Using gpt-oss-20b on OpenRouter

Implementation guide · GPT-OSS · OpenAI

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OpenRouter exposes gpt-oss-20b through model ID openai/gpt-oss-20b. Use the setup steps, sourced pricing, capabilities, and official provider links below to validate this route before deployment.

Last refreshed 2026-06-15. Next refresh: weekly.

Quick Start

  1. 1
    Create an account at OpenRouter and generate an API key.
  2. 2
    Use the OpenRouter SDK or REST API to call openai/gpt-oss-20b — see the documentation for request format.
  3. 3
    You'll be billed $0.03/1M input, $0.14/1M output tokens. See full pricing.
API PortalDocumentationPricingModel Card

Code Examples

See OpenRouter documentation for integration details.

Pricing on OpenRouter

TypePrice (per 1M)
Input tokens$0.03
Output tokens$0.14

Capabilities

JSON / Tool useStructured Outputs

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.

Full model details →

Model Specs

Released2025-08-05
Parameters20B
Context131k
ArchitectureDecoder Only
Knowledge cutoff2025-08

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Also available on(11)

Open InferenceFree/1MNovita AI$0.04/1MFeatherless$0.04/1M
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Provider

OpenRouter

OpenRouter, Inc.

New York, NY, USA