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...
Specifications
| Provider | OpenAI |
|---|---|
| Intelligence Index | Not yet benchmarked |
| Context window | 131,072 tokens (131K) |
| Input price | $0.018 / 1M tokens |
| Output price | $0.09 / 1M tokens |
| Input modalities | text |
| Output modalities | text |
| Model ID | openai/gpt-oss-20b |
Pricing is per 1M tokens, indicative pricing via OpenRouter (updated 2026-10-05); a provider's own list price may differ. Intelligence Index via Artificial Analysis.
Frequently asked questions
How much does gpt-oss-20b cost?
Indicative pricing (via OpenRouter, updated 2026-10-05) is $0.018 per 1M input tokens and $0.09 per 1M output tokens. A provider's own list price may differ. On Vincony, gpt-oss-20b is available on credit-based pricing alongside 750+ other models.
What is gpt-oss-20b's context window?
gpt-oss-20b supports a context window of up to 131,072 tokens (131K), which is how much text it can consider at once.
Who makes gpt-oss-20b?
gpt-oss-20b is built by OpenAI. You can access it — and compare it against other providers' models — through Vincony's multi-model platform.
How do I use gpt-oss-20b?
You can use gpt-oss-20b directly through OpenAI, or via Vincony, which aggregates 750+ models (including gpt-oss-20b) into one interface with side-by-side comparison and credit-based pricing.