AIster · The agentic age · Launches
OpenAI releases gpt-oss, first open-weight models since GPT-2
Anyone could now download OpenAI reasoning models and run them on their own hardware
Key facts
- Date
- 5 Aug 2025
- Era
- The agentic age
- Interest
- Launches
- Threads
- Model wars, Open vs closed
- Models
- gpt-oss-120b (117B parameters, 5.1B active) and gpt-oss-20b (21B, 3.6B active)
- Licence
- Apache 2.0
- Hardware
- 120b on a single NVIDIA GPU; 20b within 16GB of memory
On 5 August 2025 OpenAI released two open-weight reasoning models (model files anyone can download), gpt-oss-120b and gpt-oss-20b, free on Hugging Face under the permissive Apache 2.0 licence. The larger one can run on a single NVIDIA GPU and the smaller one on a laptop with 16GB of memory. They were OpenAI's first open language models since GPT-2.
Sources
- OpenAI, Introducing gpt-oss, 2025-08-05
- Hugging Face, openai/gpt-oss-20b, 2025-08-05
- TechCrunch, OpenAI launches two 'open' AI reasoning models, 2025-08-05