o4-mini vs Claude 4.5 Sonnet (thinking)

Detailed comparison of capabilities, features, and performance.

o4-mini

o4-mini

OpenAI
VS
Claude 4.5 Sonnet (thinking)

Claude 4.5 Sonnet (thinking)

Anthropic
Feature o4-mini Claude 4.5 Sonnet (thinking)
AI Lab OpenAI Anthropic
Context Size 200,000 tokens 1,000,000 tokens
Max Output Size 100,000 tokens 64,000 tokens
Frontier Model Yes Yes
Vision Support Yes Yes
Description The latest o-series model. Optimized for fast & effective reasoning. Best for coding and visual tasks. The latest Claude 4.5 Sonnet model from Anthropic with maximum reasoning enabled, 200k reasoning tokens in 1M context.

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