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Providers for gpt-oss-20b (free)

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Performance for gpt-oss-20b (free)

Compare different providers across OpenRouter

Apps using gpt-oss-20b (free)

Top public apps this week using this model

Recent activity on gpt-oss-20b (free)

Total usage per day on OpenRouter

Uptime stats for gpt-oss-20b (free)

Uptime stats for gpt-oss-20b (free) across all providers

Sample code and API for gpt-oss-20b (free)

OpenRouter normalizes requests and responses across providers for you.

OpenRouter supports reasoning-enabled models that can show their step-by-step thinking process. Use the reasoning parameter in your request to enable reasoning, and access the reasoning_details array in the response to see the model's internal reasoning before the final answer. When continuing a conversation, preserve the complete reasoning_details when passing messages back to the model so it can continue reasoning from where it left off. Learn more about reasoning tokens.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.