ZMIME
Comparison · 2 models · Updated Oct 4, 2026

Claude Sonnet 3.7 vs Mistral Medium 3

Too close to call on our weighted score (Mistral Medium 3 53, Claude Sonnet 3.7 50). The right pick depends on what you value most.

  1. Anthropic

    Claude Sonnet 3.7

    Released Feb 19, 2025

    50/100
    • ECI141.2
    • Price$3.00 / $15.00
    • Context200K
    Full specs Remove Claude Sonnet 3.7

  2. Mistral AI

    Mistral Medium 3

    Released May 7, 2025

    53/100
    • ECI134.1
    • Price$0.40 / $2.00
    • Context131K
    Full specs Remove Mistral Medium 3

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    Make it a three-way comparison.

01 — Verdict

Too close to call

It is close. Our weighted score puts them within 2 points (Mistral Medium 3 53/100, Claude Sonnet 3.7 50/100), so choose by what matters most for your work: Claude Sonnet 3.7 for raw capability and Mistral Medium 3 on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

  • CapabilityClaude Sonnet 3.7Capabilities Index (ECI): Claude Sonnet 3.7 141.2 · Mistral Medium 3 134.1
  • Lowest priceMistral Medium 3Mistral Medium 3 $0.80 · Claude Sonnet 3.7 $6.00 per 1M tokens (3:1 blend)
  • Longest contextClaude Sonnet 3.7Claude Sonnet 3.7 200,000 · Mistral Medium 3 131,072 tokens
  • Widest inputsClaude Sonnet 3.7Claude Sonnet 3.7: Text, Images, PDFs · Mistral Medium 3: Text, Images
  • Self-hostingNo open weightsBoth are available only through APIs
How the score is built
MeasureWeightClaude Sonnet 3.7Mistral Medium 3
CapabilityCapabilities Index (ECI)50%6758
Price25%1354
Inputs & features15%7050
Context window10%3224
Overall100%50/10053/100
02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Claude Sonnet 3.7 vs Mistral Medium 3 specifications side by side
SpecificationClaude Sonnet 3.7AnthropicMistral Medium 3Mistral AI
Capability
Capabilities Index (ECI)141.2 (best)134.1
ECI rank#96 of 148 (best)#117 of 148
GPQA DiamondGraduate-level science questions79.7% (best)59.5%
OTIS Mock AIME 2024–2025Competition mathematics57.8% (best)32.2%
SWE-bench VerifiedFixing real GitHub issues61.0%—
Price per million tokens
Input$3.00$0.40 (best)
Output$15.00$2.00 (best)
Cached input——
Blended (3:1)$6.00$0.80 (best)
Long-context rateSame rateSame rate
Price sourceMedian of 3 providersOfficial Mistral API
Limits
Context window200,000 tokens (best)131,072 tokens
Max output64,000 tokens131,072 tokens (best)
Inputs and features
TextYesYes
ImagesYesYes
PDFsYesNo
AudioNoNo
VideoNoNo
ReasoningYesNo
Tool callingYesYes
Structured outputNoNo
Availability
WeightsProprietaryProprietary
API model ID—mistral-medium-2505
API providers35 (best)
ReleasedFeb 19, 2025May 7, 2025
Knowledge cutoffOct 31, 2024May 2025
03 — Cost

What would a month cost?

Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.

  • Claude Sonnet 3.7$60.00
  • Mistral Medium 3$8.00
04 — Questions

Which should you choose?

Which is better: Claude Sonnet 3.7 or Mistral Medium 3?

It is close. Our weighted score puts them within 2 points (Mistral Medium 3 53/100, Claude Sonnet 3.7 50/100), so choose by what matters most for your work: Claude Sonnet 3.7 for raw capability and Mistral Medium 3 on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Which is cheaper, Claude Sonnet 3.7 or Mistral Medium 3?

Mistral Medium 3 is cheaper at $0.40 input / $2.00 output per million tokens (official Mistral API price). Claude Sonnet 3.7 costs $3.00 input / $15.00 output per million tokens (median across 3 API providers). At a typical mix of three input tokens to one output token, that is $0.80 per million tokens for Mistral Medium 3 versus $6.00 for Claude Sonnet 3.7 (7.5× as much).

Which scores higher on benchmarks?

Claude Sonnet 3.7 scores higher on the Capabilities Index (ECI): Claude Sonnet 3.7 141.2 (#96 of 148) and Mistral Medium 3 134.1 (#117 of 148). Their confidence ranges do not overlap (138.7–142.9 vs 130.5–135.6), so the gap is a real one. On individual benchmarks: GPQA Diamond — Claude Sonnet 3.7 79.7%, Mistral Medium 3 59.5%; OTIS Mock AIME 2024–2025 — Claude Sonnet 3.7 57.8%, Mistral Medium 3 32.2%.

Which is better for coding?

There are no published SWE-bench Verified results for Mistral Medium 3 yet, so there is no like-for-like coding score. On overall capability, Claude Sonnet 3.7 leads, which tends to carry over to coding, but test on your own codebase. Both support tool calling for agent workflows.

Which has the bigger context window?

Claude Sonnet 3.7 has the largest context window at 200,000 tokens, against 131,072 for Mistral Medium 3. Maximum output per response: Claude Sonnet 3.7 up to 64,000, Mistral Medium 3 up to 131,072 tokens.

Which can read images, PDFs, audio or video?

Claude Sonnet 3.7 accepts text, images and PDFs; Mistral Medium 3 accepts text and images. Claude Sonnet 3.7 handles the widest range of inputs.

Are any of these open source?

No. Claude Sonnet 3.7 and Mistral Medium 3 are proprietary and only available through APIs and apps.

Which is newer?

Mistral Medium 3 is the newest, released May 7, 2025. Claude Sonnet 3.7 came out Feb 19, 2025. Knowledge cutoff: Claude Sonnet 3.7 Oct 31, 2024, Mistral Medium 3 May 2025.

How do you decide the winner?

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.

05 — Keep comparing

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