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Beam 1.0 vs Kimi-k1.5

Beam 1.0 leads the LLM Stats Score 44.6 to 16.7.

Reflection AI · Moonshot AI · Updated for 2026

Which is better?

Beam 1.0 leads the overall LLM Stats Score 44.6 to 16.7, ranking #46 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Beam 1.0

  • overall performance matters — it scores 44.6 and ranks #46 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Oct 2026
  • you need open weights you can self-host or fine-tune

Choose Kimi-k1.5

  • you are already invested in the Moonshot AI ecosystem

At a glance

The differences that matter most.

Beam 1.0
Reflection AI
Kimi-k1.5
Moonshot AI
Core performance indexes
LLM Stats Score
44.6
#46
16.7
#244
Reasoning
45.5
#37
15.9
#241
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.40 / M
— / M
Output price
$1.20 / M
— / M
Context window
1,048,576
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Beam 1.0
Kimi-k1.5
Math
35.1#45
20.2#172
Vision
15.9#105
10.9#130
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

22 reported for Beam 1.0 · 9 for Kimi-k1.5

No common benchmarks found

Beam 1.0 and Kimi-k1.5don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Beam 1.0 specifies input context (1,048,576 tokens). Only Beam 1.0 specifies output context (131,072 tokens).

Reflection AI
Beam 1.0
Input1,048,576 tokens
Output131,072 tokens
Moonshot AI
Kimi-k1.5
Input- tokens
Output- tokens
Thu Oct 22 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Kimi-k1.5 supports multimodal inputs, whereas Beam 1.0 does not.

Kimi-k1.5 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Beam 1.0

Text
Images
Audio
Video

Kimi-k1.5

Text
Images
Audio
Video

License

Usage and distribution terms

Beam 1.0 is licensed under Apache 2.0, while Kimi-k1.5 uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

Beam 1.0

Apache 2.0

Open weights

Kimi-k1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Beam 1.0 was released on 2026-10-16, while Kimi-k1.5 was released on 2025-01-20.

Beam 1.0 is 21 months newer than Kimi-k1.5.

Beam 1.0

Oct 16, 2026

3 days ago

1.7yr newer
Kimi-k1.5

Jan 20, 2025

1.7 years ago

Knowledge Cutoff

When training data ends

Beam 1.0 has a documented knowledge cutoff of 2026-06-30, while Kimi-k1.5's cutoff date is not specified.

We can confirm Beam 1.0's training data extends to 2026-06-30, but cannot make a direct comparison without Kimi-k1.5's cutoff date.

Beam 1.0

Jun 2026

Kimi-k1.5

—

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Beam 1.0 and Kimi-k1.5 side-by-side, then vote on the output you prefer.

Beam 1.0
✓ Preferred
Kimi-k1.5
Open in Playground

FAQ

Common questions about Beam 1.0 vs Kimi-k1.5.

Which is better, Beam 1.0 or Kimi-k1.5?

Beam 1.0 leads the LLM Stats Score 44.6 to 16.7. Beam 1.0 is made by Reflection AI and Kimi-k1.5 is made by Moonshot AI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Beam 1.0 compare to Kimi-k1.5 in benchmarks?

Beam 1.0 scores AIME 2026: 97.7%, GPQA: 90.6%, LiveCodeBench: 88.3%, SWE-Bench Verified: 81.6%, MCP Atlas: 80.8%. Kimi-k1.5 scores MATH-500: 96.2%, CLUEWSC: 91.4%, C-Eval: 88.3%, MMLU: 87.4%, IFEval: 87.2%.

What are the context window sizes for Beam 1.0 and Kimi-k1.5?

Beam 1.0 supports 1.0M tokens and Kimi-k1.5 supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Beam 1.0 and Kimi-k1.5?

Key differences include LLM Stats Score (44.6 vs 16.7), multimodal support (no vs yes), licensing (Apache 2.0 vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Beam 1.0 and Kimi-k1.5?

Beam 1.0 is developed by Reflection AI and Kimi-k1.5 is developed by Moonshot AI.

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