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o1 vs Claude 4.5 Sonnet

Detailed comparison of capabilities, features, and performance.

Feature
o1
Claude 4.5 Sonnet
Model Image
o1
Claude 4.5 Sonnet
AI Lab
OpenAI
Anthropic
Context Size
128,000 tokens
1,000,000 tokens
Max Output Size
100,000 tokens
64,000 tokens
Frontier Model
Yes
Yes
Vision Support
No
Yes
Description
o1 is OpenAI's new reasoning model for complex tasks that require broad general knowledge
The latest Claude 4.5 Sonnet model from Anthropic with a 1M token context window.

Learn more about o1

View detailed specifications and capabilities

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Learn more about Claude 4.5 Sonnet

View detailed specifications and capabilities

View model details →

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