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Beam 1.0 vs Kimi K3.1 Pro

Kimi K3.1 Pro leads the LLM Stats Score 55.5 to 44.3. Beam 1.0 is 6.7x cheaper per token.

Reflection AI · Moonshot AI · Updated for 2026

Which is better?

Kimi K3.1 Pro leads the overall LLM Stats Score 55.5 to 44.3, ranking #5 overall.

In the 4 individual benchmarks reported for both models, Kimi K3.1 Pro wins 4; this is a narrower head-to-head signal than the composite indexes.

On price, Beam 1.0 is roughly 6.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

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

Choose Beam 1.0

  • cost matters — it's about 6.7x cheaper per token
  • you need open weights you can self-host or fine-tune

Choose Kimi K3.1 Pro

  • overall performance matters — it scores 55.5 and ranks #5 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 4 of 4 exact shared results
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Beam 1.0
Reflection AI
Kimi K3.1 Pro
Moonshot AI
Core performance indexes
LLM Stats Score
44.3
#49
55.5
#5
Reasoning
45.1
#40
54.3
#6
Coding
33.8
#44
42.7
#9
Agents
28.8
#59
41.6
#5
Cost, coverage & limits
Benchmark wins
0 of 4
4 of 4
Input price
$0.40 / M
$2.00 / M
Output price
$1.20 / M
$10.00 / M
Context window
1,048,576
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Beam 1.0
Kimi K3.1 Pro
Math
35.1#47
38.6#26
Vision
16.1#108
40.5#4
Tool use
26.9#34
30.4#14
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

22 reported for Beam 1.0 · 30 for Kimi K3.1 Pro

4 shared

Beam 1.0 outperforms in 0 benchmarks, while Kimi K3.1 Pro is better at 4 benchmarks (BrowseComp, GPQA, Humanity's Last Exam, Humanity's Last Exam (with tools)).

Kimi K3.1 Pro significantly outperforms across most benchmarks.

Thu Oct 29 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Beam 1.0 costs less

For input processing, Beam 1.0 ($0.40/1M tokens) is 5.0x cheaper than Kimi K3.1 Pro ($2.00/1M tokens).

For output processing, Beam 1.0 ($1.20/1M tokens) is 8.3x cheaper than Kimi K3.1 Pro ($10.00/1M tokens).

In conclusion, Kimi K3.1 Pro is more expensive than Beam 1.0.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Oct 29 2026 • llm-stats.com
Reflection AI
Beam 1.0
Input tokens$0.40
Output tokens$1.20
Best providerTogether
Moonshot AI
Kimi K3.1 Pro
Input tokens$2.00
Output tokens$10.00
Best providerUnknown Organization
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,048,576 tokens. Kimi K3.1 Pro can generate longer responses up to 1,048,576 tokens, while Beam 1.0 is limited to 131,072 tokens.

Reflection AI
Beam 1.0
Input1,048,576 tokens
Output131,072 tokens
Moonshot AI
Kimi K3.1 Pro
Input1,048,576 tokens
Output1,048,576 tokens
Thu Oct 29 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Kimi K3.1 Pro supports multimodal inputs, whereas Beam 1.0 does not.

Kimi K3.1 Pro 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 K3.1 Pro

Text
Images
Audio
Video

Release Timeline

When each model was launched

Beam 1.0 was released on 2026-10-16, while Kimi K3.1 Pro was released on 2026-10-23.

Kimi K3.1 Pro is 0 month newer than Beam 1.0.

Beam 1.0

Oct 16, 2026

1 weeks ago

Kimi K3.1 Pro

Oct 23, 2026

4 days ago

1w newer

Knowledge Cutoff

When training data ends

Beam 1.0 has a documented knowledge cutoff of 2026-06-30, while Kimi K3.1 Pro'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 K3.1 Pro's cutoff date.

Beam 1.0

Jun 2026

Kimi K3.1 Pro

—

Provider Availability

Beam 1.0 is available from Together, Reflection AI. Kimi K3.1 Pro is available from Moonshot AI.

Beam 1.0

together logo
Together
Input Price:Input: $0.40/1MOutput Price:Output: $1.20/1M
reflection logo
Unknown Organization

Kimi K3.1 Pro

moonshot logo
Unknown Organization
Input Price:Input: $2.00/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Beam 1.0 and Kimi K3.1 Pro side-by-side, then vote on the output you prefer.

Beam 1.0
✓ Preferred
Kimi K3.1 Pro
Open in Playground

FAQ

Common questions about Beam 1.0 vs Kimi K3.1 Pro.

Which is better, Beam 1.0 or Kimi K3.1 Pro?

Kimi K3.1 Pro leads the LLM Stats Score 55.5 to 44.3. Beam 1.0 is made by Reflection AI and Kimi K3.1 Pro 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 K3.1 Pro 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 K3.1 Pro scores BabyVision: 95.4%, GPQA: 94.2%, BenchCAD (with Python tool): 92.7%, BrowseComp: 92.1%, Chartography: 90.2%.

Is Beam 1.0 cheaper than Kimi K3.1 Pro?

Beam 1.0 is 5.0x cheaper for input tokens. Beam 1.0 costs $0.40/M input and $1.20/M output via together. Kimi K3.1 Pro costs $2.00/M input and $10.00/M output via moonshot.

What are the context window sizes for Beam 1.0 and Kimi K3.1 Pro?

Beam 1.0 supports 1.0M tokens and Kimi K3.1 Pro supports 1.0M 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 K3.1 Pro?

Key differences include LLM Stats Score (44.3 vs 55.5), input pricing ($0.40 vs $2.00/M), multimodal support (no vs yes), licensing (Apache 2.0 vs Unknown). See the full comparison above for benchmark-by-benchmark results.

Who makes Beam 1.0 and Kimi K3.1 Pro?

Beam 1.0 is developed by Reflection AI and Kimi K3.1 Pro is developed by Moonshot AI.

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