GPT-5.1 vs GPT OSS 20B
GPT OSS 20B is cheaper on output tokens, while GPT-5.1 offers a larger context window. Choose GPT-5.1 or GPT OSS 20B based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.1 | GPT OSS 20B |
|---|---|---|
| Provider | Cloudflare AI Gateway | Cloudflare AI Gateway |
| Input / 1M tokens | $1.25 | $0.20 |
| Output / 1M tokens | $10.00 | $0.30 |
| Context window | 400K | 128K |
| Parameters | — | 21B |
| Open weights | No | No |
| Released | Nov 2025 | Aug 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.