Three Days with Claude Fable 5 — and Why Opus Stays My Daily Driver
Fable 5 fixed a bug in one shot that Opus failed at twice. I'm still not switching. My honest impressions from the trenches after three days.
Martin Rau ·
KI-Modelle
Konkrete Sprachmodelle und Modellfamilien — wer entwickelt sie, wofür sind sie geeignet.
Headless without an API bill — how do you reach the best AI models for automation in 2026?
Provider comparison mid-2026: who has a headless mode, whose subscription still covers it — and why BYOK is the most stable foundation.
Redaktion ·
98.64 % uptime? It felt like I was blocked 44 % of the time.
Anthropic's status board shows 98.64 % uptime. The per-day stripes tell a different story — and it's the one that matters for your work.
Martin Rau ·
Usage-based instead of flat-rate: The AI cost turn was predictable — and here is how to absorb it
AI providers are pushing flat rates toward metered billing. Why it had to happen, what it costs and three levers that soften the shift.
Martin Rau ·
Prompt Caching in practice: from €280 to €47 per month
Real numbers from a customer setup with Claude Sonnet. What prompt caching delivers, when it pays off — and where the pitfalls are.
Redaktion ·
Claude Code: How to enable Fast Mode for Opus 4.6 — and what it costs
Fast Mode for Opus 4.6 is now extra-usage only. Here's how to enable it — and what it really costs you.
Redaktion ·
Opus 4.7 hasn't reached the quality level of 4.6 yet — our recommendations
What we see after several weeks on Opus 4.7 in practice — token appetite, overachieving, and concrete levers to push back.
Redaktion ·