gpt-5-nano

Name: gpt-5-nano
Brand: openai
SKU: openai/gpt-5-nano
Price: 0.055 USD
Availability: InStock

openai/gpt-5-nano

$0.055 in · $0.44 out per 1M tokens400k context

about 0.02¢ a message

A typical message: about 500 tokens you send and 500 it writes.

Chat with gpt-5-nano

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Also:batch

Spec sheet

Published facts from the catalog, billed prices and what we measured here. Anything not measured says so.

Price, billed here

Input, per 1M tokens: $0.055provider $0.05
Output, per 1M tokens: $0.44provider $0.40
Cached input, per 1M: $0.0055provider $0.005
Margin: +10%

Context and formats

Context window: 400,000 tokens
Longest answer: not published
Reads: text and images
Makes: text

Measured here, last 7 days

First token, median: not measured
Answered without error: not measured

Tools and JSON

Tool calling: not declared
JSON output: not declared

Price and latency history as JSON: GET /api/planet/history?id=openai/gpt-5-nano.

Try it here

Cmd+Enter sends

The answer appears here.

Measured here

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Call it

Use one OpenAI compatible endpoint, this model's id and an am_live_ key from the dashboard. You can also try it in chat first with no key.

curl https://useantimatter.com/v1/chat/completions \
  -H "Authorization: Bearer $ANTIMATTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "openai/gpt-5-nano", "messages": [{"role": "user", "content": "Hello"}]}'

Everything else is in the docs.

Embed this

A badge showing this model'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-nano"><img src="https://useantimatter.com/api/badge/price?id=openai%2Fgpt-5-nano" alt="gpt-5-nano price on Antimatter" height="28"></a>

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