GPT-5.4

GPT-5.4 is an agent-ready GPT for coding and computer-use workflows at a lower cost, according to OpenAI. It is part of the gpt line, released on 2026-03-05, succeeding GPT-5.3 Chat. It has a context window of 1,050,000 tokens and a maximum output of 128,000 tokens. Weights are not open. It supports reasoning mode and tool calling. It accepts image, PDF, and text inputs, and returns text. Pricing starts at $0.75 per million input tokens and $6.00 per million output tokens, with cached input at $0.075 per million tokens. It is served by 38 hosts.

Against GPT-5.3 Chat: window 128K to 1.05M, input $1.75 to $0.75, output $14.00 to $6.00, cached input $0.175 to $0.075.

Range across the hosts that serve it: up to $5.00 per 1M input tokens.

• ·1,050,000-token context window
• ·128,000-token maximum output
• ·Supports reasoning mode and tool calling
• ·Accepts image, PDF, and text inputs

• Reach for it for coding workflows
• Reach for it for computer-use workflows
• Reach for it for processing long documents
• Reach for it for multimodal input tasks

38 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?

1,050,000 tokens.

What is the price?

From $0.75 per million input tokens and $6.00 per million output tokens. Cached input is $0.075 per million tokens.

Does it support tool calling?

Yes, it supports tool calling and reasoning mode.