Mistral Medium 3.5

Mistral · Released April 2026

Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI.

It belongs to Mistral's catalog, which spans Medium and Large (capability), Small and Ministral (efficiency) and dedicated code and audio models, all with European data-residency roots.

Facts and pricing

Provider

Mistral

Context window

262K tokens

Input price

18.0 credits / 1M tokens ($1.50 raw)

Output price

90.0 credits / 1M tokens ($7.50 raw)

Vision (image input)

Yes

Tool calling

Yes

Extended reasoning

No

Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin. Raw prices shown per 1M tokens.

Try Mistral Medium 3.5 now

What Mistral Medium 3.5 is best for

• Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
• Long documents: the 262K-token window holds lengthy reports, contracts or papers whole
• Working with images: screenshots, charts, photos and scanned documents alongside text
• Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Example prompts

Prompts that suit a frontier model like Mistral Medium 3.5:

• Review this business plan and give me the three hardest questions an investor would ask
• Rewrite this announcement so it lands with both engineers and executives
• I am choosing between two job offers, help me think through the tradeoffs
• Draft a technical design doc for a rate limiter, including failure modes

Mistral family

All 21 Mistral models

Compare Mistral Medium 3.5

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• Mistral Medium 3.5 vs Mistral Small 4
• GPT-5.6 Luna vs Mistral Small 4
• Gemini 3.5 Flash vs Mistral Small 4

Frequently asked questions

What is Mistral Medium 3.5?

Mistral Medium 3.5 is an AI model by Mistral. Mistral Medium 3.5 is a dense 128B instruction-following model from Mistral AI.

How much does Mistral Medium 3.5 cost on Zeplik?

Input tokens cost 18.0 credits per million and output tokens 90.0 credits per million (1 credit = $0.10; the raw provider rates are $1.50 and $7.50 per million). New accounts start with free credits.

How long can a conversation with Mistral Medium 3.5 be?

Mistral Medium 3.5 has a 262K-token context window (262,144 tokens), which covers the conversation plus any documents you attach.

Does Mistral Medium 3.5 support images and tools?

Mistral Medium 3.5 accepts image input and supports tool calling.

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