AnthropicClaude Opus 5VSGoogleGemini 2.5 Pro
Our Take
We recommend Claude Opus 5 for complex complex codebases, multi-file repositories, and architectural planning, or the 2.9x cheaper Gemini 2.5 Pro if your budget requires optimizing costs for very high-volume pipelines. While Claude Opus 5 offers a clear reasoning advantage, it carries a moderate price premium. Choose Claude Opus 5 for architectural codebase planning, or Gemini 2.5 Pro to save on API costs for simple scripts.
▶WHY?
Benchmark Calculations & Evidence:
Coding Evaluation: Claude Opus 5 was evaluated on SWE-bench Pro (scoring 79.2%), while Gemini 2.5 Pro was evaluated on SWE-bench Verified (scoring 59.6%).
Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. Claude Opus 5 scored 93.7%, while Gemini 2.5 Pro scored 84.4%.
Cost Efficiency: Gemini 2.5 Pro pricing ($1.25/M input, $10/M output) is 2.9x cheaper than Claude Opus 5 ($5/M input, $25/M output).
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Benchmarks & Scores
Coding (swe-bench-pro)
79.2%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)Winner (+9.3%)
93.7%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$10.00Input: $5.00 | Output: $25.00Context Window
1.05M tokensBenchmarks & Scores
Coding (swe-bench-verified)
59.6%multi-file code and clearly defined tasks
Reasoning (gpqa-diamond)
84.4%graduate-level science QA
Cost & Context
Cost (per 1M tokens)2.9x cheaper
$3.44Input: $1.25 | Output: $10.00Context Window
1.05M tokensFrequently Asked Questions about Claude Opus 5 vs Gemini 2.5 Pro
Gemini 2.5 Pro is cheaper than Claude Opus 5. Gemini 2.5 Pro has a blended cost of $3.44/1M tokens, which is about 2.9x cheaper than Claude Opus 5 at $10.00/1M tokens.
For coding tasks, Claude Opus 5 scores 79.2% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning), while Gemini 2.5 Pro scores 59.6% on swe-bench-verified (multi-file code and clearly defined tasks).
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