llms.txt
+4 −1
https://llmcutover.com/llms.txt
− ## Shutdowns (dates from provider pages, checked 2026-11-03; not affiliated with OpenAI or Anthropic)+ ## Shutdowns (dates from provider pages, checked 2026-11-09; not affiliated with OpenAI or Anthropic)+ - [Migrate off Claude Sonnet 4.5 before Nov 30](https://llmcutover.com/guides/migrate-off-claude-sonnet-4-5/): find call sites, test claude-sonnet-5-5, switch before retirement+ - [GPT-4o / GPT-4.1 retirement checklist](https://llmcutover.com/guides/gpt-4o-gpt-4-1-retirement-checklist/): inventory, fine-tunes, test gpt-6-luna before Jan 14, 2027+ - [Test a cheaper model on yes/no classification prompts](https://llmcutover.com/guides/test-cheaper-model-yes-no-classification/): gather labels, measure agreement, route by confidence