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Chat model · OpenAI

OpenAI GPT 5.4

Included in Pro · came out March 2026

For bigger jobs: research, long reports and plans with many parts

GPT 5.4 is one of OpenAI's more capable models in chatmodel. It suits jobs that take several steps, like looking into a topic, reading a long report or building a detailed plan.

Chat with OpenAI GPT 5.4

OpenAI GPT 5.4 in numbers

What it knows about

Up to August 2025

It learned from information up to August 2025. 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 5.4 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 watering my plants while I was away. It gave me such peace of mind knowing they were in such caring hands. I really appreciate your kindness and thoughtfulness. Please enjoy this small gift as a token of my thanks!

Answered in about 2 seconds · 44 words

Ask it yourself

The GPT family in chatmodel

The newest is OpenAI GPT 6 Astra. Ordered by release date.

  1. August 2025OpenAI GPT 5
  2. August 2025OpenAI GPT 5 mini
  3. December 2025OpenAI GPT 5.2
  4. March 2026OpenAI GPT 5.4You're here
  5. March 2026OpenAI GPT 5.4 Mini
  6. April 2026OpenAI GPT 5.5
  7. July 2026OpenAI GPT 5.6 Sol

What it's good for

Try it with one of these

Press “Try this” and chatmodel opens with OpenAI GPT 5.4 selected and the message already written. Change any word you like.

Research a care home

“I'm looking for a care home for my father, who has early dementia. Search the web and tell me what questions I should ask on a visit, what to look out for, and what help might be available. We live in:”

Try this

Read a pension statement

“I'll upload my pension statement. Tell me in plain words how much I have, what I can expect when I retire, and any choices or deadlines mentioned.”

Try this

Plan a kitchen renovation

“We want to renovate our kitchen over the summer. Make a plan with the order of the work, who to hire for each part, what to decide early, and how to keep cooking while it's being done.”

Try this

Letter to a supplier

“I run a small bakery. Write a polite but firm letter to my flour supplier: the last two deliveries were late, and I need to know if they can deliver on time from now on or I'll look elsewhere.”

Try this

In plain words

GPT 5.4 is a chat assistant from OpenAI. The app describes it as OpenAI’s general-purpose model for complex tasks. In plain words, it’s the one to pick when a job has several steps: search, read, compare, then write it up.

It thinks before it answers, reads photos and documents, and can search the web. That makes it slower than light models, and more careful.

How to get the most out of it

  1. Describe the goal, not just the question. “I need to choose a care home in the next month” helps it plan the answer.
  2. Ask it to search first, then summarize. It can bring several sources together.
  3. Upload the full document. It handles long texts well.
  4. Ask for a short version at the end. “Finish with three things I should do this week.”

How it compares with its siblings

GPT 5.4 Mini is the quicker version of the same model. GPT 5.2 came before it, and GPT 5.5 after. For a newer, more capable OpenAI option, see GPT 6 Astra.

When to pick another model

For letters where the tone matters, many people prefer Claude Opus 5. To question a single PDF, the PDF chat tool is the quickest route.

Other models worth a look

OpenAI GPT 5.4 Mini

OpenAI

Read the guide

OpenAI GPT 5.5

OpenAI

Read the guide

OpenAI GPT 5.2

OpenAI

Read the guide

Frequently asked questions

What's the difference between GPT 5.4 and GPT 5.4 Mini?

They're the same version in two sizes. GPT 5.4 is the bigger, more careful one for complex jobs. GPT 5.4 Mini is faster and fine for everyday questions.

GPT 5.4 or GPT 5.5?

GPT 5.5 is the newer version. Both are among the more capable OpenAI models in chatmodel, so try the same message on both if you're unsure.

Can it search the internet?

Yes. It can look things up online and bring the results together.

Can it read long documents?

Yes. You can upload PDFs and photos and ask questions about them.

All of these models, in one place

Chat, images, video and tools with the best AI models. Switch between them whenever you want.

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