# SiliconANGLE — Reflection AI debuts open-source Beam model with 501B parameters

- Company: SiliconANGLE (siliconangle.com)
- Announced: 2026-10-06T00:46:33+00:00
- Category: open-weight-release
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://siliconangle.com/2026/10/05/reflection-ai-debuts-open-source-beam-model-with-501b-parameters/
- Record: https://forck.live/items/16124-reflection-ai-debuts-open-source-beam-model-with-501b-parameters
- Subject: Reporting
- Open weights: yes
- Models affected: Beam, Beam Base, GLM-5.2, Qwen 3.8-Max, Claude Fable 5.1

Reflection AI released Beam, an open-source large language model with 501 billion parameters. The company reports that Beam can outperform some tasks compared to GLM-5.2 while using less hardware, and approaches the performance of Qwen 3.8-Max, a model with over 2 trillion parameters. Beam is initially available through an early access program, with weights and tools to be released later this month.

## Evidence

Verbatim from https://siliconangle.com/2026/10/05/reflection-ai-debuts-open-source-beam-model-with-501b-parameters/:

> The company determined that Beam can perform some tasks better while using between one third and one fourth the hardware. Furthermore, it says that the LLM approaches the performance of Qwen 3.8-Max, a model with over 2 trillion parameters.

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