OpenAI · llm model

GPT-5.6 Sol

GPT-5.6 Sol is an OpenAI language model released Jul 9, 2026; OpenAI's newest language model in our dataset is GPT-6.1 Terra. Proprietary, API access only. OpenAI's GPT-5.6 flagship, released Jul 9, 2026 with a 1.05M-token context. Verified against vendor sources on Oct 26, 2026.

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

ReleasedJul 9, 2026
Context window1.05M1,050,000 tokens
Max output128K128,000 tokens
LicenceProprietaryProprietary (API)

InTextImageOutText

Key facts

GPT-5.6 Sol: key facts with sources
Fact	Value	Source
Vendor	OpenAI	n/a
Released	Jul 9, 2026	source
Status	generally available	n/a
API id	gpt-5.6-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	$4 in / $20 out per 1M tokens	source

Where GPT-5.6 Sol sits in our data

Released Jul 9, 2026 (week 28 of 2026), in July 2026. Other models in our data released that month: Gemini Robotics ER 2, GPT-Live-Transcribe, GPT-Transcribe, Claude Opus 5, Gemini 3.5 Flash-Lite, Gemini 3.6 Flash.
The previous OpenAI model we track is GPT-Realtime-2.1 mini (Jul 6, 2026), 3 days earlier.
Of the 60 models in our data with a published context window, GPT-5.6 Sol has the number 6 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-5.6 Sol differs from GPT-5.6 Luna

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

Listed price is $4 in and $20 out, against $0.2 in and $1.2 out for GPT-5.6 Luna (per 1M tokens).
Both list a 1.05M-token context window.
Both accept text, image as input.
Both were released on Jul 9, 2026.
Facts for the other model: GPT-5.6 Luna.

What we tested

Nothing yet. We have not run GPT-5.6 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.

Not verified, left out

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

OpenAI lists promotional pricing for GPT-5.6 Sol through at least Nov 21, 2026.