Key Differences
- •GPT-5.5 has a larger context window (1.1M vs 400k tokens)
- •GPT-5.5 has more recent training data (Dec 2025 vs Sep 2024)
- •GPT-5.1 Codex mini is more affordable for input ($0.25 vs $5.00/1M tokens)
- •GPT-5.1 Codex mini is more affordable for output ($2.00 vs $30.00/1M tokens)
- •GPT-5.5 is newer (released Apr 2026)
1.1M tokens
Context
400k tokens
Dec 2025
Knowledge
Sep 2024
Apr 2026
Released
Nov 2025
$5.00/1M
Input
$0.25/1M
$30.00/1M
Output
$2.00/1M
Both GPT-5.5 and GPT-5.1 Codex mini are available on Zo Computer. Try them both to see which one works best for your use case.