User says Codex botched a cryptography task and replaced a Merkle tree with comparisons
chaumian · x · 2026-07-24
One user says Codex performs poorly on cryptography-heavy work and tends to generate very inefficient code.
In a simple tool they built with Claude, switching to Codex reportedly caused it to delete a crucial Merkle tree construction and replace it with thousands of comparisons.
Related event: Codex Struggles with Cryptography, Generates Inefficient Code(2 posts)→
More from coding & agent
- BELL: Open-Source Stack Combines Browserbase, Eve, iMessage and Stripe Link for Personal Agents — jeff_weinstein · 2026-10-27
- Two engineers rebuilt a FedEx supplier's billing core in 3.5 months vs an estimated 7-8 — alex_verem · 2026-10-27
- GPT-6.1 Terra gains ~20 points on Terminal-Bench 4.0, rivalling GPT-6.1 Sol — ArtificialAnlys · 2026-10-27
- GPT-6.1 Terra scores 48 on AA Coding Agent Index at one-third the cost of GPT-5.6 Terra — ArtificialAnlys · 2026-10-27
- Shift-1 router cuts coding agent spend up to 55% while keeping SWE-bench accuracy — ypatil125 · 2026-10-27
- Non-coder vibe-codes a Godot JRPG with Claude Code in two weeks, music and art synced — ADHDavid · 2026-10-27