GPT-5.4 Nano vs Grok 4.7

GPT-5.4 Nano against Grok 4.7
GPT-5.4 NanoGrok 4.7
Coding index44.866.7
Benchmarks behind it Partial, 2 benchmarks Verified, 5 benchmarks
Output $/Mtok$1.25$6.00
Cost per solved task$0.14Not computable
Context window400K500K