Applied AI: Choosing a Model

Information in this post reflects publicly available sources as of November 1, 2026. A team picks the model at the top of a popular leaderboard for its invoice extraction service. On their invoices, it does slightly worse than the mid-tier model it replaced, at three times the price. Six months later, after they have finally tuned their prompts for it, the provider announces its retirement with 60 days' notice. None of this is bad luck. It is … Read More

Applied AI: Reasoning Models

Information in this post reflects publicly available sources as of October 21, 2026. A team switches its support-ticket tagger to a reasoning model after it tops their internal benchmark. A week later, tagging takes nine seconds instead of one, the bill has quadrupled, and the tags are no more accurate than before. In the same week, an engineer hands that model a date-range bug that the fast model had confidently misdiagnosed three times. It find… Read More