Posts tagged with "Cost optimisation"

Between 15 and 30 November 2026 Microsoft Foundry retires codex-mini, Claude Haiku 4.5, seven o-series models, Llama 4 Maverick and Claude Opus and Sonnet 4.5, and the named o-series replacement rejects tool calls on Chat Completions unless reasoning is switched off. Here is the inventory loop, the cost math from Azure's own price list showing the auto-upgrade roughly doubles an o3 or o4-mini bill, the Haiku 5.5 parameter changes, and a ten-day plan with the EU Data Zone consequences.