A month of social posts, custom GPTs retiring and a Copilot meter
Archive · Issue of 18 September 2026
Grüezi, bonjour, buongiorno.
This week is about getting seen: a month of social posts, written and scheduled in one sitting. In the news, two tools many of you pay for changed the rules, and Switzerland’s own AI model got a lot easier to try.
The big three
1. OpenAI is retiring custom GPTs On 11 September OpenAI said it will retire custom GPTs across all ChatGPT plans and offer a move to “plugins”. Retirement dates are to follow. So what for your business? List the GPTs your team uses now and who built them. Only creators can migrate them. Update, October 2026: no new GPTs after 26 October; standard plans lose them on 11 December. Read more
2. Microsoft adds a pay-per-use meter to Copilot Business On 16 September Microsoft told resellers that new Copilot Business licences bought from 2 November will have usage-based billing switched on by default, charged in credits on top of the per-user price. So what for your business? Buying Copilot through your IT partner? Ask whether the meter is on and set your own monthly cap. Update, October 2026: the start moved to 1 December. Read more
3. Swiss model Apertus now inside Proton’s Lumo On 17 September ETH Zurich announced that Apertus 1.5, built by EPFL, ETH Zurich and CSCS, is now a model option in Lumo, the AI assistant from Geneva-based Proton. Proton says chats stay encrypted. So what for your business? The easiest way yet to test a Swiss-built model on your own weekly tasks. No setup, free account. Read more
🔒 This week’s guide
A month of social posts in one afternoon. Plan twelve posts on one page, let your AI assistant draft them, design them in Canva and schedule the lot. About 3.5 hours the first time, 2 hours after that. Includes the photo-consent check most firms skip. Read the guide (Members)
🔒 Tool review
Canva AI (Magic Studio): worth CHF 128 a year if someone in your team posts every week. Skip the upgrade if you post a few times a month. Read the review (Members)
🔍 Feature deep dive 🔒 Members
Gemini image editing (Nano Banana 2). Upload a phone photo of your product, describe the background and light you want, and download a post-ready version. Works on the free plan. Plus the prompts, the watermark rules and when to label an AI-edited image. Read the deep dive (Members)
🧩 Skills of the week 🔒 Members
- Social month planner: a month of posts from a few facts about your business, in your tone, per platform.
- Content repurposer: one blog post or customer story becomes 5 to 8 posts and a short email, facts unchanged.
Install once in Claude or ChatGPT. Get the skills (Members)
🔒 Template of the week
Content calendar and social prompt pack. A one-page calendar for twelve posts, six prompts that turn it into drafts, and a seven-point check before you press Schedule. Get the template (Members)
One number
40%: the share of Apertus’s training data that is not in English, against roughly 10% for competing models, according to swissinfo.ch’s one-year review of the Swiss model (swissinfo.ch, 2 September 2026). One reason to test it on French and Italian posts, not only German ones.
That’s it for this week. Hit reply and tell me: which channel brings you actual customers, and which one do you post on out of guilt? I’ll share the answers (anonymously) in a future issue.
Adam
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