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OpenAI: GPT-5.4 Pro

openai/gpt-5.4-pro

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GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs. Optimized for step-by-step reasoning, instruction following, and accuracy, GPT-5.4 Pro excels at agentic coding, long-context workflows, and multi-step problem solving.

Modalities

In / Out Price

$30 / $180per 1M

Context

1M

Released

Mar 5, 2026

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About OpenAI: GPT-5.4 Pro

OpenRouter makes OpenAI: GPT-5.4 Pro available through a unified, OpenAI-compatible API using the model ID openai/gpt-5.4-pro. Requests can be routed across 2 providers, including OpenAI and Azure, with automatic failover when an endpoint is unavailable.

OpenAI: GPT-5.4 Pro accepts text, images and files such as PDFs and returns text. It has a 1,050,000-token context window and a maximum output of 128,000 tokens.

On OpenRouter, OpenAI: GPT-5.4 Pro costs $30.00/M input tokens and $180.00/M output tokens, with separate rates for Web Search at $10.00/1K calls. It was released on March 5, 2026.

More models from OpenAI

  • GPT Transcribe
  • GPT-5.6 Luna Pro
  • GPT-5.6 Luna

Frequently asked questions

GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs.

GPT-5.4 Pro costs $30.00/M input tokens and $180.00/M output tokens, with separate rates for Web Search at $10.00/1K calls.

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

Yes. GPT-5.4 Pro accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

GPT-5.4 Pro accepts text, images and files such as PDFs as input and returns text.

GPT-5.4 Pro is served by 2 providers on OpenRouter: OpenAI and Azure. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

GPT-5.4 Pro was released on March 5, 2026.