tier between tiny and medium. Mistral AI Small has since been updated (September 2024) while Medium retains its original profile.

Use Mistral Medium 3.1 through AI Gateway via the AI SDK, Chat Completions API, Responses API, Messages API, or other API formats.