ChatGPT-4o (March 2025) vs Claude 3 Sonnet
Compare ChatGPT-4o (March 2025) by OpenAI against Claude 3 Sonnet by Anthropic, tested across 7 shared challenges. Updated April 2026.
Which is better, ChatGPT-4o (March 2025) or Claude 3 Sonnet?
ChatGPT-4o (March 2025) and Claude 3 Sonnet are both competitive models. ChatGPT-4o (March 2025) costs $5/M input tokens vs $3/M for Claude 3 Sonnet. Compare their real outputs side by side below.
Key Differences Between ChatGPT-4o (March 2025) and Claude 3 Sonnet
ChatGPT-4o (March 2025) is made by openai while Claude 3 Sonnet is from anthropic. On pricing, ChatGPT-4o (March 2025) costs $5/M input tokens vs $3/M for Claude 3 Sonnet.
No community votes yet. On paper, ChatGPT-4o (March 2025) has the edge — bigger model tier, newer, bigger context window.
Style Comparison
ChatGPT-4o (March 2025) uses 329.7x 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.
