o3
OpenAI is retiring this model on 11 December 2026. After that date it stops answering, so it's not a good choice for new work.
Reasoning model for complex tasks, succeeded by GPT-5
Private by design
When you use o3 in Polymeti, your browser sends the message to OpenAI directly, with your own API key. Nothing passes through a Polymeti server.
- We never see your conversation.
- Your API key is stored in your browser, not on our servers.
- Your chat history lives on your device. Back it up to your own Google Drive if you want it on more than one.
What it can do
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Context window
200,000 tokens
≈ 150,000 words · about 600 pages
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Max output
100,000 tokens
≈ 75,000 words in a single answer
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Knowledge cutoff
June 2024
its training cutoff
- Reads images you attach
- Uses tools
Modalities
- Text Input and output
- Image Input only
- Audio Not supported
- Video Not supported
Reasoning effort
Features
- Streaming Supported
- Function calling Supported
- Structured outputs Supported
- Fine-tuning Not supported
Ready to try it?
Polymeti is currently invite-only.
Sign inBring your own API key · Your chats stay in your browser