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GPT-6.1 Terra

Release Ruler for GPT-6.1 Terra: released Oct 26, 2026, $1 per 1M input tokens, proprietary. Each thin stem on the ruler is another model we track.

GPT-6.1 Terra is OpenAI's latest language model in our dataset, released Oct 26, 2026. Proprietary, API access only. OpenAI's fast, lower-cost GPT-6.1 model for visual reasoning, computer use and writing; the successor to GPT-5.6 Terra, priced at half of GPT-6.1 Sol. Verified against vendor sources on Oct 26, 2026.

Reported Last verified · All models · JSON · Markdown

  • ReleasedOct 26, 2026
  • Context window1.05M1,050,000 tokens
  • Max output128K128,000 tokens
  • LicenceProprietaryProprietary (API)
InTextImageOutText

Key facts

GPT-6.1 Terra: key facts with sources
FactValueSource
VendorOpenAIn/a
ReleasedOct 26, 2026 OpenAI API changelog. The announcement page shows only the year.source
Statusgenerally availablen/a
API idgpt-6.1-terrasource
Context window1,050,000 tokens (1.05M) Maximum input is 922,000 tokens.source
Max output128,000 tokenssource
Inputtext, imagesource
Outputtextsource
LicenceProprietary (API)source
Pricing$1 in / $5 out per 1M tokens Standard processing. Fast mode is 2x; Batch and Flex are 50% lower.source

Where GPT-6.1 Terra sits in our data

How GPT-6.1 Terra differs from GPT-6.1 Sol

Read from the recorded facts of the two models, not from a head-to-head test. We have not run either.

  • Listed price is $1 in and $5 out, against $2 in and $10 out for GPT-6.1 Sol (per 1M tokens).
  • Both list a 1.05M-token context window.
  • Both accept text, image as input.
  • GPT-6.1 Terra came out 27 days after GPT-6.1 Sol.
  • Facts for the other model: GPT-6.1 Sol.

What the sources say

These are claims from the linked pages, not our measurements.

  • Vendor claim (OpenAI): on Agents' Last Exam at medium effort, 15 percentage points above GPT-5.6 Terra at about one-third of the cost. We have not independently measured this.
  • At launch it was available to Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and in the API.

Notes

  • Knowledge cutoff listed: Jun 01, 2026.
  • Reasoning effort supports none, low, medium (default), high, xhigh and max. GPT-6.1 Sol and GPT-6 Astra do not support none.
  • Tool calling requires the Responses API. Fine-tuning is not supported. Audio and video input are not supported.
  • Listed as meeting the Critical threshold in cybersecurity under OpenAI's Preparedness Framework.

What we tested

Nothing yet. We have not run GPT-6.1 Terra ourselves, so every fact on this page is Reported from the sources below. When we do test it, the scope will be stated here and in our test logs. See methodology.

Not verified, left out

We could not confirm these on a vendor page, so we do not state them.

  • Benchmark scores: OpenAI's launch post shows Agents' Last Exam, OSWorld 2.1 and MMMU-Pro results as charts whose values are not in the page text, so none are copied here. The text gives Terminal-Bench 4.0 at 50.3% (max effort), which is OpenAI's own figure.
  • Speed: OpenAI says Terra completes tasks over three times faster than GPT-6 Astra and GPT-6.1 Sol; we found no independent latency measurement, so no speed figure is listed.

Sources

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