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o3-mini (High) vs Kimi K3

At a glance
OpenAIo3-mini (High)

o3-mini with reasoning effort set to high for maximum STEM accuracy.

74200K ctx$1.10/$4.40 per M#45/92
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
OpenAIo3-mini (High)
Reasoning
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI73.9
Reasoning & Knowledge
Graduate Science77.0%Expert-Level—
Math
Math Problems96.5%Competition Math76.9%Research Math12.4%
Coding
Code Editing60.4%
Agentic
Terminal Tasks—Novel Reasoning3.0%
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
Code Editing—
Agentic
Terminal Tasks88.3%Novel Reasoning—
Specs
OpenAIo3-mini (High)
200K
Context
100K
Max output
Feb 2025
Released
MoonshotAIKimi K3
1.0M
Context
16K
Max output
Jul 2026
Released
Capabilities
OpenAIo3-mini (High)
Vision
Audio
Reasoning
MoonshotAIKimi K3
Vision
Audio
Reasoning
Pricing
OpenAIo3-mini (High)
Live pricing, shown before you run
Input$1.10/M tokens
Output$4.40/M tokens
Cache read$0.55/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 o3-mini (High)Go to model
Chat with Kimi K3Go to model
Frequently Asked Questions: o3-mini (High) vs Kimi K3▼

Which is better, o3-mini (High) or Kimi K3?

▼

Both o3-mini (High) 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, o3-mini (High) or Kimi K3?

▼

o3-mini (High) has a lower blended cost. o3-mini (High): $1.10 input / $4.40 output. Kimi K3: $3.00 input / $15.00 output.

Which has a larger context window, o3-mini (High) or Kimi K3?

▼

Kimi K3 has a larger context window: o3-mini (High) supports 200K tokens vs Kimi K3 at 1M tokens.

Do both o3-mini (High) and Kimi K3 support vision?

▼

Kimi K3 supports vision/image input, but o3-mini (High) does not.

What are the key differences between o3-mini (High) and Kimi K3?

▼

Key differences: o3-mini (High) is significantly cheaper; only Kimi K3 supports vision input. 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 o3-mini (High) and Kimi K3 for free on idapt.app to see which performs better for your specific needs.

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