GPT-5.5 Pro vs GPT-5.4 Pro
GPT-5.5 Pro is the cheaper option on input; GPT-5.5 Pro is cheaper on output. Figures below are per million tokens, from vendor pricing cited in our reporting.
| GPT-5.5 Pro | GPT-5.4 Pro | |
|---|---|---|
| Input per 1M tokens | $30 | $30 |
| Output per 1M tokens | $180 | $180 |
| Cached input per 1M | — | — |
| Context window | 1.05M tokens | 1.05M tokens |
| Parameters | — | — |
| Licence | ||
| Benchmark | — | — |
| Vendor | OpenAI | OpenAI |
| Released | — | — |
What the numbers say
- Input price gap: 0% ($30 vs $30).
- Blended three-to-one input/output rate: $270.00 for GPT-5.5 Pro, $270.00 for GPT-5.4 Pro.
- Context: 1.05M tokens against 1.05M tokens.
- Licence: GPT-5.5 Pro is ; GPT-5.4 Pro is .