GPT-5.4 Pro

GPT-5.4 Pro is a model from OpenAI for demanding professional reasoning and agent tasks. It is part of the gpt-pro line, released on 2026-03-05, succeeding GPT-5.2 Pro. It has a context window of 1,050,000 tokens and a maximum output of 128,000 tokens. It accepts image and text inputs and returns text. It supports reasoning mode and tool calling. The weights are not open. Pricing starts at $24.00 per million input tokens and $144.00 per million output tokens, with cached input at $3.00 per million tokens.

Against GPT-5.2 Pro: window 400K to 1.05M, input $18.90 to $24.00, output $150.00 to $144.00.

Range across the hosts that serve it: up to $45.00 per 1M input tokens.

• ·1.05M token context window for long documents
• ·128K token maximum output length
• ·Supports reasoning mode and tool calling
• ·Accepts both image and text inputs
• ·Knowledge cutoff August 2025

• Reach for it for complex reasoning and agent workflows
• Reach for it for processing very long context inputs
• Reach for it for multimodal tasks combining image and text

18 hosts serve this model at the price above · the maker's documentation

The registry keeps the six most recent versions of a line. Older ones stay in the file and can be surfaced without a rebuild.

What is the context window size?

The context window is 1,050,000 tokens, and the maximum output is 128,000 tokens.

Does it support image inputs?

Yes, it accepts both image and text inputs, and returns text output.

What is the pricing?

Input costs from $24.00 per million tokens, output from $144.00 per million tokens, and cached input from $3.00 per million tokens.