# gpt-oss-20b — price & specs

Source: https://modelbank.ai/models/gpt-oss-20b · updated 2026-11-12 · ModelBank

| Field | Value |
|---|---|
| Vendor | OpenAI |
| Input price | $0.03 / 1M tokens |
| Output price | $0.13 / 1M tokens |
| Cached input | $0.03 / 1M tokens |
| Context window | 131,072 tokens |
| Max output | 117,964 tokens |
| Input modalities | text |
| Reasoning / tool use | yes / yes |
| Intelligence / coding index | — / 20.7 |
| Released | 2025-08-05 |
| Retirement date | none announced |

## About

gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...

## Price history

- 2026-09-24: $0.018 in / $0.09 out
- 2026-11-01: $0.03 in / $0.13 out


JSON: https://modelbank.ai/api/v1/models/gpt-oss-20b