gpt-oss-120b
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...
gpt-oss-120b specs and pricing
- Provider: OpenAI
- Released: August 5, 2025
- Context window: 131K tokens
- Max output: 66K tokens
- Input: text
- Output: text
- Price: $0.15 input / $0.60 output per 1M tokens
- Reasoning: yes
- Tool calling: yes
FAQ
- How much does gpt-oss-120b cost? gpt-oss-120b costs $0.15 per million input tokens and $0.60 per million output tokens through OpenRouter. In todo.is a typical agent step costs about 0.5 credits ($1 = 100 credits).
- What is the context window of gpt-oss-120b? gpt-oss-120b can read up to 131K tokens at once and write up to 66K tokens in one reply.
- Can I use gpt-oss-120b without coding? Yes. In todo.is you pick gpt-oss-120b as your agent's model and write to-dos in plain words, on the web, the Android app, WhatsApp or Telegram. No API key needed: credits are included, or you can bring your own key.
JavaScript is required to use the todo.is app.