Nvidia-backed Reflection unveils Beam, its first open-weight model
Reflection AI, the Nvidia-backed startup founded by former Google DeepMind researchers, has unveiled Beam, its first open-weight model. Beam is built for coding, reasoning and agentic work. Reflection will release its weights later this month, the company said in a blog post on Monday.
Anyone can download an open-weight model and run it on their own hardware. Beam is still going through final red-teaming and evaluations. For now, a select group of users can try an early version through a waitlist. Axios first reported on Sunday that the launch was close.
What Reflection says Beam can do
Beam is a mixture-of-experts model with 501 billion parameters in total. Only 23 billion of them are active at a time. Reflection pretrained it on 23.8 trillion tokens, and its context window reaches one million tokens.
On coding and agentic tasks, Reflection said Beam is competitive with GLM 5.2 from China’s Z.ai. It...
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