Comprehensive side-by-side LLM comparison
o1-pro leads with 6.0% higher average benchmark score. Overall, o1-pro is the stronger choice for coding tasks.
Anthropic
Claude Haiku 4.5 continues Anthropic's tradition of fast, efficient models in the fourth generation Claude family. Designed to maintain the hallmark speed and cost-effectiveness of the Haiku line while incorporating advancements from the Claude 4 series, it serves applications requiring rapid processing and quick turnaround times.
OpenAI
o1-pro was developed as an enhanced version of the o1 reasoning model, designed to provide extended reasoning capabilities with greater depth and reliability. Built for professionals and advanced users tackling complex analytical tasks, it offers enhanced thinking time and reasoning quality for the most demanding applications.
10 months newer

o1-pro
OpenAI
2024-12-17

Claude Haiku 4.5
Anthropic
2025-10-15
Context window and performance specifications
Average performance across 1 common benchmarks

Claude Haiku 4.5

o1-pro
o1-pro
2023-09-30
Claude Haiku 4.5
2025-02-01
Available providers and their performance metrics

Claude Haiku 4.5
Anthropic

o1-pro

Claude Haiku 4.5

o1-pro

Claude Haiku 4.5

o1-pro