Claude Sonnet 5 vs GPT-5.3-Codex for workflow automation

# The honest answer

Automating the three-step signoff will make claims move faster through the same three approvals — but it doesn't fix the actual problem, which is that a £14 train fare and (presumably) a £4,000 supplier invoice go through an identical process. You'd be building faster rails for a train that shouldn't be running this route at all. Nine days will become nine minutes, everyone will feel relieved, and in a year someone will notice the workflow tool is now the thing enforcing triple-signoff on tea and biscuits, and nobody will r…

**Honest answer:**  
Don’t automate this exact 3-signature chain.  
If you do, you’ll just get a faster version of a bad control design: low-risk claims still queue behind three people, and you’ll still pay £14 fares late.

You’d be **making the wrong thing efficient**.

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The question to answer is:

> **“What is the minimum approval/control model that protects charity funds and trustee duties, while getting legitimate expenses paid quickly?”**

Not: “How do we route every claim through three signatures faster?”

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## What good design loo…