Claude 3 Sonnet vs OpenAI Codex Mini
Compare Claude 3 Sonnet by Anthropic against OpenAI Codex Mini by OpenAI, tested across 3 shared challenges. Updated April 2026.
Which is better, Claude 3 Sonnet or OpenAI Codex Mini?
Claude 3 Sonnet and OpenAI Codex Mini are both competitive models. Claude 3 Sonnet costs $3/M input tokens vs $1.5/M for OpenAI Codex Mini. Compare their real outputs side by side below.
Key Differences Between Claude 3 Sonnet and OpenAI Codex Mini
Claude 3 Sonnet is made by anthropic while OpenAI Codex Mini is from openai. On pricing, Claude 3 Sonnet costs $3/M input tokens vs $1.5/M for OpenAI Codex Mini.
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
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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.
