OpenAI's mid-tier GPT-6.1 model for computer use, visual reasoning and coding, priced at $1/$5 per million tokens.
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GPT-6.1 Terra is a closed OpenAI model positioned in the GPT-6.1 family below GPT-6.1 Sol and GPT-6 Astra. OpenAI describes it as a fast, efficient model combining visual reasoning and computer use with clearer writing, and as a significant step up from GPT-5.6 Terra.\n\nPer OpenAI's announcement, it scores higher than GPT-5.6 Terra on computer-use benchmarks (Agents' Last Exam, OSWorld 2.1), visual reasoning (MMMU-Pro) and coding (Terminal-Bench 4.0, 50.3% at max effort vs 21.5%). OpenAI also reports a lower error rate on its internal error-inducing-prompt benchmark (16.7% at low effort, 4.3% at max effort). For the most complex coding tasks, OpenAI says Sol and Astra remain the better choice. These figures are vendor-reported. A reviewer on YouTube found it only slightly cheaper and less capable than Sol on his own benchmark, and was unsure who it targets.\n\nIt is available in ChatGPT Work and Codex for Plus, Pro, Enterprise and Edu users, and through the OpenAI API as gpt-6.1-terra. Standard API pricing is $1 per million input tokens, $0.05 per million cached input tokens and $5 per million output tokens. OpenAI states it meets the Critical threshold for cybersecurity under its Preparedness Framework and keeps the safeguards developed for GPT-6 Astra.
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Closed OpenAI model with 50% lower standard API prices than GPT 5.6 Terra and better capability. It matches GPT 6 Astra at about 1/10 the per-token price and finishes tasks over 3x faster, per the cited charts.
Mid-tier GPT-6.1 model between Luna and Sol, strong at computer use, cheap with low factual error rate. Below Sol and Sonnet 5.5 on some benchmarks but much cheaper; available in paid plans and API.
New mid-tier OpenAI model below Sol and Astra. Creator compares benchmarks and costs and finds it only slightly cheaper but dumber than GPT-6.1 Sol, and doesn't understand who it's for. On his bench it took 7 minutes, cost 19 cents and placed fifth.
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