The Kryotta blog
Guides and comparisons on working with every AI model — Claude, Gemini, Llama, Mistral, DeepSeek and more — plus what we're building.
I used Claude vs Gemini to write 95 Allegro return emails: which one per reason
I tested Claude and Gemini on 95 real Allegro return emails across Polish, Czech, and Slovak markets. Here's which AI model won for each return reason—and why it matters for marketplace sellers.
I used 3 AI models to write 95 Klarna late-payment reminder emails: which tone got paid
I tested three AI models writing 95 overdue payment reminders in different tones. The results showed tone mattered far more than which model I used—and the most effective approach surprised me.
I used 4 AI models to write 160 SEPA mandate rejection emails: which one per bank
A Berlin bookkeeper tested four AI models on 160 failed SEPA mandate emails and picked different ones for each bank type. Here's which model worked best for Sparkasse, N26, Revolut, and others.
I used Claude vs Gemini to write 100 Klarna dispute responses: which one per claim
I tested Claude and Gemini on 103 real Klarna disputes from my outdoor gear shop. Claude won overall, but each model dominated different claim types—here's which one to use for what.
I used AI in 6 EU industries for 30 days: what it actually does in e-commerce vs healthcare vs restaurants
A Rotterdam consultant tested AI across healthcare, e-commerce, and restaurants for 30 days. Here's what actually worked—and what didn't.
I used Auto routing for 190 Zalando and Bol return emails: which model it picked per query
I processed 190 return emails across Zalando and Bol using AI auto routing. Here's which model the system picked for each query type, and whether it actually saved time.
I used 3 reasoning models to debug 35 SEPA direct debit failures: which one per error type
I tested o1, Gemini 2.0 Flash Thinking, and DeepSeek R1 on 35 real SEPA direct debit failures. Here's which model solved each error type fastest and cheapest.
€19 for ChatGPT Plus or €12 for six AI models: the real cost breakdown for EU stores
ChatGPT Plus costs €34–€38 monthly for EU stores once you add VAT, API charges, and payment fees. Kryotta's €12 plan includes six AI models with no hidden costs.
I used 4 AI models to write 100 GDPR data requests in one week: which one per case
I cleared a 103-request GDPR backlog in one week using Claude, Gemini, DeepSeek, and GPT-OSS. Here's which model handled each request type fastest and why it cost only €8.30.
I used Auto routing for 180 Allegro and Bol return emails: which model it picked per query
I processed 180 return emails from Allegro and Bol.com using AI auto routing. Here's which model it picked for each type of request and whether those choices actually saved time.
I used 3 AI models to review 45 pull requests: which one for bugs, style and tests
I split code review across three AI models—Claude for logic bugs, Gemini for style, DeepSeek for tests—and reviewed 45 PRs to see which one actually catches what matters.
I made 35 product shots for Zalando and Bol with AI: which prompts passed review
I generated 35 AI product shots for two European marketplaces and tracked which prompts passed review. Here's the exact formula: white backgrounds, material specifics, and lighting language that actually works.