GPT-5.5 is a flagship model for the most complex professional work. Learn more in our GPT-5.5 model guidance. Reasoning.effort supports: none, low, medium (default), high and xhigh.
| Input | Output | Cached input | 30m write | 12h write | |
|---|---|---|---|---|---|
| Standard | $5 | $30 | $0.5 | — | — |
| Batch | $2.5 | $15 | $0.25 | — | — |
| Fast | $12.5 | $75 | $1.25 | — | — |
/v1/models/amazon/openai.gpt-5.5