Anthropic prompt caching pricing: write, read and TTL math
Anthropic prices prompt caching with three numbers: a 1.25x or 2x premium on cache writes depending on TTL, a 0.1x rate on cache reads, and the base input rate for everything after the last breakpoint. This deep-dive verifies every figure against the current official docs and covers per-model minimums, break-even math, batch stacking and how Claude on Azure converts it all into CCUs.
GPT-5.6 Sol vs Terra vs Luna: an Azure routing playbook
OpenAI released the GPT-5.6 series on 9 July 2026 in three tiers: Sol for hard reasoning and long autonomous runs, Terra for everyday work and Luna for speed and cost, with same-day availability in Microsoft Foundry and a new preferred-model role in Microsoft 365 Copilot. This playbook maps Azure workloads to the right tier, works the token math in SEK and flags the Copilot subprocessor setting Swedish admins must review before 24 July.