o4-mini vs Claude 4.5 Sonnet (thinking)

Detailed comparison of capabilities, features, and performance.

Feature
o4-mini
Claude 4.5 Sonnet (thinking)
Model Image
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
200,000 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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