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OpenAI GPT 120B

gpt-oss Reasoning Tool Calling Open Weights Structured Output

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...

Providers 1
Released Aug 5, 2025
Input Modalities text
Output Modalities text
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Available Providers (1)

Provider Model ID Input Cost Output Cost Context Max Output Docs
Baseten openai/gpt-oss-120b $0.10/MTok $0.50/MTok 128.1K 128.1K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output