WeavePrism

GPT-5.1 vs Mistral Medium 3

Mistral Medium 3 costs 77% less at typical usage ($0.80 vs $3.44 per 1M tokens). GPT-5.1 scores higher on 11 of 11 tasks.

SpecGPT-5.1Mistral Medium 3
Input /1M$1.25$0.40
Output /1M$10.0$2.00
Typical /1M$3.44$0.80
Context window400k128k
SpeedBriskFast
PrivacyStandardStrong
Open weightsNoNo
GPT-5.1
Steady since we started tracking (Jul 13, 2026)
Steady since we started tracking (Jul 13, 2026)
Mistral Medium 3
Steady since we started tracking (Jul 13, 2026)
Steady since we started tracking (Jul 13, 2026)

Quality by task

Coding94/83
Agents93/80
Reasoning96/84
Writing92/84
Chat93/86
Classify88/84
Extract89/84
Summarize91/85
Translate90/88
Vision94/82
General94/83

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Also compare Mistral Medium 3

Prices are list $/1M tokens, hand-maintained from public provider pricing. Task scores are benchmark-informed 0-100 estimates, not gospel — validate on your own evals before moving production traffic. Not affiliated with any model provider.