Small update. Big engine.
Today (Monday, July 13, 2026), we replaced the language model behind Zappa. From GPT-4.1 to GPT-5.6. One generation ahead. Without you having to do anything.
What you’ll notice
Zappa understands you better.
GPT-5.6 is stronger in language and nuance. That means: sharper prompts from the same input. Less noise. More precision in what you get back.
Your workflow stays exactly the same. Log in, work, done.
Under the hood
The entire technical foundation of Zappa was included in this update. All components now run on the latest versions.
Tested, built, and deployed live. Everything works.
Live as of today
The changes have been live since today, Monday, July 13, at zappa.pb.nl.
You’ll probably notice very little. Except that the results feel just a bit better. That is exactly the intention.
Do you notice anything?
If anything changes, or something doesn’t come back the way you’re used to, please get in touch right away via pb.nl.
And if your experience is positive — we’d love to hear that too.
— Peter | PB.nl email me: pb@pb.nl
TECH STATS: And the rest came along too
next: 16.2.4 → 16.2.10
react: 19.2.4 → 19.2.7
sharp: 0.34.5 → 0.35.3
@google/genai: 2.7.0 → 2.11.0
@anthropic-ai/sdk: 0.88.0 → 0.111.0
lucide-react: 0.469 → 1.24
openai: 4.104 → 6.46
Plus all other dependencies updated to latest.
One thing broke: the Chrome icon no longer existed in lucide-react 1.x. Replaced with Globe. Done.