Beam
4.2/ 5
Reflection's open-weight model for coding and agents, with a 1M context window.
Also known as Reflection Beam, Beam 1.0
What it does
Beam is Reflection's first open-weight model, released October 16, 2026. The announcement describes a sparse mixture-of-experts model with 501 billion total parameters and 23 billion active, built for coding, reasoning, and agentic work. The Hugging Face model card lists 501.3 billion total parameters, 23.4 billion active, a 1 million token context window, and text in and out. Weights are under Apache 2.0. Reflection says the public beta of its API is free to start.
Who is Beam for?
Developers who want an open-weight model for coding and agent harnesses, self-hosted or through an API.
Tags
- open-weight
- coding
- agents
Key facts
- Made by
- Reflection
- Category
- Coding agents, Local models
- Pricing model
- Freemium
- Open source
- Yes
- Official site
- reflection.ai
- VibeStack score
- 4.2 / 5
- Last reviewed
