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DeepSeek V4.1 Flash vs Kimi K3

At a glance

DeepSeek's cost-efficient V4.1 tier and the first model built on the Causal Encoder-Decoder (CED) architecture: a 552B MoE activating 8B parameters on input and 16B on output.

1.0M ctx$0.03/$0.50 per M

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

1.0M ctx$0.44/$10.00 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
Cheaper95%
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
Sep 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
Input93%$0.03/M tokens
Output95%$0.50/M tokens
Cache read98%$0.01/M tokens
Live pricing, shown before you run
Input$0.44/M tokens
Output$10.00/M tokens
Cache read$0.44/M tokens
Chat with DeepSeek V4.1 FlashGo to model
Chat with Kimi K3Go to model
Frequently Asked Questions: DeepSeek V4.1 Flash vs Kimi K3▼

Which is better, DeepSeek V4.1 Flash or Kimi K3?

▼

Both DeepSeek V4.1 Flash 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, DeepSeek V4.1 Flash or Kimi K3?

▼

DeepSeek V4.1 Flash has a lower blended cost. DeepSeek V4.1 Flash: $0.03 input / $0.50 output. Kimi K3: $0.44 input / $10.00 output.

Which has a larger context window, DeepSeek V4.1 Flash or Kimi K3?

▼

DeepSeek V4.1 Flash has a larger context window: DeepSeek V4.1 Flash supports 1M tokens vs Kimi K3 at 1M tokens.

Do both DeepSeek V4.1 Flash and Kimi K3 support vision?

▼

Yes, both DeepSeek V4.1 Flash and Kimi K3 support vision/image input.

What are the key differences between DeepSeek V4.1 Flash and Kimi K3?

▼

Key differences: DeepSeek V4.1 Flash 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 DeepSeek V4.1 Flash and Kimi K3 for free on idapt.app to see which performs better for your specific needs.

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