GPT-6.1 Terra

Released 2026-10-26 per OpenAI's own API changelog ("Released GPT-6.1 Terra, a fast, efficient model for visual reasoning, precise computer use, and clear, natural writing", tagged v1/responses and v1/chat/completions). Text+image input, text output (audio and video are listed as unsupported); 1,050,000-token context with a stated maximum of 922,000 input tokens, 128,000 max output, Jun 01 2026 knowledge cutoff. reasoning.effort supports none, low, medium (default), high, xhigh and max. Standard tier per 1M: $1.00 in / $0.05 cached in / $1.25 cache write / $5.00 out, stated identically on the model page and in the pricing page's Standard table; the model page adds "Cached input tokens are priced at 5% of the uncached input token rate" and that cache writes at 12-hour retention cost $2.50. Prompts with more than 272K input tokens are priced at 2x input and cache rates and 1.5x output for the full request; the price fields carry the <=272K band. Batch and Flex are 50% of Standard; Fast mode is 2x Standard; regional processing adds a 10% premium where available. Tool calling requires the Responses API. Snapshot list on the model page is the bare alias gpt-6.1-terra only; no dated snapshot is published. Also listed for Amazon Bedrock (openai.gpt-6.1-terra) and Google Cloud (private preview). STATUS: recorded as ga on the same reading as the GPT-6.1 Sol row - OpenAI's changelog says "Released" and the model page carries no access or rollout qualifier; OpenAI does not use the words "generally available". Lifecycle fields are null: OpenAI states no deprecation for this model and announced none alongside the release. Recorded 2026-11-10, fifteen days after OpenAI's date: the event is theirs, the delay is ours - no instrument in the daily routine reads OpenAI's changelog, and it surfaced only because a prose diff on the pricing page forced a manual read.

Source: OpenAI official documentation ↗

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GPT-6.1 Terra — questions & answers