# Beam 1.0 501B A23B

Beam 1.0 501B A23B is a model from Reflection with open weights, released on 16 Oct 2026. The context window is 1,048,576 tokens. The maximum output is 131,072 tokens. Pricing is $0.40 per million input tokens and $1.20 per million output tokens.

- Developer: Reflection
- Id: beam-1.0-501b-a23b
- Released: 2026-10-16T00:00:00.000Z
- Sighting: 2026-10-16T13:50:48.523Z
  - [evidence link](https://models.dev/#Beam-1.0-501B-A23B)
- Status: Released
- Canonical: https://alexgetman.com/models/reflection/beam-1-0-501b-a23b/

## Questions

### What is the context window of Beam 1.0 501B A23B?

The context window is 1,048,576 tokens. The maximum output is 131,072 tokens.

### How much does Beam 1.0 501B A23B cost?

Pricing is $0.40 per million input tokens and $1.20 per million output tokens. Cached input is $0.04 per million.

### Are the weights of Beam 1.0 501B A23B publicly available?

Yes. Reflection publishes the weights.

### When was Beam 1.0 501B A23B released?

On 16 Oct 2026.

## Evidence links

- [Artificial Analysis · benchmarks](https://artificialanalysis.ai/models)
- [review](https://developers.reflection.ai/models)
- [review](https://huggingface.co/reflection/Beam-1.0-501B-A23B)
- [Hugging Face · inference providers](https://huggingface.co/reflection/Beam-1.0-501B-A23B-NVFP4)
- [review](https://huggingface.co/reflection/Beam-1.0-501B-A23B/blob/12950ae640b48cbbe9b5bb7735bf197507d6383f/README.md)
- [models-dev](https://models.dev/#Beam-1.0-501B-A23B)
- [models.dev · catalogue](https://models.dev/#beam)
- [models.dev · catalogue](https://models.dev/#beam-1.0)
- [models.dev · catalogue](https://models.dev/#beam-1.0-501b-a23b)
- [models.dev · catalogue](https://models.dev/#beam-free)
- [models.dev · catalogue](https://models.dev/#reflection-beam)
- [OpenCode · discovery](https://opencode.ai/data/reflection/beam-1-0-501b-a23b)
- [OpenCode Go · models](https://opencode.ai/go)
- [opencode-go](https://opencode.ai/inference/go/v1/models)
- [OpenCode Zen · models](https://opencode.ai/zen)
- [OpenRouter · usage](https://openrouter.ai/rankings)
- [openrouter](https://openrouter.ai/reflection/beam-1.0-501b-a23b)
- [review](https://reflection.ai/blog/beam-is-available)
- [review](https://reflection.ai/blog/introducing-beam)
- [review](https://vercel.com/changelog/reflection-ai-beam-now-available-on-ai-gateway-for-free)

## Signals

- [Beam is out — free on OpenCode Zen](https://alexgetman.com/signals/2026/10/16/beam-out-free-opencode-zen/)
- [Beam 1.0 501B A23B: Open weights](https://alexgetman.com/signals/2026/10/16/beam-1-0-501b-a23b/)