Chat & Reasoning Model · OpenAI
GPT-OSS 120B
GPT-OSS 120B is OpenAI's open-weight model available free on OpenRouter with a 131K-token context, suited to general reasoning and agent experiments. A smaller openai/gpt-oss-20b:free variant covers faster experiments.
At a glance (verified 2026-07-13)
- Vendor
- OpenAI
- Type
- Chat & Reasoning Model
- Context window
- 131K tokens
- Free tier on OpenRouter
- Yes
- OpenRouter ID
- openai/gpt-oss-120b:free
Best for
How to use GPT-OSS 120B in TeamDay
Connect an OpenRouter key; TeamDay uses free reasoning models like GPT-OSS for drafts and low-risk agent steps before escalating to frontier models.
Frequently asked questions
Is GPT-OSS 120B free?
Yes — openai/gpt-oss-120b:free was a zero-cost model ID on OpenRouter as of July 13, 2026.
What is GPT-OSS 120B's context window?
131K tokens, the same as the smaller free gpt-oss-20b variant.
Can I use GPT-OSS in production AI employees?
Use it for experiments, drafts, routing, and extraction; escalate customer-facing decisions, complex reasoning, and final review to paid frontier models — that is how TeamDay's AI employees use free models.
Related
- Llama 3.3 70B — Chat & Reasoning Model
- Nemotron 3 Ultra 550B — Chat & Reasoning Model
- GPT-5.6 (Sol, Terra, Luna) — Chat & Reasoning Model
- Guide: Best Free Models on OpenRouter 2026
GPT-OSS 120Bis one of the models TeamDay's AI employees already run — no API keys, no infrastructure.
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