Beam 1.0 501B A23B

Reflection's Apache 2.0 open-weight text model with 501.3B total and 23.4B active parameters, built for coding, reasoning and tool use. It supports a shared 1,048,576-token context window, up to 131,072 output tokens, JSON mode and structured output. Reasoning is always enabled with low, medium, high, xhigh and max effort; NanoGPT defaults to max. Knowledge cutoff: June 30, 2026.

  • Reasoning
  • Tool Calling
  • Structured Output

Added Oct 16, 2026

Pricing

Auto routing · per 1M tokens
Input
$1.30
Output
$4.30
Cache read
$0.13
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Specifications

Context window
1M
Max output
131.1K
Parameters
501.3B / 23.4B
Total / active

Benchmarks

Sourced from Artificial Analysis.

Intelligence Index

30.3

Better than 85% of models compared

Document reasoning

AA-LCR (unversioned / legacy)

Legacy fallback · Long context reasoning evaluation

78.0%

Better than 79% of models compared

Reasoning

HLE

Humanity's Last Exam

34.7%

Better than 81% of models compared

Coding

SciCode

Python programming for scientific computing

48.5%

Better than 47% of models compared

Last updated Oct 16, 2026

Artificial Analysis

Providers

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