Claude Opus 4.5 vs Mistral Medium 3.1
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Opus 4.5 by Anthropic wins on 10 of 15 benchmarks against Mistral Medium 3.1 by Mistral, which leads on 5. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Claude Opus 4.5 scores 1468 on Chatbot Arena ELO compared to Mistral Medium 3.1's 1250, while Claude Opus 4.5 scores 89.5% on MMLU-Pro compared to Mistral Medium 3.1's 66.0%.
Coding: In coding, Claude Opus 4.5 scores 92.0% on HumanEval+ compared to Mistral Medium 3.1's 77.0%, while Claude Opus 4.5 scores 80.9% on SWE-bench Verified compared to Mistral Medium 3.1's 28.0%, while Claude Opus 4.5 scores 70.0% on LiveCodeBench compared to Mistral Medium 3.1's 34.0%.
Math: In math, Claude Opus 4.5 scores 90.0% on MATH compared to Mistral Medium 3.1's 68.0%, while Claude Opus 4.5 scores 96.5% on GSM8K compared to Mistral Medium 3.1's 86.0%.
Reasoning: In reasoning, Claude Opus 4.5 scores 87.0% on GPQA Diamond compared to Mistral Medium 3.1's 40.0%, while Claude Opus 4.5 scores 57.0% on ARC-AGI compared to Mistral Medium 3.1's 18.0%.
Context: In context, Claude Opus 4.5 scores 200K on Context Length compared to Mistral Medium 3.1's 131K.
Pricing Comparison
Claude Opus 4.5 costs $5.0/1M input tokens and $25.0/1M output tokens, while Mistral Medium 3.1 costs $0.40/1M input and $2.0/1M output. Mistral Medium 3.1 is the more affordable option for API usage.
Speed Comparison
Claude Opus 4.5 generates output at 50 tok/s compared to Mistral Medium 3.1's 110 tok/s, and the time to first token is 1700 ms for Claude Opus 4.5 versus 200 ms for Mistral Medium 3.1. Mistral Medium 3.1 delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and math, Claude Opus 4.5 has the edge. For those who value affordability and speed, Mistral Medium 3.1 is the stronger choice.
View Individual Model Pages
Claude Opus 4.5 vs Mistral Medium 3.1 — FAQ
Which is better, Claude Opus 4.5 or Mistral Medium 3.1?
Claude Opus 4.5 wins on more benchmarks overall (10 vs 5). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Opus 4.5 compare to Mistral Medium 3.1 for coding?
Claude Opus 4.5 is better for coding, scoring 80.9% on SWE-bench Verified compared to 28.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude Opus 4.5 cheaper than Mistral Medium 3.1?
Yes, Mistral Medium 3.1 is cheaper. Claude Opus 4.5 costs $5.0/1M input and $25.0/1M output tokens. Mistral Medium 3.1 costs $0.40/1M input and $2.0/1M output tokens.
Which is faster, Claude Opus 4.5 or Mistral Medium 3.1?
Mistral Medium 3.1 is faster, generating output at 110 tok/s compared to 50 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude Opus 4.5 vs Mistral Medium 3.1 comparison cover?
This comparison covers 15 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, GPQA Diamond, SWE-bench Verified, Output Speed, LiveCodeBench, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.