Claude Opus 4.5 vs Mistral Small 4
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Mistral Small 4 by Mistral wins on 4 of 6 benchmarks against Claude Opus 4.5 by Anthropic, which leads on 2. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Reasoning: In reasoning, Claude Opus 4.5 scores 86.5% on GPQA Diamond compared to Mistral Small 4's 75.8%, while Claude Opus 4.5 scores 77.0% on τ²-Bench Airline compared to Mistral Small 4's 43.7%.
Context: In context, Mistral Small 4 scores 262K on Context Length compared to Claude Opus 4.5's 200K.
Pricing Comparison
Claude Opus 4.5 costs $5.0/1M input tokens and $25.0/1M output tokens, while Mistral Small 4 costs $0.15/1M input and $0.60/1M output. Mistral Small 4 is the more affordable option for API usage.
Verdict
Mistral Small 4 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Opus 4.5 vs Mistral Small 4 — FAQ
Which is better, Claude Opus 4.5 or Mistral Small 4?
Mistral Small 4 wins on more benchmarks overall (4 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Opus 4.5 compare to Mistral Small 4 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Claude Opus 4.5 cheaper than Mistral Small 4?
Yes, Mistral Small 4 is cheaper. Claude Opus 4.5 costs $5.0/1M input and $25.0/1M output tokens. Mistral Small 4 costs $0.15/1M input and $0.60/1M output tokens.
Which is faster, Claude Opus 4.5 or Mistral Small 4?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the Claude Opus 4.5 vs Mistral Small 4 comparison cover?
This comparison covers 6 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, Cached Input Cost, τ²-Bench Airline. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.