GPT 5.4

gpt-5.4 · OpenAI

GPT-5.4 is our frontier model for complex professional work.Reasoning.effort supports: none (default), low, medium, high and xhigh.

API Pricing

Input$2.5 / 1M tokens
Output$15 / 1M tokens
Cache read$0.25 / 1M tokens

Specifications

Context1.05M tokens
Max output128K tokens
Modalitiestext, image
CapabilitiesThinking, Streaming, Tool calling, Web search, Code interpreter, Computer use, File search, Structured outputs, Prompt caching, Server-side sessions
Endpointschat_completions, responses, claude_api

Frequently asked questions

What is GPT 5.4?

GPT-5.4 is our frontier model for complex professional work.Reasoning.effort supports: none (default), low, medium, high and xhigh.

What is the context length of GPT 5.4?

GPT 5.4 has a 1,050,000 token context window. It supports up to 128,000 output tokens.

How much does GPT 5.4 cost?

On AIHubMix, GPT 5.4 costs $2.5 per million input tokens and $15 per million output tokens. Cached input reads are billed at $0.25 per million tokens.

What modalities does GPT 5.4 support?

GPT 5.4 accepts text and image input.

What capabilities does GPT 5.4 support?

GPT 5.4 supports thinking, function calling, structured outputs, web search and tool calling. Per-protocol parameter support is listed in the capability table on this page.

How do I call GPT 5.4 via API?

GPT 5.4 is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to gpt-5.4 — no other code changes needed.

Who created GPT 5.4?

GPT 5.4 is developed by OpenAI. AIHubMix aggregates it alongside models from other providers behind one API and one bill.

When was GPT 5.4 released?

GPT 5.4 was released on March 5, 2026 by OpenAI.

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Use GPT 5.4 via the AIHubMix unified API — one interface for every major LLM.