Claude Opus 5.5 vs Mistral Medium 3.5

Price, context window & benchmark comparison

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Claude Opus 5.5

Anthropic
$4.00 / $20.00
Input / Output · per 1M tokens
VS
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Mistral Medium 3.5

Mistral AI
$1.50 / $7.50
Input / Output · per 1M tokens
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Verdict: Mistral Medium 3.5 is 2.7× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix. Claude Opus 5.5 scores higher on the Artificial Analysis Intelligence Index (57.6 vs 14.2). Claude Opus 5.5 has the larger context window (1M vs 262K).
Claude Opus 5.5Mistral Medium 3.5
Input price / 1M$4.00$1.50
Output price / 1M$20.00$7.50
Blended price (3:1)$8.00$3.00
Cached input / 1M$0.20
Context window1M262K
Max output128K210K
Intelligence index57.614.2
Coding index46.9
Providers112
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-222026-04-30
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FAQ

Which is cheaper, Claude Opus 5.5 or Mistral Medium 3.5?

Mistral Medium 3.5 is 2.7× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix.

Claude Opus 5.5 vs Mistral Medium 3.5: which has a bigger context window?

Claude Opus 5.5: 1,000,000 tokens. Mistral Medium 3.5: 262,144 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Opus 5.5 ≈ $18,000, Mistral Medium 3.5 ≈ $6,750.

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