AnthropicClaude Opus 5VSOpenAIGPT-5.6 Sol
Our Take
We recommend choosing Claude Opus 5 as it delivers superior coding capability while matching the reasoning accuracy of GPT-5.6 Sol at a 1.1x API cost saving. Choose Claude Opus 5 for superior overall value and coding efficiency.
▶WHY?
Benchmark Calculations & Evidence:
Coding Benchmarks: Both models were evaluated on the SWE-bench Pro benchmark. Claude Opus 5 scored 79.2%, while GPT-5.6 Sol scored 64.6%.
Reasoning Benchmarks: Both models were evaluated on the GPQA Diamond benchmark. Claude Opus 5 scored 93.7%, while GPT-5.6 Sol scored 94.6%.
Cost Efficiency: GPT-5.6 Sol pricing ($5/M input, $30/M output) is 1.1x cheaper than Claude Opus 5 ($5/M input, $25/M output).
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Benchmarks & Scores
Coding (swe-bench-pro)Winner (+14.6%)
79.2%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)
93.7%graduate-level science QA
Cost & Context
Cost (per 1M tokens)1.1x cheaper
$10.00Input: $5.00 | Output: $25.00Context Window
1.05M tokensBenchmarks & Scores
Coding (swe-bench-pro)
64.6%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)Winner (+0.9%)
94.6%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$11.25Input: $5.00 | Output: $30.00Context WindowLarger
1.05M tokensFrequently Asked Questions about Claude Opus 5 vs GPT-5.6 Sol
Claude Opus 5 is cheaper than GPT-5.6 Sol. Claude Opus 5 has a blended cost of $10.00/1M tokens, which is about 1.1x cheaper than GPT-5.6 Sol at $11.25/1M tokens.
Claude Opus 5 is better for coding tasks on this benchmark. It scores 79.2% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning) compared to GPT-5.6 Sol which scores 64.6%.
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