Claude Opus 4 vs GPT-5.5
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-5.5 by OpenAI wins on 7 of 7 benchmarks against Claude Opus 4 by Anthropic, which leads on 0. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, GPT-5.5 scores 1272 on Design Arena ELO compared to Claude Opus 4's 1171, while GPT-5.5 scores 1269 on Website Arena ELO compared to Claude Opus 4's 1177.
Reasoning: In reasoning, GPT-5.5 scores 93.8% on GPQA Diamond compared to Claude Opus 4's 79.6%.
Context: In context, GPT-5.5 scores 1.1M on Context Length compared to Claude Opus 4's 200K.
Pricing Comparison
Claude Opus 4 costs $15.0/1M input tokens and $75.0/1M output tokens, while GPT-5.5 costs $5.0/1M input and $30.0/1M output. GPT-5.5 is the more affordable option for API usage.
Verdict
GPT-5.5 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Opus 4 vs GPT-5.5 — FAQ
Which is better, Claude Opus 4 or GPT-5.5?
GPT-5.5 wins on more benchmarks overall (7 vs 0). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Opus 4 compare to GPT-5.5 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 cheaper than GPT-5.5?
Yes, GPT-5.5 is cheaper. Claude Opus 4 costs $15.0/1M input and $75.0/1M output tokens. GPT-5.5 costs $5.0/1M input and $30.0/1M output tokens.
Which is faster, Claude Opus 4 or GPT-5.5?
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 vs GPT-5.5 comparison cover?
This comparison covers 7 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, Cached Input Cost, Design Arena ELO, Website Arena ELO. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.