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    OpenAI: gpt-oss-120b (exacto)Exacto variant

    openai/gpt-oss-120b:exacto

    Created Aug 5, 2025131,072 context
    $0.05/M input tokens$0.24/M output tokens

    gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized to run on a single H100 GPU with native MXFP4 quantization. The model supports configurable reasoning depth, full chain-of-thought access, and native tool use, including function calling, browsing, and structured output generation.

    Sample code and API for gpt-oss-120b (exacto)

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    Using third-party SDKs

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