GPT-5 Pro vs gpt-oss-20b
gpt-oss-20b is cheaper on output tokens, while GPT-5 Pro offers a larger context window. Choose GPT-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 Pro | gpt-oss-20b |
|---|---|---|
| Provider | OpenRouter | OpenRouter |
| Input / 1M tokens | $15.00 | $0.03 |
| Output / 1M tokens | $120.00 | $0.14 |
| Context window | 400K | 131K |
| Parameters | — | 21B |
| Open weights | No | Yes |
| Released | Oct 2025 | Aug 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.