Key Differences
- •Sonnet 4 has a larger context window (1M vs 400k tokens)
- •GPT-5.2 Pro has more recent training data (Aug 2025 vs Jan 2025)
- •Sonnet 4 is more affordable for input ($3.00 vs $21.00/1M tokens)
- •Sonnet 4 is more affordable for output ($15.00 vs $168.00/1M tokens)
- •GPT-5.2 Pro is newer (released Dec 2025)
400k tokens
Context
1M tokens
Aug 2025
Knowledge
Jan 2025
Dec 2025
Released
May 2025
$21.00/1M
Input
$3.00/1M
$168.00/1M
Output
$15.00/1M
Both GPT-5.2 Pro and Sonnet 4 are available on Zo Computer. Try them both to see which one works best for your use case.