Claude 4.5 Opus vs o3-mini

Detailed comparison of capabilities, features, and performance.

Claude 4.5 Opus

Claude 4.5 Opus

Anthropic
VS
o3-mini

o3-mini

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

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