Claude Opus 4.5 vs o4 Mini
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Opus 4.5 by Anthropic and o4 Mini by OpenAI are evenly matched across 15 benchmarks. 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 o4 Mini's 1350, while Claude Opus 4.5 scores 89.5% on MMLU-Pro compared to o4 Mini's 80.0%.
Coding: In coding, Claude Opus 4.5 scores 92.0% on HumanEval+ compared to o4 Mini's 88.0%, while Claude Opus 4.5 scores 80.9% on SWE-bench Verified compared to o4 Mini's 68.1%, while Claude Opus 4.5 scores 70.0% on LiveCodeBench compared to o4 Mini's 58.0%.
Math: In math, o4 Mini scores 93.0% on MATH compared to Claude Opus 4.5's 90.0%, while o4 Mini scores 97.5% on GSM8K compared to Claude Opus 4.5's 96.5%.
Reasoning: In reasoning, Claude Opus 4.5 scores 87.0% on GPQA Diamond compared to o4 Mini's 81.4%, while Claude Opus 4.5 scores 57.0% on ARC-AGI compared to o4 Mini's 55.0%.
Context: In context, both score 200K on Context Length.
Pricing Comparison
Claude Opus 4.5 costs $5.0/1M input tokens and $25.0/1M output tokens, while o4 Mini costs $1.1/1M input and $4.4/1M output. o4 Mini is the more affordable option for API usage.
Speed Comparison
Claude Opus 4.5 generates output at 50 tok/s compared to o4 Mini's 120 tok/s, and the time to first token is 1700 ms for Claude Opus 4.5 versus 300 ms for o4 Mini. o4 Mini delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence, Claude Opus 4.5 has the edge. For those who value math and affordability and speed, o4 Mini is the stronger choice.
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Claude Opus 4.5 vs o4 Mini — FAQ
Which is better, Claude Opus 4.5 or o4 Mini?
Claude Opus 4.5 and o4 Mini are evenly matched across benchmarks. The best choice depends on your specific priorities such as coding ability, speed, or pricing.
How does Claude Opus 4.5 compare to o4 Mini for coding?
Claude Opus 4.5 is better for coding, scoring 80.9% on SWE-bench Verified compared to 68.1%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude Opus 4.5 cheaper than o4 Mini?
Yes, o4 Mini is cheaper. Claude Opus 4.5 costs $5.0/1M input and $25.0/1M output tokens. o4 Mini costs $1.1/1M input and $4.4/1M output tokens.
Which is faster, Claude Opus 4.5 or o4 Mini?
o4 Mini is faster, generating output at 120 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 o4 Mini 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.