Beam 1.0
Key facts · verified Oct 27, 2026
Beam 1.0 is a Reflection AI model released on 5 Oct 2026. Pricing: Not published — open weights (Apache 2.0); Reflection API. Its context window is 1M tokens. It is not yet ranked on LMArena's text leaderboard. Source: huggingface.co.
Reflection AI’s Beam 1.0, its first open-weight model, announced on 5 October 2026: a sparse mixture-of-experts model with 501 billion total and 23 billion active parameters and a 1-million-token context window, built for coding, reasoning and agentic tasks. It takes and returns text, ships in BF16, FP8 and NVFP4, and is released under Apache 2.0. Reflection serves it through its own API and its Mirror coding agent; it has not published a per-token price.
Not published — open weights (Apache 2.0); Reflection API
1M tokens
Not rated
Not ranked
Key Features
Full Specifications
Not published — open weights (Apache 2.0); Reflection API | |
|---|---|
| Identity | |
| Developer | Reflection AI |
| Released | Oct 2026 |
| Licence | Apache 2.0 (open weights) |
| Self-hostable | Yes — BF16, FP8 and NVFP4 weights |
| Capacity | |
| Context window | 1M tokens |
| Capability | |
| Vision in | No — text in, text out |
| Access | |
| API | Yes — Reflection API (OpenAI SDK compatible) |
| Fine-tuning | Yes — Reflection documents fine-tuning and post-training with open-source stacks |