GPT-5.1-Codex vs Grok 4.3

GPT-5.1-Codex against Grok 4.3
GPT-5.1-CodexGrok 4.3
Coding index15.337.4
Benchmarks behind it Partial, 2 benchmarks Verified, 3 benchmarks
Output $/Mtok$10.00$2.50
Cost per solved task$0.892$0.31
Context window400K1M