Kimi K2 vs OpenAI o3 Mini

Side-by-side comparison of pricing, capabilities, benchmarks, and use case fit.

MA

Kimi K2

Moonshot AI

Overall 76

fast

O

OpenAI o3 Mini

OpenAI

Overall 75

reasoning

Capability radar

Normalized coding, reasoning, writing, vision, context, and value

Kimi K2OpenAI o3 Mini

Comparison of Kimi K2 vs OpenAI o3 Mini
Metric	Kimi K2	OpenAI o3 Mini
Input Price / 1M	$0.60	$1.10
Output Price / 1M	$2.50	$4.40
Combined Price / 1M	$3.10	$5.50
Context Window	131,072	200,000
Coding Score	90	90
Reasoning Score	88	91
Vision Score	40	35
Audio	No	No
Streaming	Yes	Yes
Function Calling	Yes	Yes
Latency Tier	fast	reasoning
Release Date	7/11/2025	1/31/2025

Kimi K2 — Strengths & Weaknesses

Strengths

Strong coding
Tool use
Value pricing

Weaknesses

Superseded by Kimi K3 on context/vision

OpenAI o3 Mini — Strengths & Weaknesses

Strengths

Affordable reasoning
Strong math/coding

Weaknesses

No multimodal
Higher latency than GPT-4o

Use Case Verdicts

Coding

Kimi K2 scores 90 vs 90 on coding benchmarks.

General Chat

Kimi K2 leads on writing quality (86 vs 82).

Long Context

OpenAI o3 Mini offers 200K tokens vs 131.1K.

Cost Efficiency

Kimi K2 is cheaper at $3.10/M combined vs $5.50/M.

Enterprise Use

OpenAI o3 Mini combines strong reasoning, tooling, and context for enterprise workloads.

Agent Workflows

Kimi K2 is better suited for agentic workflows with tool use and coding capability.