Model Comparison

Kimi K2 0905 vs Muse Spark 1.1Which is better in 2026?

Comparing Kimi K2 0905 and Muse Spark 1.1 across benchmarks, pricing, and capabilities.

Verdict: Kimi K2 0905 vs Muse Spark 1.1 — which is better?

Kimi K2 0905 (by Moonshot AI) and Muse Spark 1.1 (by Meta) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

On price, Kimi K2 0905 is roughly 1.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Muse Spark 1.1 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Kimi K2 0905 if…

  • cost matters — it's about 1.9x cheaper per token

Choose Muse Spark 1.1 if…

  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Kimi K2 0905 and Muse Spark 1.1don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K2 0905 costs less

For input processing, Kimi K2 0905 ($0.60/1M tokens) is 2.1x cheaper than Muse Spark 1.1 ($1.25/1M tokens).

For output processing, Kimi K2 0905 ($2.50/1M tokens) is 1.7x cheaper than Muse Spark 1.1 ($4.25/1M tokens).

In conclusion, Muse Spark 1.1 is more expensive than Kimi K2 0905.*

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

Lowest available price from all providers
Tue Jul 21 2026 • llm-stats.com
Moonshot AI
Kimi K2 0905
Input tokens$0.60
Output tokens$2.50
Best providerNovita
Meta
Muse Spark 1.1
Input tokens$1.25
Output tokens$4.25
Best providerMeta
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Muse Spark 1.1 accepts 1,048,576 input tokens compared to Kimi K2 0905's 262,144 tokens. Kimi K2 0905 can generate longer responses up to 262,144 tokens, while Muse Spark 1.1 is limited to 131,072 tokens.

Moonshot AI
Kimi K2 0905
Input262,144 tokens
Output262,144 tokens
Meta
Muse Spark 1.1
Input1,048,576 tokens
Output131,072 tokens
Tue Jul 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Muse Spark 1.1 supports multimodal inputs, whereas Kimi K2 0905 does not.

Muse Spark 1.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Kimi K2 0905

Text
Images
Audio
Video

Muse Spark 1.1

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 0905

Proprietary

Closed source

Muse Spark 1.1

Proprietary

Closed source

Release Timeline

When each model was launched

Kimi K2 0905 was released on 2025-09-05, while Muse Spark 1.1 was released on 2026-07-09.

Muse Spark 1.1 is 10 months newer than Kimi K2 0905.

Kimi K2 0905

Sep 5, 2025

10 months ago

Muse Spark 1.1

Jul 9, 2026

1 weeks ago

10mo 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

Provider Availability

Kimi K2 0905 is available from Novita. Muse Spark 1.1 is available from Meta Model API.

Kimi K2 0905

novita logo
Novita
Input Price:Input: $0.60/1MOutput Price:Output: $2.50/1M

Muse Spark 1.1

meta logo
Meta
Input Price:Input: $1.25/1MOutput Price:Output: $4.25/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Moonshot AI
Less expensive input tokens
Less expensive output tokens
Meta
Larger context window (1,048,576 tokens)
Supports multimodal inputs

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Kimi K2 0905 and Muse Spark 1.1 side-by-side, then vote on the output you prefer.

Kimi K2 0905
✓ Preferred
Muse Spark 1.1
Open in Playground
AI Model Comparison Table
Feature
Moonshot AI
Kimi K2 0905
Meta
Muse Spark 1.1

FAQ

Common questions about Kimi K2 0905 vs Muse Spark 1.1.

Which is better, Kimi K2 0905 or Muse Spark 1.1?

Kimi K2 0905 (Moonshot AI) and Muse Spark 1.1 (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 0905 compare to Muse Spark 1.1 in benchmarks?

Kimi K2 0905 scores HumanEval: 94.5%, MMLU: 90.2%, MATH: 89.1%, MMLU-Pro: 82.5%, GPQA: 75.8%. Muse Spark 1.1 scores CharXiv-R: 88.4%, MCP Atlas: 88.1%, OSWorld-Verified: 80.8%, Terminal-Bench 2.1: 80.0%, BabyVision: 76.3%.

Is Kimi K2 0905 cheaper than Muse Spark 1.1?

Kimi K2 0905 is 2.1x cheaper for input tokens. Kimi K2 0905 costs $0.60/M input and $2.50/M output via novita. Muse Spark 1.1 costs $1.25/M input and $4.25/M output via meta.

What are the context window sizes for Kimi K2 0905 and Muse Spark 1.1?

Kimi K2 0905 supports 262K tokens and Muse Spark 1.1 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 K2 0905 and Muse Spark 1.1?

Key differences include context window (262K vs 1.0M), input pricing ($0.60 vs $1.25/M), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.

Who makes Kimi K2 0905 and Muse Spark 1.1?

Kimi K2 0905 is developed by Moonshot AI and Muse Spark 1.1 is developed by Meta.

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