Kimi K2 0905 is the September update of [Kimi K2 0711](moonshotai/kimi-k2). It is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32 billion active per forward pass.…
Model details →MoonshotAI: Kimi K2 0905 (exacto) vs OpenAI: o3 Mini
MoonshotAI: Kimi K2 0905 (exacto) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
OpenAI o3-mini is a cost-efficient language model optimized for STEM reasoning tasks, particularly excelling in science, mathematics, and coding. This model supports the `reasoning_effort` parameter, which can be set to "high", "medium", o…
Model details →Side-by-side comparison
| Capability | MoonshotAI: Kimi K2 0905 (exacto) | OpenAI: o3 Mini | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 262K | 200K | 🏆 MoonshotAI: Kimi K2 0905 (exacto) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.60 | $1.10 | 🏆 MoonshotAI: Kimi K2 0905 (exacto) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $2.50 | $4.40 | 🏆 MoonshotAI: Kimi K2 0905 (exacto) |
| 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 | 🏆 OpenAI: o3 Mini |
Frequently asked questions
Is MoonshotAI: Kimi K2 0905 (exacto) better than OpenAI: o3 Mini?
MoonshotAI: Kimi K2 0905 (exacto) 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 0905 (exacto) and OpenAI: o3 Mini?
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 0905 (exacto) and OpenAI: o3 Mini support?
MoonshotAI: Kimi K2 0905 (exacto) supports up to 262K tokens. OpenAI: o3 Mini supports up to 200K tokens.
Do both MoonshotAI: Kimi K2 0905 (exacto) and OpenAI: o3 Mini support tool calling?
MoonshotAI: Kimi K2 0905 (exacto): yes. OpenAI: o3 Mini: yes.