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Beam 1.0 501B A23B
Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows.
Specifications
| Lab | Reflection |
|---|---|
| Context window | 1M tokens |
| Input price | $1.00/1M |
| Output price | $3.00/1M |
| Release | Oct 2026 |
Strengths
- 501B sparse mixture-of-experts with 23B active parameters per token
- Open-weight release under Apache 2.0
- Purpose-built for coding and long-horizon agentic workflows with native tool calling
- 1M-token context window with adjustable reasoning effort (low to max)
- Frontier-lite API pricing ($1.00 in / $3.00 out per 1M tokens)
Weaknesses
- Launched 2026-10 with no independent benchmark results yet
- 501B total size needs heavy inference infrastructure despite MoE sparsity
- Text-only — no image or multimodal input
Best for
- Agentic coding workflows and long-horizon software tasks
- Self-hosted open-weight deployments
- Long-context reasoning with controllable effort
In Depth: Beam 1.0 501B A23B
Summary
Beam 1.0 501B A23B is an AI model from Reflection.
Released in Oct 2026. It takes text input and produces text output, with a context window of 1M tokens. Input pricing is $1.00 per 1M tokens and output is $3.00 per 1M tokens on OpenRouter.