GPT-OSS
language modelOpenAI
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...
Key facts
| Made by | OpenAI |
|---|---|
| Type | language model |
| Released | August 5, 2025 |
| Reads at once | 131,072 tokens |
| Price (API, per million tokens) | $0.15 in · $0.6 out |
| Input → output | text → text |
| Sizes | 120B, 20B |
Questions about GPT-OSS
Who makes GPT-OSS?
GPT-OSS is made by OpenAI.
When was GPT-OSS released?
We first saw GPT-OSS listed on August 5, 2025.
How much does GPT-OSS cost?
Through OpenRouter it costs $0.15 per million input tokens and $0.6 per million output tokens. Prices change, so check the provider before you build on it.
How much text can GPT-OSS read at once?
Up to 131,072 tokens, roughly 98.3K words.
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