Kimi K2 Thinking is Moonshot AI’s most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning. Built on the trillion-parameter Mixture-of-Experts (MoE) architecture introduced in...
Model details →MoonshotAI: Kimi K2 Thinking vs OpenAI: o3 Mini High
MoonshotAI: Kimi K2 Thinking wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
OpenAI o3-mini-high is the same model as [o3-mini](/openai/o3-mini) with reasoning_effort set to high. o3-mini is a cost-efficient language model optimized for STEM reasoning tasks, particularly excelling in science, mathematics, and...
Model details →Side-by-side comparison
| Capability | MoonshotAI: Kimi K2 Thinking | OpenAI: o3 Mini High | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 262K | 200K | 🏆 MoonshotAI: Kimi K2 Thinking |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.60 | $1.10 | 🏆 MoonshotAI: Kimi K2 Thinking |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $2.50 | $4.40 | 🏆 MoonshotAI: Kimi K2 Thinking |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | — | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is MoonshotAI: Kimi K2 Thinking better than OpenAI: o3 Mini High?
MoonshotAI: Kimi K2 Thinking wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between MoonshotAI: Kimi K2 Thinking and OpenAI: o3 Mini High?
Input: $0.60 vs $1.10 per 1M tokens. Output: $2.50 vs $4.40 per 1M tokens.
What context windows do MoonshotAI: Kimi K2 Thinking and OpenAI: o3 Mini High support?
MoonshotAI: Kimi K2 Thinking supports up to 262K tokens. OpenAI: o3 Mini High supports up to 200K tokens.
Do both MoonshotAI: Kimi K2 Thinking and OpenAI: o3 Mini High support tool calling?
MoonshotAI: Kimi K2 Thinking: yes. OpenAI: o3 Mini High: yes.