Last refreshed 2026-05-11. Next refresh: weekly.
Why use gpt-oss-20b on OpenRouter?
OpenRouter offers gpt-oss-20b with pay-as-you-go pricing at $0.03/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare gpt-oss-20b across 6 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: openai/gpt-oss-20bopenai/gpt-oss-20bRequest example
openai/gpt-oss-20b.Gotchas
- Use provider model ID "openai/gpt-oss-20b", not the LLMReference slug "gpt-oss-20b".
Compare gpt-oss-20b Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenRouter | $0.03 | $0.14 |
| Fireworks AI | $0.07 | $0.30 |
| GCP Vertex AI | $0.07 | $0.25 |
| NVIDIA NIM | — | — |
| GroqCloud | $0.07 | $0.30 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.03 |
| Output tokens | $0.14 |
Capabilities
About gpt-oss-20b
OpenAI open-weight model with 20 billion parameters. Lightweight, efficient text-only model with reasoning and function calling. Free for self-hosting. Released August 5, 2025.
FAQ
What does gpt-oss-20b cost on OpenRouter?
On OpenRouter, gpt-oss-20b costs $0.03 per 1M input tokens and $0.14 per 1M output tokens.
What is the context window for gpt-oss-20b on OpenRouter?
gpt-oss-20b supports a 131,072 token context window on OpenRouter.
How does OpenRouter compare to other gpt-oss-20b providers?
gpt-oss-20b is available from 6 providers. The cheapest input pricing is $0.03/1M tokens from OpenRouter.
What API model ID do I use for gpt-oss-20b on OpenRouter?
Use the model ID openai/gpt-oss-20b when calling OpenRouter's API.
Who created gpt-oss-20b?
gpt-oss-20b was created by OpenAI as part of the GPT-OSS model family.
Is gpt-oss-20b open source?
gpt-oss-20b is open source according to the seed data.