2025-08-08: New GPT-5 Model and davehudson.io maintenance prompt

Published: 2025-08-08

A new GPT-5 model was released yesterday so I updating Humbug to support it. I also added a new Metaphor prompt for helping me with the davehudson.io site.

New GPT-5 Model

GPT-5 dropped yesterday and I've updated Humbug to support it. I also removed the now-deprecated GPT-4.5 model.

My first impressions are that it's pretty annoying for most of what I do. It required identity verification to use it and that's goint to cause friction for a lot of users. It also insists on using "thinking" and that makes it slow. My usual test of "check file <x> and tell me how long ago it was last modified" requires 3 tool calls and takes Claude Sonnet about 10-15 seconds. With GPT-5-nano this was 19 seconds, GPT-5-mini took 69 seconds, while GPT-5 took 76 seconds! This might be teething issues, but it's not a great start.

The model also rejects temperature settings so it's not possible to dial back creativity for deterministic tasks. Pretty sure this will break a lot of other people's workflows.

Metaphor prompt for adding notes to davehudson.io

I added a new Metaphor prompt to help me with the davehudson.io site. It's designed to generate new notes pages within the site. I quite like this as it's an annoying task to do manually:

Metaphor context describing the davehudson.io site
Metaphor prompt to generate a new notes page for "today"