Claude 3 Sonnet vs GPT-5.4 Pro
Compare Claude 3 Sonnet by Anthropic against GPT-5.4 Pro by OpenAI, tested across 1 shared challenge. Updated April 2026.
Which is better, Claude 3 Sonnet or GPT-5.4 Pro?
Claude 3 Sonnet and GPT-5.4 Pro are both competitive models. Claude 3 Sonnet costs $3/M input tokens vs $30/M for GPT-5.4 Pro. Compare their real outputs side by side below.
Key Differences Between Claude 3 Sonnet and GPT-5.4 Pro
Claude 3 Sonnet is made by anthropic while GPT-5.4 Pro is from openai. On pricing, Claude 3 Sonnet costs $3/M input tokens vs $30/M for GPT-5.4 Pro.
No community votes yet. On paper, GPT-5.4 Pro has the edge — bigger model tier, newer, bigger context window.
Claude 3 Sonnet is 12x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-5.4 Pro uses 745.3x 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.
