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Chat model · OpenAI

OpenAI GPT 5.4 Mini

Included in Pro · came out March 2026

Fast answers when you have lots of small things to get through

GPT 5.4 Mini is the faster, lighter version of OpenAI's GPT 5.4. It suits days when you have many short jobs: a batch of messages, a list to sort, a few quick questions.

Chat with OpenAI GPT 5.4 Mini

OpenAI GPT 5.4 Mini 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 Mini 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.

Dear [Neighbor’s Name],

Thank you so much for taking such wonderful care of my plants while I was away. I really appreciate your kindness and help—it was such a comfort to know they were in good hands. Please accept this small gift as a token of my gratitude.

Warmly,
[Your Name]

Answered in about 2 seconds · 51 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 mini
  2. December 2025OpenAI GPT 5.2
  3. March 2026OpenAI GPT 5.4
  4. March 2026OpenAI GPT 5.4 MiniYou're here
  5. April 2026OpenAI GPT 5.5
  6. July 2026OpenAI GPT 5.6 Sol
  7. July 2026OpenAI GPT 5.6 Terra

What it's good for

Try it with one of these

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

Thank-you notes for everyone

“Write 6 short thank-you messages for friends who helped at my daughter's wedding: one did the flowers, one drove guests, one baked the cake, one took photos, one did the music and one looked after the kids. Two sentences each, warm, each one different.”

Try this

Sort my chores for the week

“Sort this list of chores into a simple plan for Monday to Saturday, with no more than one hour a day. Here is the list:”

Try this

Describe items for my stall

“I sell homemade jams at a weekend market. Write a one-line description for each: strawberry and vanilla, fig and walnut, bitter orange, plum and cinnamon. Friendly, no exaggeration.”

Try this

Find a train time

“Search the web for the first train on Saturday morning between these two towns, and tell me roughly how long the trip takes:”

Try this

In plain words

GPT 5.4 Mini is a chat assistant from OpenAI. The app describes it as a faster, efficient version of GPT 5.4, made for lots of tasks in a row. Think of it as the model for your to-do list.

It still thinks before it answers on harder questions, reads photos and documents, and can search the web. It just keeps things light and quick.

How to get the most out of it

  1. Ask for several things at once. “Write six notes, each one different” saves you going back and forth.
  2. Give each item a detail. One line about each person or product makes the results less samey.
  3. Keep going in the same chat. “Now make them shorter” or “add a line about the date”.
  4. Switch up when it’s a big job. A long report or a careful letter goes better with a bigger model.

How it compares with its siblings

Its big sibling is GPT 5.4: same version, more careful, a bit slower. Other light OpenAI models are GPT 5 mini, from an earlier version, and GPT 5.6 Luna, from a newer one. GPT 4o mini is simpler still and doesn’t search the web.

When to pick another model

For writing that has to sound like you, try Claude Sonnet 5 or the Help me write tool. For meal planning, see our weekly meal plan guide.

Other models worth a look

OpenAI GPT 5.4

OpenAI

Read the guide

OpenAI GPT 5 mini

OpenAI

Read the guide

OpenAI GPT 5.6 Luna

OpenAI

Read the guide

Frequently asked questions

Is GPT 5.4 Mini as good as GPT 5.4?

It's the lighter version. It's faster and fine for most short jobs. For long or complex tasks, the full GPT 5.4 is more careful.

Does it think before answering?

Yes, on harder questions it takes a moment to think. It's still built to be quick.

Can it search the web?

Yes. It can look things up online when you need recent information.

Can I send photos and PDFs?

Yes. It understands photos and can read documents.

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