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Magistral Small 2509

Magistral Small 2509 is a 24B open-source reasoning model under Apache 2.0 with 70.7% on AIME 2024. It's Mistral AI's compact reasoning option in the Magistral family.

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


const result = streamText({
  model: 'mistral/magistral-small',
  prompt: 'Why is the sky blue?'
})
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Frequently Asked Questions

  • What are Magistral Small 2509's AIME benchmark scores?

    70.7% on AIME 2024 and 83.3% with majority voting.

  • What is the parameter count and license?

    24B parameters under Apache 2.0, available for download from Hugging Face.

  • Does Magistral Small 2509 produce chain-of-thought reasoning?

    Yes. Like Magistral Medium, Magistral Small 2509 exposes step-by-step reasoning traces for each response.

  • Which languages does Magistral Small 2509 reason in?

    English, French, Spanish, German, Italian, Arabic, Russian, and Simplified Chinese, the same set as Magistral Medium.

  • How does Magistral Small 2509 compare to Magistral Medium?

    Magistral Small 2509 is 24B parameters and open-source. Magistral Medium is the larger, API-first release. On AIME 2024, Small is 70.7% single-sample versus Medium at 73.6%; the gap is most visible on heavy math, less on typical business prompts.

  • Is Magistral Small 2509 available via API?

    Yes. You can access Magistral Small 2509 through AI Gateway.