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Text Generation Model

GPT 5.5

OpenAI's most capable and efficient frontier model for professional work, combining powerful reasoning with reliable agentic execution at scale.

PublisherOpenAI
TypeText
Context Window1,000,000 tokens
Training DataApril 2026
Input$5.00/MTok
Output$30.00/MTok
LATEST

GPT 5.5

GPT-5.5 raises the baseline for complex production workflows. It’s a strong fit for coding use cases, tool-heavy agents, grounded assistants, long-context retrieval, product-spec-to-plan workflows, and customer-facing workflows where execution quality and response polish are critical.

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Parameters & options

Max Temperature2
Max Response Size128,000 tokens
Reasoning EffortSelect
Default: medium
NoneLowMediumHighExtra High

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No API keys required. Create AI-powered workflows with GPT 5.5 in minutes — free.