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Anthropic: Claude Opus 5.5 vs Mistral: Mistral Medium 3.5

Mistral: Mistral Medium 3.5 is 2.7× cheaper for the sample workload; Anthropic: Claude Opus 5.5 has the larger context window.

MetricAnthropic: Claude Opus 5.5Mistral: Mistral Medium 3.5
Model IDanthropic/claude-opus-5.5mistralai/mistral-medium-3-5
Prompt price$4.00 / 1M tokens$1.50 / 1M tokens
Completion price$20.00 / 1M tokens$7.50 / 1M tokens
Context1,000,000 tokens262,144 tokens
Tool calling✓✓
Structured outputs✓✓
Reasoning✓✓
Response format✓✓
Web search––
Input modalitiestext, image, filetext, image, file
Output modalitiestexttext
Added2026-09-222026-04-30

Sample workload

Chat app: 1,000 prompt + 500 completion tokens × 100 requests per day.

CostAnthropic: Claude Opus 5.5Mistral: Mistral Medium 3.5
Per day$1.40$0.53
Per 30 days$42.00$15.75

Difference: $0.88 per day and $26.25 per 30 days.

Data updated 2026-10-30