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Muse Spark Open vs Kimi K3

At a glance

Meta's strongest open-weight model, trained specifically for agentic coding workflows.

1.0M ctx$1.25/$4.25 per M

MoonshotAI's 2.8T-parameter flagship for complex coding, knowledge work, and long-horizon agent runs.

1.0M ctx$0.30/$11.94 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper38%
Reasoning & Knowledge
Graduate Science—Expert-Level—Factual Recall—
Math
Competition Math—
Agentic
Terminal Tasks—Novel Reasoning—
Reasoning
CodingInsufficient data
Sources:Epoch AI·Provider·OpenRouter· as of 2026-10-02
Reasoning & Knowledge
Graduate Science93.5%Expert-Level43.5%Factual Recall50.6%
Math
Competition Math97.2%
Agentic
Terminal Tasks88.3%Novel Reasoning60.4%
Specs
1.0M
Context
256K
Max output
Oct 2026
Released
1.0M
Context
256K
Max output
Jul 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$1.25/M tokens
Output64%$4.25/M tokens
Cache read29%$0.15/M tokens
Live pricing, shown before you run
Input76%$0.30/M tokens
Output$11.94/M tokens
Cache read$0.21/M tokens
Chat with Muse Spark OpenGo to model
Chat with Kimi K3Go to model
Frequently Asked Questions: Muse Spark Open vs Kimi K3▼

Which is better, Muse Spark Open or Kimi K3?

▼

Both Muse Spark Open and Kimi K3 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Muse Spark Open or Kimi K3?

▼

Muse Spark Open has a lower blended cost. Muse Spark Open: $1.25 input / $4.25 output. Kimi K3: $0.30 input / $11.94 output.

Which has a larger context window, Muse Spark Open or Kimi K3?

▼

Muse Spark Open has a larger context window: Muse Spark Open supports 1M tokens vs Kimi K3 at 1M tokens.

Do both Muse Spark Open and Kimi K3 support vision?

▼

Yes, both Muse Spark Open and Kimi K3 support vision/image input.

What are the key differences between Muse Spark Open and Kimi K3?

▼

Key differences: Kimi K3 is significantly cheaper. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Muse Spark Open and Kimi K3 for free on idapt.app to see which performs better for your specific needs.

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