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Reflection

Beam 1.0 501B A23B API

Reflection
About

Build advanced reasoning agents with Beam 1.0 501B A23B, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support, open weights architecture. Access Beam 1.0 501B A23B via the Reflection API with up to 131K output tokens.

Capabilities

Input Modalities

text

Output Modalities

text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
1.0M

Tokens

Input Limit
1.0M

Tokens

Max Output
131K

Tokens

Pricing

Standard (per 1M tokens)

Input
Free
Output
Free

Caching (per 1M tokens)

Read
Free
Frequently Asked Questions

Beam 1.0 501B A23B by Reflection costs Free per 1M input tokens and Free per 1M output tokens. Cached reads cost Free per 1M tokens.

Model Details
ID
Beam-1.0-501B-A23B
Provider
Reflection
Family
beam
Release Date
Oct 5, 2026
Knowledge Cutoff
Jun 30, 2026
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
REFLECTION_API_KEY
API Base URL
https://api.reflection.ai/openai/v1
Documentation