OpenAIGPT-5.5 ProVSxAIGrok 4.3
Our Take
Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing GPT-5.5 Pro and Grok 4.3 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/Acomplex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)Winner (+6.1%)
96.2%graduate-level science QA
Cost & Context
Cost (per 1M tokens)
$67.50Input: $30.00 | Output: $180.00Context WindowLarger
1.05M tokensBenchmarks & Scores
Coding (swe-bench-pro)
N/Acomplex codebases, multi-file repositories, and architectural planning
Reasoning (gpqa-diamond)
90.1%graduate-level science QA
Cost & Context
Cost (per 1M tokens)43.2x cheaper
$1.56Input: $1.25 | Output: $2.50Context Window
1.05M tokensFrequently Asked Questions about GPT-5.5 Pro vs Grok 4.3
Grok 4.3 is cheaper than GPT-5.5 Pro. Grok 4.3 has a blended cost of $1.56/1M tokens, which is about 43.2x cheaper than GPT-5.5 Pro at $67.50/1M tokens.
Related Matchups
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