← All comparisons
| Spec | 🧠 o3 | 🧠 Kimi K2.5 |
|---|---|---|
| Provider | OpenAI | Moonshot AI |
| Category | 🧠 Reasoning | 🧠 Reasoning |
| Parameters | Undisclosed | 1.0T |
| Context Window | 200K tokens | 128K tokens |
| License | 🔒 proprietary | 🔓 open |
| Input Price | $10 | $0.60 |
| Output Price | $40 | $2.40 |
| API Available | ✅ | ✅ |
| Released | Apr 16, 2025 | Jul 1, 2025 |
| Trending Score | 🔥 91 | 🔥 81 |
o3 Strengths
- ✓Top-tier reasoning
- ✓PhD-level math/science
- ✓Strong at competitive coding
- ✓Deep analysis
Kimi K2.5 Strengths
- ✓1T+ parameters (MoE)
- ✓Open weights
- ✓Strong reasoning
- ✓Good coding
About o3
OpenAI's most powerful reasoning model. Uses chain-of-thought to solve complex math, science, and coding problems.
View full details →About Kimi K2.5
1T+ MoE architecture with strong long-context and multi-step reasoning. Open weights, competitive with top models.
View full details →❓ Frequently Asked Questions
Which is better, o3 or Kimi K2.5?
It depends on your use case. o3 (OpenAI) has a trending score of 91, while Kimi K2.5 (Moonshot AI) scores 81. o3 costs $10 per 1M input tokens. Check the comparison table above for detailed specs.
Is o3 cheaper than Kimi K2.5?
o3 costs $10 input / $40 output per 1M tokens, while Kimi K2.5 costs $0.60 input / $2.40 output.
Can I use both o3 and Kimi K2.5?
Yes! Many developers use multiple models for different tasks. You might use one for complex reasoning and another for high-volume, cost-sensitive workloads.