AnthropicClaude Sonnet 4.6VSOpenAIGPT-5.6 Luna
Our Take
Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing Claude Sonnet 4.6 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)
79.9%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$6.00Input: $3.00 | Output: $15.00Context Window
1.05M tokensBenchmarks & Scores
Coding (swe-bench-pro)
62.7%excellent at multi-file repositories, autonomous agents, and industrial codebases
Reasoning (gpqa-diamond)Winner (+12.4%)
92.3%graduate-level science QA
Cost & Context
Cost (per 1M tokens)2.7x cheaper
$2.25Input: $1.00 | Output: $6.00Context WindowLarger
1.05M tokensFrequently Asked Questions about Claude Sonnet 4.6 vs GPT-5.6 Luna
GPT-5.6 Luna is cheaper than Claude Sonnet 4.6. GPT-5.6 Luna has a blended cost of $2.25/1M tokens, which is about 2.7x cheaper than Claude Sonnet 4.6 at $6.00/1M tokens.
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