GoogleGemini 2.5 ProVSOpenAIGPT-5.4
Our Take
We recommend GPT-5.4 for complex complex codebases, multi-file repositories, and architectural planning, or the 1.6x cheaper Gemini 2.5 Pro if your budget requires optimizing costs for very high-volume pipelines. While GPT-5.4 offers a clear reasoning advantage, it carries a moderate price premium. Choose GPT-5.4 for architectural codebase planning, or Gemini 2.5 Pro to save on API costs for simple scripts.
▶WHY?
Benchmark Calculations & Evidence:
Coding Evaluation: Gemini 2.5 Pro was evaluated on SWE-bench Verified (scoring 59.6%), while GPT-5.4 was evaluated on SWE-bench Pro (scoring 57.7%).
Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. GPT-5.4 scored 92.8%, while Gemini 2.5 Pro scored 84.4%.
Cost Efficiency: Gemini 2.5 Pro pricing ($1.25/M input, $10/M output) is 1.6x cheaper than GPT-5.4 ($2.5/M input, $15/M output).
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Benchmarks & 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)1.6x cheaper
$3.44Input: $1.25 | Output: $10.00Context Window
1.05M tokensBenchmarks & Scores
Coding (swe-bench-pro)
57.7%complex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)Winner (+8.4%)
92.8%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$5.63Input: $2.50 | Output: $15.00Context WindowLarger
1.05M tokensFrequently Asked Questions about Gemini 2.5 Pro vs GPT-5.4
Gemini 2.5 Pro is cheaper than GPT-5.4. Gemini 2.5 Pro has a blended cost of $3.44/1M tokens, which is about 1.6x cheaper than GPT-5.4 at $5.63/1M tokens.
For coding tasks, Gemini 2.5 Pro scores 59.6% on swe-bench-verified (multi-file code and clearly defined tasks), while GPT-5.4 scores 57.7% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning).
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