Models › OpenAI
OpenAI API pricing
GPT-5.5.
$5.00 in. $30.00 out.
Input / 1M$5.00
Cached input / 1M$0.50
Output / 1M$30.00
Context—
Price for prompts under 272K tokens; longer prompts bill at $10 in / $45 out.
Source: OpenAI official pricing · checked Oct 20, 2026 · context window not listed on the pricing page
What it costs per month.
1,000 input and 500 output tokens per request, no caching.
| Volume | Monthly cost |
|---|---|
| 1K requests | $20.00 |
| 100K requests | $2,000.00 |
| 1M requests | $20,000.00 |
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