GPT-5.4 Pro

OpenAI

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.

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Capabilities

Thinking

Tool Use

Image Input

Image Generation

PDF Input

Example Use Cases

Hardest problem requiring maximum intelligence

Correctness matters more than speed or cost

Novel research problem stumping other models

Technical Specifications

Context Window

1,050,000 tokens

Max Output

128,000 tokens

Pricing

Token Costs (per 1M tokens)

Cache Miss Input

$30

Non-Reasoning Output

$180

Tool Costs (per 1K calls)

Web Search

$10

Code Execution

$0.19

Image Generation

$400