OpenAI: GPT-5.3 Chat vs OpenAI: GPT-5 Pro
OpenAI: GPT-5.3 Chat is cheaper on output tokens, while OpenAI: GPT-5 Pro offers a larger context window. Choose OpenAI: GPT-5.3 Chat or OpenAI: GPT-5 Pro based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | OpenAI: GPT-5.3 Chat | OpenAI: GPT-5 Pro |
|---|---|---|
| Provider | Kilo Gateway | Kilo Gateway |
| Input / 1M tokens | $1.75 | $15.00 |
| Output / 1M tokens | $14.00 | $120.00 |
| Context window | 128K | 400K |
| Parameters | — | — |
| Open weights | No | No |
| Released | Mar 2026 | Oct 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.