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GPT-5.4

OpenAIlegacyreasoning-llmGPT-5

Snapshot gpt-5.4-2026-03-05. Variants gpt-5.4-pro ($30/$180), gpt-5.4-mini ($0.75/$4.50), gpt-5.4-nano ($0.20/$1.25) are also on the pricing page and OpenRouter.

Context window
1,050,000 tokens
Max output
128,000 tokens
Knowledge cutoff
2025-08
Input
text, image
Output
text
License
proprietary
Pricing
input: $2.5 · cached input: $0.25 · output: $15 · unit note: prompts >272K input tokens billed 2x input / 1.5x output (per 1M tokens (USD), standard tier) source
Verified
2026-09-29

How to call it

ProviderModel idEndpoint / URLDocs
OpenAI APIgpt-5.4https://api.openai.com/v1/responsesdocs
Azure OpenAI (Microsoft Foundry)gpt-5.4—docs
OpenRouteropenai/gpt-5.4openrouter.ai/openai/gpt-5.4—
Web app—chatgpt.com—

Notable capabilities (2)

curl https://api.openai.com/v1/responses \
 -H "Authorization: Bearer $OPENAI_API_KEY" -H "Content-Type: application/json" \
 -d '{"model":"gpt-5.4","input":"Hello"}'

Sources:

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