Head to head
GPT-5.5 Pro vs o1
On a blended workload of one million input tokens and three million output tokens, o1 is 2.9× cheaper than GPT-5.5 Pro.
| GPT-5.5 Pro | o1 | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input / MTok | $30 | $15 |
| Output / MTok | $180 | $60 |
| Cache read / MTok | — | $7.5 |
| Context window | — | 200,000 |
| Blended 1M in + 3M out | $570.00 | $195.00 |
| Status | ga | ga |