Key Differences
- •GPT-5.1 Codex mini has a larger context window (400k vs 200k tokens)
- •Haiku 4.5 has more recent training data (Feb 2025 vs Sep 2024)
- •GPT-5.1 Codex mini is more affordable for input ($0.25 vs $1.00/1M tokens)
- •GPT-5.1 Codex mini is more affordable for output ($2.00 vs $5.00/1M tokens)
- •GPT-5.1 Codex mini is newer (released Nov 2025)
400k tokens
Context
200k tokens
Sep 2024
Knowledge
Feb 2025
Nov 2025
Released
Oct 2025
$0.25/1M
Input
$1.00/1M
$2.00/1M
Output
$5.00/1M
Both GPT-5.1 Codex mini and Haiku 4.5 are available on Zo Computer. Try them both to see which one works best for your use case.