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.

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.

Recent activity on GPT-5.4 Pro

Total usage per day on OpenRouter

Prompt

103M

Reasoning

9.18M

Completion

2.47M

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