GPT-5.3 Codex vs GPT OSS 20B
GPT OSS 20B is cheaper on output tokens, while GPT-5.3 Codex offers a larger context window. Choose GPT-5.3 Codex or GPT OSS 20B based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | GPT-5.3 Codex | GPT OSS 20B |
|---|---|---|
| Provider | Impossibl | Impossibl |
| Input / 1M tokens | $1.75 | $0.08 |
| Output / 1M tokens | $14.00 | $0.30 |
| Context window | 400K | 131K |
| Parameters | — | — |
| Open weights | No | Yes |
| Released | Feb 2026 | Aug 2025 |
FAQ
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.