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...
openai/gpt-oss-120bgpt-oss-120b is an API model from OpenAI, released on Aug 5, 2025, with a context window of 131,072 tokens, pricing of $0.029 per million input tokens and $0.106 per million output tokens. It accepts text input and produces text output.
At listed prices, a request with 10,000 input tokens and 1,000 output tokens costs about $0.0004.
Specs are sourced from OpenRouter and were last checked on Nov 3, 2026. Always confirm current pricing and limits with the provider before production use.
gpt-oss-120b supports a context window of 131,072 tokens.
gpt-oss-120b is listed at $0.029 per million input tokens and $0.106 per million output tokens on OpenRouter.
gpt-oss-120b was published on Aug 5, 2025.
gpt-oss-120b accepts text input and produces text output.