LLM cost planning autumn 2026: Sonnet 5 stays at $2/$10
Anthropic has cancelled the Claude Sonnet 5 price increase scheduled for 1 September 2026, making the introductory $2 input / $10 output per million tokens the permanent standard price. For teams running Claude on Azure through Microsoft Foundry, that removes a planned 50% jump from autumn budgets and reshapes the mid-tier price comparison against GPT-5.6 Terra and Gemini 3.1 Pro.
Unlimited free ChatGPT vs governed enterprise AI on Azure
OpenAI removed limits on text chats for free ChatGPT users on 6 August 2026 and made GPT-5.6 Luna the default, cutting factual errors by roughly 62 percent versus the prior model. For Swedish and EU enterprises on Azure, the free consumer tool employees already use just became unlimited and much stronger, so shadow AI pressure rises and the case for a governed answer built on Copilot Chat, paid Copilot seats and Azure OpenAI becomes urgent.
Azure OpenAI cost check: GPT-5.6 price cuts and PTU math
OpenAI cut GPT-5.6 Luna prices by 80 percent and Terra by 20 percent on 30 July 2026, and Microsoft confirmed the same decreases reach Azure OpenAI Global Standard deployments from 1 August. For Swedish and EU teams running these models on Azure, the cuts move the break-even point for PTU reservations, model routing and residency premiums, so the autumn budget math deserves a fresh pass before any new one-year commitments.
Claude Opus 5 for long-running agents: the cost math
Claude Opus 5 launched on 24 July 2026 at $5/$25 per million tokens with a 1M context window and day-one availability in Microsoft Foundry. For long-running agents the per-token price is the wrong unit: we work through cost per completed task against Sonnet 5 and GPT-5.6 Sol, and flag the EU data-residency caveat Swedish Azure teams need to check first.
Running GPT-5.6 the enterprise way on Microsoft Foundry
GPT-5.6 (Sol, Terra, Luna) went GA in Microsoft Foundry on 9 July 2026, day-and-date with OpenAI, alongside a new Asia-Pacific Data Zone and a hosted agents runtime with VNet integration. A practical guide for Swedish and EU Azure teams: choosing between the three models, picking Global Standard versus EU Data Zone versus PTUs, worked cost math on the launch prices, and a two-week adoption checklist.
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.