Model board / GPT-6.1 Terra

Verified 2026-10-29 against the pages listed below. Prices are USD per 1M tokens, list rate — no committed-use, enterprise or volume discount.

released 2026-10-26. Above 272K input tokens the whole request bills at 2x input and cache and 1.5x output: $2.00/$0.10/$7.50. Batch and Flex halve every column. Cached input at 5% of input, like GPT-6.1 Sol; a 12-hour cache write is $2.50

1,050,000 window, 922,000 max input and 128,000 max output, on the model's own page

cached input at 0.05x base, as on GPT-6.1 Sol; implicit or explicit-only mode, and an entry lives at least 30 minutes after its last write or reuse

Watch out

Image and text in, text out — audio and video are unsupported. Tool calling needs the Responses API. Above 272K input every token in the request bills at the higher tier

What we would use it for

OpenAI's visual-reasoning and computer-use model at half GPT-5.6 Terra's input rate

What this has cost, week by week

Output price at each refresh since 2026-10-29. A vendor change is the provider changing its price. Our correction means this board changed what it prints and the provider's charge did not move — the two are never merged, because publishing the second as the first would be a price rise that never happened.

Nothing has moved since we started tracking it.

Where these numbers came from

• https://developers.openai.com/api/docs/pricing
• https://developers.openai.com/api/docs/models/gpt-6.1-terra
• https://developers.openai.com/api/docs/guides/prompt-caching
• https://developers.openai.com/api/docs/changelog

No number on this page was written that was not read from one of those pages on 2026-10-29. If one is wrong, send us the source URL and it is corrected in the next weekly refresh, with a changelog line saying what was wrong — contact@naderu.com.

Jobs this is one of our picks for

• Computer use — Vision and tools driving a real UI (computer-use)

Discussed in Naderu Weekly

• Priced is not available — 2026-10-29

The rest of the board

This row sits alongside 73 others on the model board, refreshed every week. The same data as JSON, and the terms for using it, are at /board-data.