Updated

A matte white ceramic disc with a soft amber glow escaping around its edge on a dark background, abstract hero artwork for GPT 5.6 Sol

OpenAI

GPT 5.6 Sol

The GPT-5.6 flagship from OpenAI, with stronger computer use and the first max effort setting.

Chat with GPT 5.6 Sol in Super AgentView pricing

What is GPT 5.6 Sol?

GPT 5.6 Sol is the flagship of OpenAI's GPT-5.6 series, generally available since July 9, 2026.

OpenAI reported state-of-the-art results at launch across coding, knowledge work, cybersecurity and science while using fewer tokens, and the model introduced the max reasoning effort. OpenAI also says it has stronger computer use and design judgment, checking and refining rendered results before it hands work back. Terra and Luna sit below it in the GPT-5.6 lineup, and the GPT-6 series has since followed.

Provider
OpenAI
Context window
1.05M tokens
Input
Text, Image
Reasoning
Off to max
Max output
128K tokens
Knowledge cutoff
Feb 16, 2026
Released
Jul 9, 2026

How GPT 5.6 Sol performs

Published by OpenAI

Results OpenAI reported for GPT 5.6 Sol. Each lab runs its own setup, so compare these with other models only inside the same table.

Benchmark results OpenAI published for GPT 5.6 Sol
BenchmarkScoreSetting
Agents' Last Exam52.7%launch results table
SWE-Bench Pro64.6%
DeepSWE v1.172.7%
Terminal-Bench 2.188.8%
OSWorld 2.062.6%
BrowseComp90.4%
GPQA Diamond94.6%
MMMU Pro83.0%no tools
Toolathlon58.0%
OpenAI MRCR v2, 8 needles73.8%512K to 1M tokens

Source: openai.com

What you can do with GPT 5.6 Sol

  • Top model of the GPT-5.6 series

  • First OpenAI model with a max reasoning effort

  • Inspects and refines rendered results before handing work back, according to OpenAI

  • Six reasoning levels, from off to max

  • Images and text in a 1.05M-token window

How to prompt GPT 5.6 Sol

  • Break technical work into clear steps and ask it to confirm each one.
  • Turn reasoning off for quick questions and raise it for hard ones.
  • If you liked its answers before GPT-6, keep using it; it is still in the featured list.

Where GPT 5.6 Sol fits best

  • Hard reasoning problems

  • Multi-step technical tasks

  • Long problem solving

  • Comparing results against the GPT-6 models

How GPT 5.6 Sol compares

GPT 5.6 Sol compared with other chat models on Flashloop
ModelLMArena textLMArena codingContext windowReasoning
GPT 5.6 Sol1485#211534#171.05M tokensOff to max
Gemini 3.1 Pro Preview1487#191522#321M tokensLow, medium, high
Gemini 3.6 Flash1483#221518#411M tokensLow, medium, high
Kimi K31487#181539#111M tokensOff, low, medium, high, max
Claude Opus 4.81482#251533#181M tokensOff to max

Good to know before you start

  • An earlier generation than the GPT-6 models in Super Agent
  • Answers in text only; visuals in a Super Agent run come from Flashloop's generation models
  • For quick, simple turns, GPT 5.6 Luna or GPT 5.6 Terra is lighter

Start chatting with GPT 5.6 Sol

Chat with GPT 5.6 Sol in Super Agent

  1. Select GPT 5.6 Sol

    Open Super Agent on Flashloop and choose GPT 5.6 Sol in the model picker.

  2. Enter your prompt

    Ask for what you need: an answer, a plan, or the images and videos you want the agent to make.

  3. Send and keep going

    Send the message. GPT 5.6 Sol answers in Super Agent and runs any generations you asked for.

Questions about GPT 5.6 Sol

What is GPT 5.6 Sol?

The flagship of OpenAI's GPT-5.6 series, aimed at coding, knowledge work, cybersecurity and science. It was the first OpenAI model with the max effort setting.

How does GPT 5.6 Sol relate to GPT 5.6 Terra and Luna?

Sol is the top tier. Terra is the balanced middle model and Luna is the fast, low-cost one.

Should I use GPT 5.6 Sol or a GPT-6 model?

The GPT-6 models are OpenAI's newer generation. GPT 5.6 Sol is still in the featured section of the model picker, so you can compare both on your own tasks.

What reasoning levels does GPT 5.6 Sol support?

Off, low, medium, high, extra high and max. Super Agent starts it at low.

More chat models on Flashloop

Browse all models