Reflection: Beam 1.0 501B A23B

501B / 23B

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

Context
1.0M
Max output
131K
Input price
$0.25/1M tokens
Output price
$1/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode

Details

Model IDreflection/beam-1.0-501b-a23b
Provider OpenRouter
Creator reflection
Family—
License—
Status—
Type—
Input modalitiestext
Output modalitiestext
Open weight—
Parameters501B / 23B
Architecture—
Context window1.0M tokens
Max input—
Max output131K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$0.25
Output
$1
Cache write
—
Cache read
$0.05
Batch in
—
Batch out
—

API

GET/v1/models/openrouter/reflection/beam-1.0-501b-a23b

Reflection: Beam 1.0 501B A23B

reflection/beam-1.0-501b-a23b

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

Changes · 4 entries
reflection/beam-1.0-501b-a23bcreateca7a400Nov 2, 2026, 03:02 AM
reflection/beam-1.0-501b-a23bupdateb2f45bfOct 29, 2026, 03:29 AM
max_output_tokens943718→131072
pricinginput$0.3→$0.25cached input$0.04→$0.05
reflection/beam-1.0-501b-a23bupdate42a9895Oct 20, 2026, 06:39 AM
pricinginput$1→$0.3output$3→$1cached input$0.1→$0.04
reflection/beam-1.0-501b-a23bcreate03ad82bOct 17, 2026, 06:33 AM