GPT-5

GPT-5 is OpenAI's original workhorse model for reasoning, coding, writing, and tool workflows. It is the first version of the gpt line in the registry. It has a context window of 400,000 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 $1.00 per million input tokens and $8.00 per million output tokens, with cached input at $0.104 per million tokens.

First version of its line in the registry.

Range across the hosts that serve it: up to $2.50 per 1M input tokens.

• ·400k token context window
• ·128k token max output
• ·Supports reasoning mode
• ·Supports tool calling
• ·Accepts image and text inputs

• Reach for it for complex reasoning tasks
• Reach for it for coding workflows
• Reach for it for writing tasks
• Reach for it for tool-based workflows

31 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?

The context window is 400,000 tokens.

Does it accept image inputs?

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

What is the price?

Input starts at $1.00 per million tokens, output at $8.00 per million, cached input at $0.104.