gpt-oss-20b is an AI model from OpenAI in the GPT series. Agent Mag tracks its context window, pricing, modalities, and supported API parameters on this page.

How do you use gpt-oss-20b?

gpt-oss-20b can be called through OpenRouter's OpenAI-compatible API using the model ID openai/gpt-oss-20b. This page includes a ready-to-run curl example and the supported parameter list.

gpt-oss-20b is a paid model in the OpenRouter catalog, with separate input and output token pricing shown on this page.

gpt-oss-20b

All models

OpenAIGPT

gpt-oss-20b

131K context

$0.030/M input

$0.140/M output

gpt-oss-20b is an AI model from OpenAI built for agent workflows, with support for text input and text output. 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...

What is gpt-oss-20b?

gpt-oss-20b is an AI model from OpenAI that Agent Mag tracks for pricing, context window, modalities, benchmarks, and API compatibility. Builders can use this page to compare gpt-oss-20b against other models for agent workflows and production deployments.

Model ID

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...

Modalities

Input

text

Output

text

Supported Parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

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