Key Differences
- •GPT-5.5 has a larger context window (1.1M vs 1M tokens)
- •GPT-5.5 has more recent training data (Dec 2025 vs Aug 2025)
- •GPT-5.4 is more affordable for input ($2.50 vs $5.00/1M tokens)
- •GPT-5.4 is more affordable for output ($15.00 vs $30.00/1M tokens)
- •GPT-5.5 is newer (released Apr 2026)
1M tokens
Context
1.1M tokens
Aug 2025
Knowledge
Dec 2025
Mar 2026
Released
Apr 2026
$2.50/1M
Input
$5.00/1M
$15.00/1M
Output
$30.00/1M
Both GPT-5.4 and GPT-5.5 are available on Zo Computer. Try them both to see which one works best for your use case.