GPT-4o mini vs Claude 4.5 Sonnet (thinking)

Detailed comparison of capabilities, features, and performance.

GPT-4o mini

GPT-4o mini

OpenAI
VS
Claude 4.5 Sonnet (thinking)

Claude 4.5 Sonnet (thinking)

Anthropic
Feature GPT-4o mini Claude 4.5 Sonnet (thinking)
AI Lab OpenAI Anthropic
Context Size 128,000 tokens 1,000,000 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 Claude 4.5 Sonnet model from Anthropic with maximum reasoning enabled, 200k reasoning tokens in 1M context.

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