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OpenAI GPT 120B

gpt-ossReasoningTool CallingOpen WeightsStructured 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...

Providers1
ReleasedAug 5, 2025
Input Modalitiestext
Output Modalitiestext
Tarsk Usecoding

Benchmarks

12.3
Intelligence Index
30.4
Coding Index
93.4
Math Index

Available Providers (1)

ProviderModel IDInput CostOutput CostContextMax OutputDocs
Basetenopenai/gpt-oss-120b$0.10/MTok$0.50/MTok128.1K128.1K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output