GPT-6.1 Terra vs Grok 4.20

GPT-6.1 Terra against Grok 4.20
GPT-6.1 TerraGrok 4.20
Coding index77.433.3
Benchmarks behind it Verified, 4 benchmarks Partial, 2 benchmarks
Output $/Mtok$5.00$2.50
Cost per solved taskNot computable$0.72
Context window1.05M2M