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Kimi K2.8 Preview vs Muse Spark 1.3

Comparing Kimi K2.8 Preview and Muse Spark 1.3 across benchmarks, pricing, and capabilities.

Moonshot AI · Meta · Updated for 2026

Which is better?

Kimi K2.8 Preview and Muse Spark 1.3 trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.

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

Choose Kimi K2.8 Preview

  • you want the most recent training data — it shipped Sep 2026

Choose Muse Spark 1.3

  • you want predictable pricing at $0.10/M input and $0.20/M output

At a glance

The differences that matter most.

Kimi K2.8 Preview
Moonshot AI
Muse Spark 1.3
Meta
Benchmark wins
—
—
Input price
— / M
$0.10 / M
Output price
— / M
$0.20 / M
Context window
1,048,576
1,048,576

Individual benchmarks

0 reported for Kimi K2.8 Preview · 11 for Muse Spark 1.3

No common benchmarks found

Kimi K2.8 Preview and Muse Spark 1.3don'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

Both models have the same input context window of 1,048,576 tokens. Only Muse Spark 1.3 specifies output context (943,718 tokens).

Moonshot AI
Kimi K2.8 Preview
Input1,048,576 tokens
Output- tokens
Meta
Muse Spark 1.3
Input1,048,576 tokens
Output943,718 tokens
Mon Sep 14 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Kimi K2.8 Preview and Muse Spark 1.3 support multimodal inputs.

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

Kimi K2.8 Preview

Text
Images
Audio
Video

Muse Spark 1.3

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 K2.8 Preview

Proprietary

Closed source

Muse Spark 1.3

Proprietary

Closed source

Release Timeline

When each model was launched

Kimi K2.8 Preview was released on 2026-09-11, while Muse Spark 1.3 was released on 2026-09-02.

Kimi K2.8 Preview is 0 month newer than Muse Spark 1.3.

Kimi K2.8 Preview

Sep 11, 2026

3 days ago

1w newer
Muse Spark 1.3

Sep 2, 2026

1 weeks 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

Provider Availability

Kimi K2.8 Preview is available from Moonshot AI. Muse Spark 1.3 is available from Meta Model API.

Kimi K2.8 Preview

moonshot logo
Unknown Organization

Muse Spark 1.3

meta logo
Meta
Input Price:Input: $0.10/1MOutput Price:Output: $0.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Kimi K2.8 Preview and Muse Spark 1.3 side-by-side, then vote on the output you prefer.

Kimi K2.8 Preview
✓ Preferred
Muse Spark 1.3
Open in Playground

FAQ

Common questions about Kimi K2.8 Preview vs Muse Spark 1.3.

Which is better, Kimi K2.8 Preview or Muse Spark 1.3?

Kimi K2.8 Preview (Moonshot AI) and Muse Spark 1.3 (Meta) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Kimi K2.8 Preview compare to Muse Spark 1.3 in benchmarks?

Muse Spark 1.3 scores MRCR v2 (8-needle): 98.5%, MRCR v2 (8-needle, 512K-1M): 98.1%, DeepSearchQA: 89.4%, Terminal-Bench 2.1: 88.8%, DeepSWE 1.1: 75.4%.

What are the context window sizes for Kimi K2.8 Preview and Muse Spark 1.3?

Kimi K2.8 Preview supports 1.0M tokens and Muse Spark 1.3 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Kimi K2.8 Preview and Muse Spark 1.3?

Kimi K2.8 Preview is developed by Moonshot AI and Muse Spark 1.3 is developed by Meta.

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