
Launched Oct 26, 2026, GPT-6.1 Terra scores 51.3 on Intelligence Index v5 at $0.96 per task and $1/$5 per 1M tokens, with #3 on LiveBench 2.0 Coding (89.2), #4 on FrontierCode 2.0 (42.3%), and 55.6% on Terminal-Bench 4.0. It trails #7 Gemini 4 Argon on Arena preference and hallucination rate, but beats #9 Muse Wonder Full by 7.0 BenchAlign points. Key 2026 benchmarks — Developer: OpenAI; Intelligence Index v5: 51.3 (#8); BenchAlign v5.8: 79.7 (#9); API Pricing (1M): $1 in / $5 out; Context Window: 1.05M tokens.
Ranked #8 on "Claude Fable 5.2 vs. Gemini 4 Carbon? Top 10 Frontier AI Models Ranked (2026)". Cast your vote to back or challenge this spot.
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