OpenAIGPT-5.4 ProVSOpenAIGPT-5.6 Luna
Our Take
Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing GPT-5.4 Pro and GPT-5.6 Luna directly in their respective provider playgrounds to see which fits your specific prompt styles best.
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Benchmarks & Scores
Coding (swe-bench-pro)
N/Aexcellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)
67.6%graduate-level science QA
Cost & Context
Cost (per 1M tokens)16.4x cheaper
$0.14Input: $0.05 | Output: $0.40Context Window
400k tokensBenchmarks & Scores
Coding (swe-bench-pro)
62.7%excellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)Winner (+24.7%)
92.3%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$2.25Input: $1.00 | Output: $6.00Context WindowLarger
1.05M tokensFrequently Asked Questions about GPT-5.4 Pro vs GPT-5.6 Luna
GPT-5.4 Pro is cheaper than GPT-5.6 Luna. GPT-5.4 Pro has a blended cost of $0.14/1M tokens, which is about 16.4x cheaper than GPT-5.6 Luna at $2.25/1M tokens.
Related Matchups
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