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Kimi-k1.5 vs Muse Ember

Muse Ember leads the LLM Stats Score 45.9 to 16.5.

Moonshot AI · Meta · Updated for 2026

Which is better?

Muse Ember leads the overall LLM Stats Score 45.9 to 16.5, ranking #47 overall.

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

Choose Kimi-k1.5

  • you are already invested in the Moonshot AI ecosystem

Choose Muse Ember

  • overall performance matters — it scores 45.9 and ranks #47 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Nov 2026

At a glance

The differences that matter most.

Kimi-k1.5
Moonshot AI
Muse Ember
Meta
Core performance indexes
LLM Stats Score
16.5
#264
45.9
#47
Reasoning
15.9
#261
48.1
#24
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.10 / M
Output price
— / M
$0.50 / M
Context window
—
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

2 shared
Index
Kimi-k1.5
Muse Ember
Vision
10.6#142
23.4#78
Multimodal
14.2#119
23.6#74
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Kimi-k1.5 · 6 for Muse Ember

No common benchmarks found

Kimi-k1.5 and Muse Emberdon'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 Muse Ember specifies input context (1,048,576 tokens). Only Muse Ember specifies output context (524,288 tokens).

Moonshot AI
Kimi-k1.5
Input- tokens
Output- tokens
Meta
Muse Ember
Input1,048,576 tokens
Output524,288 tokens
Thu Nov 12 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Kimi-k1.5 and Muse Ember support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Kimi-k1.5

Text
Images
Audio
Video

Muse Ember

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Kimi-k1.5

Proprietary

Closed source

Muse Ember

Proprietary

Closed source

Release Timeline

When each model was launched

Kimi-k1.5 was released on 2025-01-20, while Muse Ember was released on 2026-11-09.

Muse Ember is 22 months newer than Kimi-k1.5.

Kimi-k1.5

Jan 20, 2025

1.8 years ago

Muse Ember

Nov 9, 2026

3 days ago

1.8yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

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

Kimi-k1.5
✓ Preferred
Muse Ember
Open in Playground

FAQ

Common questions about Kimi-k1.5 vs Muse Ember.

Which is better, Kimi-k1.5 or Muse Ember?

Muse Ember leads the LLM Stats Score 45.9 to 16.5. Kimi-k1.5 is made by Moonshot AI and Muse Ember is made by Meta. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Kimi-k1.5 compare to Muse Ember in benchmarks?

Kimi-k1.5 scores MATH-500: 96.2%, CLUEWSC: 91.4%, C-Eval: 88.3%, MMLU: 87.4%, IFEval: 87.2%. Muse Ember scores PerceptionBench: 80.6%, OSWorld 2.1 (partial): 69.5%, Agents' Last Exam: 61.6%, Personal Superintelligence Index: 46.8%, Terminal-Bench 4.0: 40.9%.

What are the context window sizes for Kimi-k1.5 and Muse Ember?

Kimi-k1.5 supports an unknown number of tokens and Muse Ember 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 Kimi-k1.5 and Muse Ember?

Key differences include LLM Stats Score (16.5 vs 45.9). See the full comparison above for benchmark-by-benchmark results.

Who makes Kimi-k1.5 and Muse Ember?

Kimi-k1.5 is developed by Moonshot AI and Muse Ember is developed by Meta.

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