OpenAI: GPT-5.4 Pro

openai/gpt-5.4-pro

Released Mar 5, 20261,050,000 context

$30/M input tokens$180/M output tokens$10/K web search

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.

Providers for GPT-5.4 Pro

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for GPT-5.4 Pro

Compare different providers across OpenRouter

Effective Pricing for GPT-5.4 Pro

Actual cost per million tokens across providers over the past hour

Apps using GPT-5.4 Pro

Top public apps this month

Recent activity on GPT-5.4 Pro

Total usage per day on OpenRouter

Prompt

963M

Reasoning

25.6M

Completion

6.17M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.

Uptime stats for GPT-5.4 Pro

Uptime stats for GPT-5.4 Pro across all providers

Sample code and API for GPT-5.4 Pro

OpenRouter normalizes requests and responses across providers for you.

OpenRouter supports reasoning-enabled models that can show their step-by-step thinking process. Use the reasoning parameter in your request to enable reasoning, and access the reasoning_details array in the response to see the model's internal reasoning before the final answer. When continuing a conversation, preserve the complete reasoning_details when passing messages back to the model so it can continue reasoning from where it left off. Learn more about reasoning tokens.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

GPT-5.4 Pro - API Pricing & Providers | OpenRouter