OpenAI model
GPT-5.5 Pro API cost calculator
GPT-5.5 Pro costs $30 per 1M input tokens and $180 per 1M output tokens on the OpenAI API, with a 1.1M-token context window. A typical request (2K input, 500 output tokens) costs $0.15 — about $4,500/month at 1,000 requests per day. Use the calculator below to model your exact workload.
Find me a cheaper modelWhat real workloads cost on GPT-5.5 Pro
| Workload | Tokens (in / out) | Per request | Per 1K requests |
|---|---|---|---|
| Chatbot message | 500 / 300 | $0.07 | $69.00 |
| RAG query with context | 4,000 / 500 | $0.21 | $210 |
| Document summarization | 20,000 / 1,000 | $0.78 | $780 |
| Agent coding session | 100,000 / 5,000 | $3.90 | $3,900 |
GPT-5.5 Pro vs other OpenAI models
| Model | Input /1M | Output /1M | Context |
|---|---|---|---|
| GPT-5.5 Pro | $30 | $180 | 1.1M |
| GPT-5.6 Luna Pro | $0.20 | $1.20 | 1.1M |
| GPT-5.6 Luna | $0.20 | $1.20 | 1.1M |
| GPT-5.6 Terra Pro | $2 | $12 | 1.1M |
| GPT-5.6 Terra | $2 | $12 | 1.1M |
Frequently asked questions
How much does GPT-5.5 Pro cost per 1M tokens?
According to current pricing data, GPT-5.5 Pro costs $30 per 1M input tokens and $180 per 1M output tokens. Processing 1M tokens each way costs $210.
What does a typical API request to GPT-5.5 Pro cost?
A typical request with 2,000 input tokens and 500 output tokens costs $0.15. At 1,000 requests per day that is $150 daily, or about $4,500 per month.
What is GPT-5.5 Pro's context window?
GPT-5.5 Pro supports a 1.1M-token context window (1,050,000 tokens).
Does GPT-5.5 Pro support prompt caching?
No cache-read pricing is published for GPT-5.5 Pro, so every input token is billed at the full $30 per 1M rate.
What is a cheaper alternative to GPT-5.5 Pro?
Ling-2.6-flash from Inclusionai is currently the cheapest comparable option at $0.01 per 1M input tokens versus $30 for GPT-5.5 Pro — roughly 3000x cheaper on input.
Prices may differ from OpenAI's official pricing page for batch, tiered, or fine-tuned usage. Compare all current prices on the live model pricing dashboard, see GPT-5.5 Pro vs Ling-2.6-flash pricing, or run GPT-5.5 Pro head-to-head against other models in the side-by-side comparison playground.
Pricing data via the OpenRouter models API.