OpenAI: GPT-5.4 Pro

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.

• Context window: 1,050,000 tokens
• Input: text, image, file
• Output: text
• Pricing: $30/M input tokens, $180/M output tokens

View on OpenRouter. Model data sourced from OpenRouter.