GPT-5.5 Pro vs GPT OSS 20B
GPT OSS 20B is cheaper on output tokens, while GPT-5.5 Pro offers a larger context window. Choose GPT-5.5 Pro or GPT OSS 20B based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.5 Pro | GPT OSS 20B |
|---|---|---|
| Provider | Impossibl | Impossibl |
| Input / 1M tokens | $30.00 | $0.08 |
| Output / 1M tokens | $180.00 | $0.30 |
| Context window | 1.1M | 131K |
| Parameters | — | — |
| Open weights | No | Yes |
| Released | Apr 2026 | Aug 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.