How much does GPT-5.5 cost?

GPT-5.5 (OpenAI) costs $5 per 1M input tokens and $30 per 1M output tokens, $0.5 cached input. Calculate your cost per request, day and month.

Provider	OpenAI
Input	$5 / 1M tokens
Output	$30 / 1M tokens
Cached input	$0.5 / 1M tokens
Context window	—
Notes	<272K context pricing.
Source	https://platform.openai.com/docs/pricing
Last verified	2026-10-14

Example: a chatbot

1,500 input + 400 output tokens per request, 2,000 requests/day, no caching: $0.02 per request, $39.00 per day, $1170.00 per month (30 days).

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