GPT-6.1 Terra matches GPT-6 Astra at 1/10th the price, 3x faster on agent tasks
OpenAI · x · 2026-10-27
OpenAI shared GPT-6.1 Terra results on Agents' Last Exam, a benchmark of how well agents use software at work: it substantially outperforms GPT-5.6 Terra and matches GPT-6 Astra at one-tenth the price per token, finishing tasks over 3x faster on average than both Astra and GPT-6.1 Sol.
The official cost-quality chart shows Terra hitting 55-60% scores in the $0.2-0.6 cost range, while GPT-6 Astra needs $3.5-7.5 for similar performance; Claude Opus 5.5 still tops the chart (63%) at roughly $8.7 per task.
Related event: OpenAI Launches GPT-6.1 Terra with Half-Price API(38 posts)→
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