OpenAI: GPT-5.5 Pro

Pricing, context window and lifecycle for openai/gpt-5.5-pro, tracked from what the vendor publishes.

Price per million tokens

Facts

Supported parameters

include_reasoning, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools

Other OpenAI models

• openai/gpt-3.5-turbo $0.500 in / $1.50 out
• openai/gpt-3.5-turbo-0613 $1.00 in / $2.00 out
• openai/gpt-3.5-turbo-16k $3.00 in / $4.00 out
• openai/gpt-3.5-turbo-instruct $1.50 in / $2.00 out
• openai/gpt-4 $30.00 in / $60.00 out
• openai/gpt-4-turbo $10.00 in / $30.00 out
• openai/gpt-4-turbo-preview $10.00 in / $30.00 out
• openai/gpt-4.1 $2.00 in / $8.00 out
• openai/gpt-4.1-mini $0.400 in / $1.60 out
• openai/gpt-4.1-nano $0.100 in / $0.400 out