GPT-5.5

OpenAI · GPT-5.5

Released

Apr 23, 2026

Context window

1,050,000 tokens

Max output

128,000 tokens

Input price

$5.00 / 1M

Output price

$30.00 / 1M

Knowledge cutoff

Dec 2025

API identifier

gpt-5.5

Provider: openai

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