Claude Sonnet 4.5 vs OpenAI o4 Mini High
Compare Claude Sonnet 4.5 by Anthropic against OpenAI o4 Mini High by OpenAI, context windows of 200K vs 200K, tested across 43 shared challenges. Updated April 2026.
Which is better, Claude Sonnet 4.5 or OpenAI o4 Mini High?
Claude Sonnet 4.5 and OpenAI o4 Mini High are both competitive models. Claude Sonnet 4.5 costs $3/M input tokens vs $1.1/M for OpenAI o4 Mini High. Context windows: 200K vs 200K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Sonnet 4.5 and OpenAI o4 Mini High
Claude Sonnet 4.5 is made by anthropic while OpenAI o4 Mini High is from openai. Claude Sonnet 4.5 has a 200K token context window compared to OpenAI o4 Mini High's 200K. On pricing, Claude Sonnet 4.5 costs $3/M input tokens vs $1.1/M for OpenAI o4 Mini High.
No community votes yet. On paper, Claude Sonnet 4.5 has the edge — bigger model tier, newer.
OpenAI o4 Mini High is 3.4x cheaper per token — worth considering if cost matters.
Style Comparison
Claude Sonnet 4.5 uses 490.1x more bold
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
