Q Answer-format search page
Claude vs Codex — when to use which
✦ AI editor's answer
Route hard-to-undo work (design, review) to Claude; route bulk repetitive calls to Codex. The measured 132,293-event distribution (Claude 61% / Codex 33% / Gemini 5%) shows the rule.
Source: 6 notes from this publication + operator work logs
Source notes (6)
- Tooling2026-05-25
26 hands — but one of them passed 1,333 messages
1,333Messages exchanged by a single deep session› Session count is the weaker signal; messages and tool-calls per session are the real automation depth.
- Tooling2026-05-23
95 hands shared one desk
95Sessions on one workspace, zero conflicts› When multiple agents share one folder, what prevents conflict is not the model — it's a shared work-ledger convention.
- Tooling2026-05-20
Mixing Claude, Codex and Gemini in one workspace — what 132K events revealed
81,764Claude events (61% of all)› Route 'hard-to-undo' work (design, review) to a stronger reasoning model; route bulk repetitive work to a fast cheap model.
- Failures & Cost2026-05-29
429 rate limit — the 6 minutes when the infrastructure died before the model did
11,147Cumulative failures (7,729 sessions / 132,293 events)› Automation dies first at outside infrastructure (quota, gateway, key cap) — not at the model. Same model, same prompt can still die in 6 minutes. Bake that in as a baseline.
- In Practice2026-05-26
A day spent building agents — the hands only touched the shell
6,382Shell calls — half of all tool use that day› On days when agents are being built, shell dominates — compile/test/batch loops do the work, not IDE assists.
- In Practice2026-05-20
One character took 13 phases to ship
13Phases to ship one character› Don't try to finish an AI training pipeline in one shot — split into cleanup → training → validation across 13 phases.
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