Model Comparison

Kimi K3 vs Muse Spark 1.1Which is better in 2026?

Muse Spark 1.1 has a slight edge in benchmark performance. Muse Spark 1.1 is 3.0x cheaper per token.

Verdict: Kimi K3 vs Muse Spark 1.1 — which is better?

Kimi K3 (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.

Kimi K3 outperforms in 3 benchmarks (BabyVision, CharXiv-R, Terminal-Bench 2.1), while Muse Spark 1.1 is better at 4 benchmarks (Humanity's Last Exam, Job Bench, MCP Atlas, Toolathlon). Muse Spark 1.1 has a slight edge in benchmark performance.

On price, Muse Spark 1.1 is roughly 3.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Kimi K3 if…

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

Choose Muse Spark 1.1 if…

  • you want the strongest raw capability — it leads on 4 of 7 shared benchmarks
  • cost matters — it's about 3.0x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Kimi K3 outperforms in 3 benchmarks (BabyVision, CharXiv-R, Terminal-Bench 2.1), while Muse Spark 1.1 is better at 4 benchmarks (Humanity's Last Exam, Job Bench, MCP Atlas, Toolathlon).

Muse Spark 1.1 has a slight edge in benchmark performance.

Sat Jul 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Muse Spark 1.1 costs less

For input processing, Kimi K3 ($3.00/1M tokens) is 2.4x more expensive than Muse Spark 1.1 ($1.25/1M tokens).

For output processing, Kimi K3 ($15.00/1M tokens) is 3.5x more expensive than Muse Spark 1.1 ($4.25/1M tokens).

In conclusion, Kimi K3 is more expensive than Muse Spark 1.1.*

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

Lowest available price from all providers
Sat Jul 18 2026 • llm-stats.com
Moonshot AI
Kimi K3
Input tokens$3.00
Output tokens$15.00
Best providerUnknown Organization
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

Both models have the same input context window of 1,048,576 tokens. Kimi K3 can generate longer responses up to 1,048,576 tokens, while Muse Spark 1.1 is limited to 131,072 tokens.

Moonshot AI
Kimi K3
Input1,048,576 tokens
Output1,048,576 tokens
Meta
Muse Spark 1.1
Input1,048,576 tokens
Output131,072 tokens
Sat Jul 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Kimi K3 and Muse Spark 1.1 support multimodal inputs.

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

Kimi K3

Text
Images
Audio
Video

Muse Spark 1.1

Text
Images
Audio
Video

Release Timeline

When each model was launched

Kimi K3 was released on 2026-07-16, while Muse Spark 1.1 was released on 2026-07-09.

Kimi K3 is 0 month newer than Muse Spark 1.1.

Kimi K3

Jul 16, 2026

2 days ago

1w newer
Muse Spark 1.1

Jul 9, 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 K3 is available from Moonshot AI. Muse Spark 1.1 is available from Meta Model API.

Kimi K3

moonshot logo
Unknown Organization
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

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

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Key Takeaways

Moonshot AI
Has open weights
Higher BabyVision score (85.7% vs 76.3%)
Higher CharXiv-R score (91.3% vs 88.4%)
Higher Terminal-Bench 2.1 score (88.3% vs 80.0%)
Meta
Less expensive input tokens
Less expensive output tokens
Higher Humanity's Last Exam score (62.1% vs 56.0%)
Higher Job Bench score (54.7% vs 52.9%)
Higher MCP Atlas score (88.1% vs 84.2%)
Higher Toolathlon score (75.6% vs 73.2%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Kimi K3 and Muse Spark 1.1 side-by-side, then vote on the output you prefer.

Kimi K3
✓ Preferred
Muse Spark 1.1
Open in Playground
AI Model Comparison Table
Feature
Moonshot AI
Kimi K3
Meta
Muse Spark 1.1

FAQ

Common questions about Kimi K3 vs Muse Spark 1.1.

Which is better, Kimi K3 or Muse Spark 1.1?

Muse Spark 1.1 has a slight edge in benchmark performance. Kimi K3 is made by Moonshot AI and Muse Spark 1.1 is made by Meta. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Kimi K3 compare to Muse Spark 1.1 in benchmarks?

Kimi K3 scores MathVision: 97.8%, DeepSearchQA: 95.0%, GPQA: 93.5%, CharXiv-R: 91.3%, BrowseComp: 91.2%. 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 K3 cheaper than Muse Spark 1.1?

Muse Spark 1.1 is 2.4x cheaper for input tokens. Kimi K3 costs $3.00/M input and $15.00/M output via moonshot. Muse Spark 1.1 costs $1.25/M input and $4.25/M output via meta.

What are the context window sizes for Kimi K3 and Muse Spark 1.1?

Kimi K3 supports 1.0M 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 K3 and Muse Spark 1.1?

Key differences include input pricing ($3.00 vs $1.25/M), licensing (Unknown vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Kimi K3 and Muse Spark 1.1?

Kimi K3 is developed by Moonshot AI and Muse Spark 1.1 is developed by Meta.

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