Model by OpenAI

GPT-6.1 Terra Pro

GPT-6.1 Terra Pro is OpenAI's Terra model run in pro reasoning mode.

Checked 2026-11-05

GPT-6.1 Terra Pro is OpenAI's Terra model run in pro reasoning mode. OpenRouter describes it as the same underlying model as GPT-6.1 Terra, served with reasoning.mode set to pro for better answers on hard tasks. It was listed on 26 October 2026. The context window is 1,050,000 tokens. It takes text, images and files and returns text only. OpenRouter's headline price is $1 per million input tokens and $5 per million output tokens, checked on 5 November 2026. Some providers on the page charge more, up to $2 and $10, so look at the route you pick. It is a closed model; no downloadable weights are listed. The limit is cost: OpenRouter's own note warns that pro mode spends far more tokens on reasoning, so the real bill can sit well above the sticker rate. We would try it on tricky review or planning jobs and keep plain Terra for routine calls. You reach it through the OpenAI API, Azure, or OpenRouter. Figures come from OpenRouter's public model list and the model page. We have not run it ourselves.

Mentioned here

Questions

What is the context window of GPT-6.1 Terra Pro?

1,050,000 tokens, with up to 128,000 tokens of output.

How much does GPT-6.1 Terra Pro cost?

$1 per million input tokens and $5 per million output tokens, checked 31 October 2026.

Can I run GPT-6.1 Terra Pro on my own hardware?

No. The weights are not published, so you use it through the maker's API or a hosting provider.

Who makes GPT-6.1 Terra Pro?

OpenAI makes it, and released it on 26 October 2026.

Reviews

Loading reviews…

Write a review

Your rating

Up to 1000 characters. Stars alone are enough.

Similar

  • GPT-4.1

    GPT-4.1 is OpenAI's April 2025 non-reasoning model, built for instruction following and long-context code work, and it is now deprecated.

    • Closed

    OpenAI, 1M context, $2 in / 1M

  • o3

    o3 is OpenAI's April 2025 reasoning model, and it is now deprecated, so it suits only code that still calls it.

    • Closed

    OpenAI, 200K context, $2 in / 1M

  • gpt-oss-20b

    gpt-oss-20b is OpenAI's smaller open-weights model, suited to running a reasoning model on your own machine or paying very little through an API.

    • Open weights

    OpenAI, 131K context, $0.03 in / 1M

  • GPT-5.4 Nano

    GPT-5.4 Nano was OpenAI's cheapest GPT-5.4 model, built for speed-critical, high-volume jobs, and it is now deprecated.

    • Closed

    OpenAI, 400K context, $0.20 in / 1M

  • GPT-5.4 Mini

    GPT-5.4 Mini is OpenAI's smaller GPT-5.4 model, aimed at high-throughput coding and reasoning work where the full model costs too much.

    • Closed

    OpenAI, 400K context, $0.75 in / 1M

  • GPT-5.4

    GPT-5.4 is an earlier OpenAI frontier model, and it suits teams already on the OpenAI API who need a very long context for coding and document work.

    • Closed

    OpenAI, 1.1M context, $2.50 in / 1M