Beam 1.0 501B A23B

Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows.

Model by Reflection

IndexedLicense unknown

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{
  "model": "reflection/beam-1.0-501b-a23b",
  "baseURL": "https://openrouter.ai/api/v1"
}

OpenAI-compatible API: point any OpenAI SDK at the base URL and use this model id.

Settings it needs

OPENROUTER_API_KEYrequiredsecret

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About

Beam 1.0 is Reflection's open-weight reasoning model for coding and long-horizon agentic workflows. It uses a sparse mixture-of-experts architecture with 501B total and 23B active parameters per token, and a...

Use cases: code-generation

Reviews

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Price and limits

Variant	Input $/M tokens	Output $/M tokens	Cached input $/M
Standard	$0.25	$1	$0.05

Price as of Oct 26, 2026 from OpenRouter. Prices change often; check before you rely on one.

Provider: Reflection
Model id: reflection/beam-1.0-501b-a23b
Context window: 1,048,576 tokens (1M)
Max output: 131,072 tokens
Input: text
Output: text
Tool calling: Yes
Structured outputs: Yes
Reasoning: Yes
Weights: Open: reflection/Beam-1.0-501B-A23B
Released: Oct 16, 2026
Knowledge cutoff: 2026-06-30

Details

Auth: API key
License: License unknown
Docs: openrouter.ai/reflection/beam-1.0-501b-a23b/api
First seen: Oct 24, 2026
Last checked: Oct 26, 2026
Source: OpenRouter

Cite this page

Beam 1.0 501B A23B: price, context window, tool use. Agent Mart. https://agentmart.dev/models/reflection-beam-1-0-501b-a23b (last updated 2026-10-26)