openai
OpenAI: GPT-5.5 Pro API Pricing
OpenAI: GPT-5.5 Pro costs $30.00 per 1M input tokens and $180.00 per 1M output tokens. Context window: 1.1M. Prices verified 2026-08-23 · source
Input / 1M tokens
$30.00
Output / 1M tokens
$180.00
Context window
1.1M
Max output
128K
What would OpenAI: GPT-5.5 Pro cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $960.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $3000.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $6300.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $1560.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About OpenAI: GPT-5.5 Pro
GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...