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The basics

Released

Jul 9
Jun 29

What it does

Text and chat: Writes, answers questions and holds a conversation.Thinks first: Can reason step by step before it answers: slower, but better at maths, code and tricky questions.Sees images: Understands pictures, screenshots and charts you share with it.Reads files: Reads documents such as PDFs.
Text and chat: Writes, answers questions and holds a conversation.Thinks first: Can reason step by step before it answers: slower, but better at maths, code and tricky questions.

Knowledge cutoff

The latest events it learned about

February 2026
Not published

Download

No: it runs on the maker's servers
FreeOpen weights

Where to use it

OpenAI's app: ChatGPT ↗Also for developers, through an API
No app known; download it instead

Price and limits, for developers

Input

Per million tokens

$4.00
$0.30Cheaper

Output

Per million tokens

$20.00
$1.20Cheaper

Cached input

Per million tokens

$0.40
$0.006Cheaper

Context window

How much it takes in at once

1.05M tokens about 790,000 wordsBigger
1.05M tokens about 790,000 words

Longest answer

128K tokens about 96,000 words
262K tokens about 200,000 wordsLonger

How they score

Combined test score

Epoch Capabilities Index · Epoch AI

163#12 of 237
Not ranked

Only GPT-5.6 Sol is in this ranking.

Chat answers, by people's votes

LMArena text, adjusted for style · LMArena

1,485#19 of 86
Not ranked

Only GPT-5.6 Sol is in this ranking, which lists the most-voted models.

Building apps, by people's votes

LMArena WebDev · LMArena

1,615#28 of 85
Not ranked

Only GPT-5.6 Sol is in this ranking, which lists the most-voted models.

Green marks the better of the two on each row, red the other. Rows where one side isn't listed, or where the gap is too close to call, stay plain.

Popular comparisons

Not sure where to start? Which AI should I use? gives a pick for what you want to do. How to read AI rankings explains the numbers.

Rankings from LMArena and Epoch AI, both CC BY 4.0, updated . Developer prices, context windows and knowledge cutoffs from the labs' own listings on models.dev and from OpenRouter. The app links go to each maker's own app when no source says exactly where the model is available.

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