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Ember-1 vs Kimi-k1.5

Ember-1 leads the LLM Stats Score 43.1 to 17.1.

Fireworks AI · Moonshot AI · Updated for 2026

Which is better?

Ember-1 leads the overall LLM Stats Score 43.1 to 17.1, ranking #51 overall.

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

Choose Ember-1

  • overall performance matters — it scores 43.1 and ranks #51 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Sep 2026

Choose Kimi-k1.5

  • you are already invested in the Moonshot AI ecosystem

At a glance

The differences that matter most.

Ember-1
Fireworks AI
Kimi-k1.5
Moonshot AI
Core performance indexes
LLM Stats Score
43.1
#51
17.1
#234
Reasoning
38.6
#72
16.4
#231
Cost, coverage & limits
Benchmark wins
—
—
Input price
$3.00 / M
— / M
Output price
$15.00 / M
— / M
Context window
1,040,000
—

Individual benchmarks

4 reported for Ember-1 · 9 for Kimi-k1.5

No common benchmarks found

Ember-1 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 Ember-1 specifies input context (1,040,000 tokens).

Fireworks AI
Ember-1
Input1,040,000 tokens
Output- tokens
Moonshot AI
Kimi-k1.5
Input- tokens
Output- tokens
Fri Oct 09 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Kimi-k1.5 supports multimodal inputs, whereas Ember-1 does not.

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

Ember-1

Text
Images
Audio
Video

Kimi-k1.5

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.

Ember-1

Proprietary

Closed source

Kimi-k1.5

Proprietary

Closed source

Release Timeline

When each model was launched

Ember-1 was released on 2026-09-23, while Kimi-k1.5 was released on 2025-01-20.

Ember-1 is 20 months newer than Kimi-k1.5.

Ember-1

Sep 23, 2026

2 weeks ago

1.7yr newer
Kimi-k1.5

Jan 20, 2025

1.7 years ago

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 Ember-1 and Kimi-k1.5 side-by-side, then vote on the output you prefer.

Ember-1
✓ Preferred
Kimi-k1.5
Open in Playground

FAQ

Common questions about Ember-1 vs Kimi-k1.5.

Which is better, Ember-1 or Kimi-k1.5?

Ember-1 leads the LLM Stats Score 43.1 to 17.1. Ember-1 is made by Fireworks 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 Ember-1 compare to Kimi-k1.5 in benchmarks?

Ember-1 scores SWE-Bench Verified: 92.2%, Terminal-Bench 2.1: 82.0%, DeepSWE 1.1: 75.2%, Tau2 Airline: 66.0%. 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 Ember-1 and Kimi-k1.5?

Ember-1 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 Ember-1 and Kimi-k1.5?

Key differences include LLM Stats Score (43.1 vs 17.1), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Ember-1 and Kimi-k1.5?

Ember-1 is developed by Fireworks AI and Kimi-k1.5 is developed by Moonshot AI.

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