https://evalshift.dev/blog Field notes on migrating LLM models safely: golden suites, paired evaluation, regression gates in CI, and evaluator reliability. en https://evalshift.dev/blog/test-llm-model-migration-before-you-ship https://evalshift.dev/blog/test-llm-model-migration-before-you-ship Fri, 31 Jul 2026 00:00:00 GMT A repeatable method for proving a model swap is safe: freeze a golden suite, run both models paired, and read the diff before your users do. https://evalshift.dev/blog/llm-regression-testing-in-ci https://evalshift.dev/blog/llm-regression-testing-in-ci Fri, 24 Jul 2026 00:00:00 GMT Wire a golden suite into GitHub Actions so every pull request gets a paired eval run, a base-branch diff, and a check that fails on real regressions. https://evalshift.dev/blog/when-to-trust-an-llm-judge https://evalshift.dev/blog/when-to-trust-an-llm-judge Fri, 17 Jul 2026 00:00:00 GMT LLM judges are useful and easy to fool. Where pairwise judging holds up, where it breaks, and how to stop a judge from silently deciding your migration.