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Chat model · OpenAI

OpenAI GPT 6 AstraNew

Included in Pro · came out September 2026

For the hardest questions, when you want the most careful answer

GPT 6 Astra is newer than the GPT 5.6 models in chatmodel, and a step up from them. It suits hard, important questions where a careful answer is worth a little waiting.

Chat with OpenAI GPT 6 Astra See how it compares

OpenAI GPT 6 Astra in numbers

What it knows about

Up to April 2026

It learned from information up to April 2026. For anything newer it can search the web and show you where it found it.

What you can give it

  • Your wordsYes
  • PhotosYes
  • PDFs and filesYes
  • The webYes

Real answers

See how OpenAI GPT 6 Astra answers

We asked it the same everyday questions as every other model in chatmodel, one try each. This is exactly what came back.

My neighbour watered my plants for two weeks while I was away. Write a short, warm thank-you note I can leave with a small gift. Keep it under 80 words.

Thank you so much for looking after my plants while I was away these past two weeks. It was such a comfort knowing they were in good hands! Please enjoy this small gift as a token of my appreciation. I’m lucky to have such a thoughtful neighbour.

Answered in about 15 seconds · 47 words

Ask it yourself

The GPT family in chatmodel

OpenAI GPT 6 Astra is the newest one. Ordered by release date.

  1. March 2026OpenAI GPT 5.4
  2. March 2026OpenAI GPT 5.4 Mini
  3. April 2026OpenAI GPT 5.5
  4. July 2026OpenAI GPT 5.6 Sol
  5. July 2026OpenAI GPT 5.6 Terra
  6. July 2026OpenAI GPT 5.6 Luna
  7. September 2026NewestOpenAI GPT 6 AstraYou're here

What it's good for

Try it with one of these

Press “Try this” and chatmodel opens with OpenAI GPT 6 Astra selected and the message already written. Change any word you like.

Think through early retirement

“I'm 59 and thinking about retiring at 62 instead of 67. Help me think it through: the questions I should answer about money, health and daily life, what information I need to gather, and who I should talk to.”

Try this

Understand an inheritance

“My aunt has died and left me part of her house with two cousins. I'll upload the papers I have. Explain in plain words what our options usually are, what decisions we need to make, and what to ask a lawyer.”

Try this

Write a business plan outline

“I want to open a small café in my town. Write a simple business plan outline with the sections I need, the questions to answer in each one, and the numbers I should work out first.”

Try this

A guide for the house sitter

“Write a clear guide for a friend who is minding our house and dog for two weeks: feeding and walks, plants, bins, the alarm, who to call in an emergency. Leave blanks where I need to fill in details.”

Try this

In plain words

GPT 6 Astra is a chat assistant from OpenAI, the company behind ChatGPT. Its version number comes after the GPT 5.6 line, and it’s a step up from those models.

It thinks before it answers, which makes it slower than lighter models, but more careful with details. It reads photos and documents and can search the web.

How to get the most out of it

  1. Save it for the hard stuff. Big decisions, long paperwork, research you’d otherwise spend an evening on.
  2. Give it everything. Upload the papers, list what you know and what worries you.
  3. Ask what it’s unsure about. “Tell me what you’d want to double-check” helps you spot weak points.
  4. Ask for a plan, not just an answer. “What should I do first, second and third?”

How it compares with its siblings

Below it, GPT 5.5 and GPT 5.4 are also capable and a bit quicker. The GPT 5.6 line offers Sol and Terra for everyday bigger jobs, and Luna for quick ones.

When to pick another model

For writing where the tone really matters, compare with Claude Opus 5, and see ChatGPT vs Claude. For quick questions, Instant picks a model for you.

How it compares

GPT 6 Astra vs Claude Fable 5.1: OpenAI and Anthropic, head to head OpenAI's GPT 6 Astra against Anthropic's Claude Fable 5.1 on the same 8 everyday tasks. See both real answers, the winner of each round and which to pick. GPT 6 Astra vs GPT 5.5: is it worth switching? Is GPT 6 Astra worth switching to from GPT 5.5? We gave both the same 8 everyday tasks: see the real answers side by side, who won each and which to use.

Other models worth a look

OpenAI GPT 5.5

OpenAI

Read the guide

OpenAI GPT 5.6 Sol

OpenAI

Read the guide

OpenAI GPT 5.4

OpenAI

Read the guide

Frequently asked questions

Is GPT 6 Astra better than the GPT 5.6 models?

For hard questions, it's a step up from them. It's also slower than the lighter ones, so it's best kept for hard or important questions.

Should I use it for everything?

You can, but for quick everyday questions a lighter model gives a good answer with less waiting.

Can it search the web?

Yes. It can look things up online and bring several sources together.

Can it read documents?

Yes. It reads PDFs and understands photos.

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