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GPT 4.1 vs Kimi K3

At a glance
OpenAIGPT 4.1

OpenAI's flagship GPT-4.1 with advanced instruction following and long context.

701.0M ctx$2.00/$8.00 per M#55/92
MoonshotAIKimi K3

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

1.0M ctx$3.00/$15.00 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
OpenAIGPT 4.1
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI70.4
Reasoning & Knowledge
Graduate Science66.9%Expert-Level5.4%
Math
Math Problems83.0%Competition Math38.3%Research Math5.5%
Coding
Real-World Coding48.5%Code Editing52.4%
Agentic
Terminal Tasks—Novel Reasoning0.4%
MoonshotAIKimi K3
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-16
Capability
Capability—
Reasoning & Knowledge
Graduate Science93.5%Expert-Level43.5%
Math
Math Problems—Competition Math—Research Math—
Coding
Real-World Coding—Code Editing—
Agentic
Terminal Tasks88.3%Novel Reasoning—
Specs
OpenAIGPT 4.1
1.0M
Context
16K
Max output
Apr 2025
Released
MoonshotAIKimi K3
1.0M
Context
16K
Max output
Jul 2026
Released
Capabilities
OpenAIGPT 4.1
Vision
Audio
Reasoning
MoonshotAIKimi K3
Vision
Audio
Reasoning
Pricing
OpenAIGPT 4.1
Live pricing, shown before you run
Input$2.00/M tokens
Output$8.00/M tokens
Cache read$0.50/M tokens
Web search$0.01/search
MoonshotAIKimi K3
Live pricing, shown before you run
Input$3.00/M tokens
Output$15.00/M tokens
Cache read$0.30/M tokens
Chat with GPT 4.1Go to model
Chat with Kimi K3Go to model
Frequently Asked Questions: GPT 4.1 vs Kimi K3▼

Which is better, GPT 4.1 or Kimi K3?

▼

Both GPT 4.1 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, GPT 4.1 or Kimi K3?

▼

GPT 4.1 has a lower blended cost. GPT 4.1: $2.00 input / $8.00 output. Kimi K3: $3.00 input / $15.00 output.

Which has a larger context window, GPT 4.1 or Kimi K3?

▼

Kimi K3 has a larger context window: GPT 4.1 supports 1M tokens vs Kimi K3 at 1M tokens.

Do both GPT 4.1 and Kimi K3 support vision?

▼

Yes, both GPT 4.1 and Kimi K3 support vision/image input.

What are the key differences between GPT 4.1 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 GPT 4.1 and Kimi K3 for free on idapt.app to see which performs better for your specific needs.

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