Comprehensive side-by-side LLM comparison
o1-preview leads with 12.7% higher average benchmark score. o1-preview is available on 2 providers. Overall, o1-preview is the stronger choice for coding tasks.
Moonshot AI
Kimi K2 Base was created as the foundation model in the K2 series, designed to serve as a starting point for fine-tuning and customization. Built to provide strong base capabilities for domain-specific applications, it enables developers to build specialized solutions on Moonshot's architecture.
OpenAI
o1-preview was introduced as an early version of OpenAI's reasoning model series, designed to demonstrate the potential of AI models that engage in extended thinking before responding. Built to solve complex problems through deliberate reasoning processes, it represented an initial step toward more thoughtful and analytical AI systems.
10 months newer

o1-preview
OpenAI
2024-09-12

Kimi K2 Base
Moonshot AI
2025-07-11
Context window and performance specifications
Average performance across 4 common benchmarks

Kimi K2 Base

o1-preview
Available providers and their performance metrics

Kimi K2 Base

o1-preview
Azure

Kimi K2 Base

o1-preview

Kimi K2 Base

o1-preview
OpenAI