OpenAI: GPT-5.4 Pro

Reasoning Tool Calling Attachments

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 1

Released Mar 6, 2026

Input Modalities image, pdf, text

Output Modalities text

Tarsk Use coding

Available Providers (1)

Provider	Model ID	Input Cost	Output Cost	Context	Max Output	Docs
Kilo Gateway	`openai/gpt-5.4-pro`	$30.00/MTok	$180.00/MTok	1.1M	128K

Capabilities

Reasoning

Tool Calling

Attachments

Open Weights

Structured Output