Try it here
Cmd+Enter sends
Whatever it says appears here.
Published facts
What the upstream's catalog says about this world, with its price as billed here.
- Input, per 1M tokens
- not published
- Output, per 1M tokens
- not published
- Reads
- text and images
Speed and reliability measured on this gateway join these once this world has served requests through Antimatter.
Price and latency history as JSON: GET /api/planet/history?id=openai/gpt-5.1-chat-latest.
Call it
One OpenAI compatible endpoint, this model's id, and an am_live_ key from the dashboard. Or try it in chat first, no key needed.
curl https://useantimatter.com/v1/chat/completions \
-H "Authorization: Bearer $ANTIMATTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "openai/gpt-5.1-chat-latest", "messages": [{"role": "user", "content": "Hello"}]}'Everything else is in the docs.
Embed this
A badge with this world's live price per million tokens, as billed here, for a README or a site. It links back to this page.
<a href="https://useantimatter.com/planet/openai/gpt-5.1-chat-latest"><img src="https://useantimatter.com/api/badge/price?id=openai%2Fgpt-5.1-chat-latest" alt="gpt-5.1-chat-latest price on Antimatter" height="28"></a>More from OpenAI
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Closest in price and memory, from other vendors.
Head back to the galaxy, or carry this world into a thread.