GPT-4o mini vs Claude 4.5 Opus

Detailed comparison of capabilities, features, and performance.

GPT-4o mini

GPT-4o mini

OpenAI
VS
Claude 4.5 Opus

Claude 4.5 Opus

Anthropic
Feature GPT-4o mini Claude 4.5 Opus
AI Lab OpenAI Anthropic
Context Size 128,000 tokens 200,000 tokens
Max Output Size 16,384 tokens 64,000 tokens
Frontier Model No Yes
Vision Support Yes Yes
Description OpenAI's affordable and intelligent small model for fast lightweight tasks The latest Opus 4.5 model from Anthropic

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