The Keskin Report: Models Die, But Your Product Shouldn't

Happy Friday. I spent Wednesday debugging a prompt that worked perfectly on GPT-4 and turned into gibberish on Claude. Then I read the new ArXiv paper on LLM migration frameworks and realized I'm not alone — we're all just one vendor deprecation notice away from panic.

**1. The Model Graveyard Finally Gets a Map**

Someone at ArXiv dropped a paper this week titled exactly what every AI product lead has been thinking: what happens when your production LLM reaches end-of-life? The framework they…