openai
OpenAI: GPT-5.5 API Pricing
OpenAI: GPT-5.5 costs $5.00 per 1M input tokens and $30.00 per 1M output tokens (cache reads: $0.500). Context window: 1.1M. Prices verified 2026-08-23 · source
Input / 1M tokens
$5.00
Output / 1M tokens
$30.00
Context window
1.1M
Max output
128K
What would OpenAI: GPT-5.5 cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $160.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $500.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $1050.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $260.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About OpenAI: GPT-5.5
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...