Claude 4.5 Sonnet vs o3-mini

Detailed comparison of capabilities, features, and performance.

Claude 4.5 Sonnet

Claude 4.5 Sonnet

Anthropic
VS
o3-mini

o3-mini

OpenAI
Feature Claude 4.5 Sonnet o3-mini
AI Lab Anthropic OpenAI
Context Size 1,000,000 tokens 200,000 tokens
Max Output Size 64,000 tokens 100,000 tokens
Frontier Model Yes Yes
Vision Support Yes No
Description The latest Claude 4.5 Sonnet model from Anthropic with a 1M token context window. o3-mini is a fast cost-efficient reasoning model tailored to coding math and science use cases

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