OpenAI · llm model

GPT-6.1 Sol

GPT-6.1 Sol is an OpenAI language model released Sep 29, 2026; OpenAI's newest language model in our dataset is GPT-6.1 Terra. Proprietary, API access only. OpenAI's near-flagship GPT-6.1 model: OpenAI says it performs close to GPT-6 Astra at a fifth of Astra's price. Verified against vendor sources on Oct 26, 2026.

Reported Last verified Oct 26, 2026 · All models · JSON · Markdown

ReleasedSep 29, 2026
Context window1.05M1,050,000 tokens
Max output128K128,000 tokens
LicenceProprietaryProprietary (API)

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Key facts

GPT-6.1 Sol: key facts with sources
Fact	Value	Source
Vendor	OpenAI	n/a
Released	Sep 29, 2026	source
Status	generally available	n/a
API id	gpt-6.1-sol	source
Context window	1,050,000 tokens (1.05M)	source
Max output	128,000 tokens	source
Input	text, image	source
Output	text	source
Licence	Proprietary (API)	source
Pricing	$2 in / $10 out per 1M tokens	source

Where GPT-6.1 Sol sits in our data

Released Sep 29, 2026 (week 40 of 2026), in September 2026. Other models in our data released that month: Claude Sonnet 5.5, Claude Opus 5.5, Gemini 3.8 Flash TTS, Gemini 3.8 Flash-Lite TTS, GPT-6 Luna, GPT-6 Sol.
The previous OpenAI model we track is GPT-6 Sol (Sep 22, 2026), 7 days earlier.
Of the 60 models in our data with a published context window, GPT-6.1 Sol has the number 2 largest (1.05M tokens). Our data is not every model on the market.
OpenAI tools we cover: Codex CLI, ChatGPT, OpenAI Agents SDK.
All releases by date: AI model releases by month · new AI models this week. Choosing for code: best LLM for coding.

How GPT-6.1 Sol differs from GPT-6 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 the same as GPT-6 Sol: $2 in and $10 out (per 1M tokens).
GPT-6.1 Sol lists a 1.05M-token context window; we have none recorded for GPT-6 Sol.
Both accept text, image as input.
GPT-6.1 Sol came out 7 days after GPT-6 Sol.
Facts for the other model: GPT-6 Sol.

What the sources say

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

Vendor claim (OpenAI): near-Astra performance at one fifth of Astra's price. We have not independently measured this.

Notes

At launch it was available in ChatGPT Work and Codex, not yet in ChatGPT Chat. Knowledge cutoff listed: Apr 30, 2026.

What we tested

Nothing yet. We have not run GPT-6.1 Sol 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.