Key Differences
- •GPT-5.4 has a larger context window (1M vs 400k tokens)
- •GPT-5.4 has more recent training data (Aug 2025 vs Sep 2024)
- •GPT-5.1 Codex mini is more affordable for input ($0.25 vs $2.50/1M tokens)
- •GPT-5.1 Codex mini is more affordable for output ($2.00 vs $15.00/1M tokens)
- •GPT-5.4 is newer (released Mar 2026)
1M tokens
Context
400k tokens
Aug 2025
Knowledge
Sep 2024
Mar 2026
Released
Nov 2025
$2.50/1M
Input
$0.25/1M
$15.00/1M
Output
$2.00/1M
Both GPT-5.4 and GPT-5.1 Codex mini are available on Zo Computer. Try them both to see which one works best for your use case.