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What the numbers mean

Context window512,000 tokens

How much the model can read in one request, counting your prompt, any files and the conversation so far. That is about 380,000 words, or 768 pages.

Max output460,800 tokens

The longest single reply it can write: about 350,000 words.

Input priceFree

What you pay for everything the model reads. A 1,000-word prompt costs nothing.

Output priceFree

What you pay for everything the model writes. Output usually costs more than input. A 500-word answer costs nothing.

Modalitiestext, image in, text out

The kinds of content it accepts and the kinds it produces. A model that takes images in can read a screenshot; one that only puts text out cannot draw.

Supported parameters

The settings you can pass with a request. A model that lists tools can call functions; one that lists structured_outputs can be held to a JSON schema.

• include_reasoning
• max_tokens
• reasoning
• response_format
• structured_outputs
• temperature
• tool_choice
• tools
• top_p