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Mistral Small 3.1 vs Kimi K3

At a glance

Previous Mistral Small with vision support and 128K context.

128K ctx$0.35/$0.55 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
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper87%
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
128K
Context
102K
Max output
Mar 2025
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$0.35/M tokens
Output95%$0.55/M tokens
Live pricing, shown before you run
Input13%$0.30/M tokens
Output$11.94/M tokens
Cache read$0.21/M tokens
Chat with Mistral Small 3.1Go to model
Chat with Kimi K3Go to model
Frequently Asked Questions: Mistral Small 3.1 vs Kimi K3▼

Which is better, Mistral Small 3.1 or Kimi K3?

▼

Both Mistral Small 3.1 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, Mistral Small 3.1 or Kimi K3?

▼

Mistral Small 3.1 has a lower blended cost. Mistral Small 3.1: $0.35 input / $0.55 output. Kimi K3: $0.30 input / $11.94 output.

Which has a larger context window, Mistral Small 3.1 or Kimi K3?

▼

Kimi K3 has a larger context window: Mistral Small 3.1 supports 128K tokens vs Kimi K3 at 1M tokens.

Do both Mistral Small 3.1 and Kimi K3 support vision?

▼

Yes, both Mistral Small 3.1 and Kimi K3 support vision/image input.

What are the key differences between Mistral Small 3.1 and Kimi K3?

▼

Key differences: only Kimi K3 offers extended reasoning mode. 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 Mistral Small 3.1 and Kimi K3 for free on idapt.app to see which performs better for your specific needs.

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