Claude Opus 4.6 vs o3 Pro
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Opus 4.6 by Anthropic wins on 8 of 15 benchmarks against o3 Pro by OpenAI, which leads on 6. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
General Intelligence: In general intelligence, Claude Opus 4.6 scores 1496 on Chatbot Arena ELO compared to o3 Pro's 1410, while o3 Pro scores 86.0% on MMLU-Pro compared to Claude Opus 4.6's 82.0%.
Coding: In coding, Claude Opus 4.6 scores 93.5% on HumanEval+ compared to o3 Pro's 92.0%, while Claude Opus 4.6 scores 80.8% on SWE-bench Verified compared to o3 Pro's 70.0%, while o3 Pro scores 75.0% on LiveCodeBench compared to Claude Opus 4.6's 72.0%.
Math: In math, o3 Pro scores 97.0% on MATH compared to Claude Opus 4.6's 92.0%, while o3 Pro scores 99.0% on GSM8K compared to Claude Opus 4.6's 97.0%, while Claude Opus 4.6 scores 100.0% on AIME 2025 compared to o3 Pro's 98.4%.
Reasoning: In reasoning, Claude Opus 4.6 scores 91.3% on GPQA Diamond compared to o3 Pro's 85.0%, while o3 Pro scores 70.0% on ARC-AGI compared to Claude Opus 4.6's 60.0%.
Context: In context, both score 200K on Context Length.
Pricing Comparison
Claude Opus 4.6 costs $5.0/1M input tokens and $25.0/1M output tokens, while o3 Pro costs $20.0/1M input and $80.0/1M output. Claude Opus 4.6 is the more affordable option for API usage.
Speed Comparison
Claude Opus 4.6 generates output at 68 tok/s compared to o3 Pro's 25 tok/s, and the time to first token is 1680 ms for Claude Opus 4.6 versus 1200 ms for o3 Pro. Claude Opus 4.6 delivers faster throughput.
Verdict
For developers prioritizing coding and general intelligence and affordability and speed, Claude Opus 4.6 has the edge. For those who value math, o3 Pro is the stronger choice.
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Claude Opus 4.6 vs o3 Pro — FAQ
Which is better, Claude Opus 4.6 or o3 Pro?
Claude Opus 4.6 wins on more benchmarks overall (8 vs 6). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Opus 4.6 compare to o3 Pro for coding?
Claude Opus 4.6 is better for coding, scoring 80.8% on SWE-bench Verified compared to 70.0%. SWE-bench tests real-world software engineering by resolving actual GitHub issues.
Is Claude Opus 4.6 cheaper than o3 Pro?
Yes, Claude Opus 4.6 is cheaper. Claude Opus 4.6 costs $5.0/1M input and $25.0/1M output tokens. o3 Pro costs $20.0/1M input and $80.0/1M output tokens.
Which is faster, Claude Opus 4.6 or o3 Pro?
Claude Opus 4.6 is faster, generating output at 68 tok/s compared to 25 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the Claude Opus 4.6 vs o3 Pro comparison cover?
This comparison covers 15 benchmarks including Chatbot Arena ELO, MMLU-Pro, HumanEval+, MATH, SWE-bench Verified, GPQA Diamond, Output Speed, Time to First Token, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.