OpenAI: gpt-oss-120b (free)

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...

• Context window: 131,072 tokens
• Input: text
• Output: text
• Pricing: $0/M input tokens, $0/M output tokens

View on OpenRouter. Model data sourced from OpenRouter.