# OpenRouter adds Reflection Beam 1.0 501B model

> Reflection’s new open‑weight model for coding and long‑term AI workflows is now listed on OpenRouter.

Oossa · 2026-10-16 · https://oossa.com/en/openrouter-adds-reflection-beam-1-0-501b-model

OpenRouter now lists Reflection’s Beam 1.0 model. The model is built for reasoning tasks like code generation and multi‑step agent workflows. It uses a sparse mixture‑of‑experts design with 501 billion total parameters but only 23 billion active per token. The context window can hold up to 1,048,576 tokens.

## The facts

- Model: Reflection Beam 1.0 501B A23B
- Active parameters per token: 23 billion; total parameters: 501 billion

## Why it matters

Developers can run larger, more capable reasoning models without paying for full 501 billion‑parameter costs.

## Sources & references

1. [New on OpenRouter: Reflection: Beam 1.0 501B A23B](https://openrouter.ai/reflection/beam-1.0-501b-a23b) – OpenRouter API, 2026-10-16

Last updated: 2026-10-16