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Kimi K3 vs GPT 4o

At a glance
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
OpenAIGPT 4o

OpenAI's original omni model supporting text and image inputs.

63128K ctx$2.50/$10.00 per M#64/92
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
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%Task Horizon—
OpenAIGPT 4o
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI63.0
Reasoning & Knowledge
Graduate Science49.2%Expert-Level2.7%
Math
Math Problems53.3%Competition Math6.4%Research Math0.3%
Coding
Real-World Coding31.0%Code Editing23.1%
Agentic
Terminal Tasks—Task Horizon9min
Specs
MoonshotAIKimi K3
1.0M
Context
16K
Max output
Jul 2026
Released
OpenAIGPT 4o
128K
Context
16K
Max output
May 2024
Released
Capabilities
MoonshotAIKimi K3
Vision
Audio
Reasoning
OpenAIGPT 4o
Vision
Audio
Reasoning
Pricing
MoonshotAIKimi K3
Live pricing, shown before you run
Input$3.00/M tokens
Output$15.00/M tokens
Cache read$0.30/M tokens
OpenAIGPT 4o
Live pricing, shown before you run
Input$2.50/M tokens
Output$10.00/M tokens
Chat with Kimi K3Go to model
Chat with GPT 4oGo to model
Frequently Asked Questions: Kimi K3 vs GPT 4o▼

Which is better, Kimi K3 or GPT 4o?

▼

Both Kimi K3 and GPT 4o 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, Kimi K3 or GPT 4o?

▼

GPT 4o has a lower blended cost. Kimi K3: $3.00 input / $15.00 output. GPT 4o: $2.50 input / $10.00 output.

Which has a larger context window, Kimi K3 or GPT 4o?

▼

Kimi K3 has a larger context window: Kimi K3 supports 1M tokens vs GPT 4o at 128K tokens.

Do both Kimi K3 and GPT 4o support vision?

▼

Yes, both Kimi K3 and GPT 4o support vision/image input.

What are the key differences between Kimi K3 and GPT 4o?

▼

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 Kimi K3 and GPT 4o for free on idapt.app to see which performs better for your specific needs.

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