OpenAI
GPT-5.5 Pro
VS
xAI
Grok 4.20
Decision Recommendation
📊 Comparison Summary: GPT-5.5 Pro and Grok 4.20 present close characteristics. Review the specific benchmark scorelines below to determine which engine matches your needs.
Model Specs
GPT-5.5 Pro
Benchmarks & Scores
Coding (swe-bench-pro)
N/AReasoning (gpqa-diamond)Winner (+6.2%)
96.2%Cost & Performance
Cost (per 1M tokens)
$67.50Input: $30.00 | Output: $180.00Speed
74 tpsContext WindowLarger
1.05M tokensModel Specs
Grok 4.20
Benchmarks & Scores
Coding (swe-bench-pro)Winner (+)
51.8%Reasoning (gpqa-diamond)
90%Cost & Performance
Cost (per 1M tokens)22.5x cheaper
$3.00Input: $2.00 | Output: $6.00Speed3.1x faster
233 tpsContext Window
1M tokensWant to customize weights or add more models?
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