Blog

Technical depth on AI, Azure, Next.js, and the engineering decisions behind them.

25 posts

Sonnet 5.5 vs GPT-6.1 Sol on Azure: the $2/$10 cost math

Claude Sonnet 5.5 and GPT-6.1 Sol reached Microsoft Foundry a day apart at the same $2/$10 list price, yet a cache-heavy 60-turn agent session costs $3.45 on Sonnet 5.5 and $2.55 on GPT-6.1 Sol, or $3.06 in the EU Data Zone that Claude still lacks. Above 272K input tokens the order flips, because GPT-6.1 Sol doubles its input rate while Sonnet 5.5 keeps flat pricing to 1M tokens and can run with no up-front reasoning.

September 30, 2026182 viewsAzure & Cloud

Claude Opus 5.5 in Foundry: the Opus 5 migration cost math

Claude Opus 5.5 is GA in Microsoft Foundry at $4/$20 per million tokens with cache reads at $0.20, which cuts a cache-heavy 60-turn agent session from $8.63 on Opus 5 to $5.10 and brings it within 1.5x of Sonnet 5. The saving can reverse on uncached endpoints that ran Opus 5 with thinking disabled, because thinking is now always on, the default effort dropped to medium, and Foundry still offers no EU data zone, batch pricing or fast mode.

September 24, 2026371 viewsAzure & Cloud

Azure's 30 September retirements: what stops working

More than ten Azure items retire on 30 September 2026, and the ones that fail silently are more dangerous than the ones that fail loudly: URL ping tests are deleted from your resources and the ContainerLog table stops receiving data, taking alert rules down with them. A triage guide with Resource Graph queries, Sweden Central cost math for standard web tests and Basic Logs, and a checklist for the Functions v3, Service Bus SBMP and 1 October AI service deadlines.

September 19, 2026607 viewsAzure & Cloud

AWS lost Bahrain for good: your Azure region-loss plan

AWS confirmed on 15 September 2026 that data hosted only in its Bahrain region, and in one UAE Availability Zone, is permanently lost after Iranian strikes damaged multiple zones, proving that multi-AZ design protects availability but not against losing a whole region. For Azure teams in Sweden and the EU, the fix is a classified inventory, GZRS and geo-redundant backups for critical data, and early access to restricted pair regions such as Sweden South.

September 17, 2026266 viewsAzure & Cloud

GPT-6 Astra migration on Azure: the GPT-5.6 Sol checklist

GPT-5.6 Sol retires on Foundry in January 2028, so moving to GPT-6 Astra is a choice rather than a deadline, and it touches more than a deployment name: tool calls must move to the Responses API, effort none and temperature disappear, and every line on the price sheet costs 2 to 2.5 times more. A phase-by-phase checklist built on Microsoft's migration process, OpenAI's model guidance and the Learn pages, with the Swedish residency caveat that keeps part of your traffic on Sol.

September 11, 2026426 viewsAzure & Cloud

GPT-6 Astra in Foundry: the price, the gate and the EU gap

GPT-6 Astra arrived in Microsoft Foundry on 3 September 2026 at $10/$50 per million tokens, the same list price as Claude Fable 5.1 and 2.5x GPT-5.6 Sol on promo, behind a Limited Access gate and with no EU Data Zone. The cost math on document jobs and 60-turn agent loops, the 272K long-context cliff, what the Critical cyber rating means for refusals, and how a Swedish team should handle residency until the EU zone lands at its new 20% premium.

September 4, 20265,254 viewsAzure & Cloud

Claude Fable 5.1 in Foundry: cache math and the EU caveats

Claude Fable 5.1 keeps Fable 5's $10/$50 pricing but cuts cache reads to $0.25 per million tokens, which turns a 60-turn agent session from $17.25 into $10.50 and shrinks the premium over Opus 5 from 2x to about 22%. On Microsoft Foundry it ships Anthropic-hosted only, with no EU data zone, no Batches API, a zero default quota on pay-as-you-go, mandatory 30-day retention until Enterprise Frontier Safeguards arrive, and three breaking changes for teams migrating from Fable 5.

September 3, 2026963 viewsAzure & Cloud

Foundry EU Data Zone premium doubles: the Swedish cost math

From 1 September 2026 Microsoft Foundry charges 20 percent over Global for EU Data Zone deployments, up from 10 percent, and 30 percent for Sweden Central regional, while Global pricing stays flat and West Europe regional hits 50 percent. Pay-as-you-go customers only pay the new rate on models launched from today, PTU customers pay immediately, and GPT-5.6 is not yet on regional Standard in Sweden, so here is the cost math and a six-step checklist.

September 1, 2026697 viewsAzure & Cloud

Cohere Parse v5 in Foundry: document parsing cost math

Cohere Parse v5 landed in Microsoft Foundry on 27 August 2026 at $1.50 per 1,000 pages, the same price as Document Intelligence Read and under a third of Content Understanding's layout meter. We price all four Azure document parsers in Sweden Central at 100k, 1M and 10M pages a month, then weigh the saving against Parse's missing confidence scores, absent Swedish language support and preview-only status.

August 31, 2026449 viewsAzure & Cloud

Azure Assistants API retired: migrating to Foundry Agents

The Azure OpenAI Assistants API reached its retirement date on 26 August 2026, and the classic Foundry Agent Service it underpins retires 31 March 2027. A step-by-step migration guide to the new Foundry Agent Service on the Responses API: threads become conversations, runs become responses, assistants become versioned agents, and Microsoft's migration tool rewrites code but not stored state.

August 28, 2026639 viewsAzure & Cloud

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.

August 3, 20261,087 viewsAzure & Cloud

Sovereign AI on Azure: what the Microsoft-Mistral deal means

Microsoft and Mistral announced an expanded partnership on 21 July 2026: Mistral Medium 3.5 and OCR 4 arrive in Microsoft Foundry and Copilot Studio, deployable from Azure cloud to customer-controlled and fully air-gapped Azure Local environments, backed by a multibillion-dollar European GPU buildout. We compare the three deployment modes and what each one solves for Swedish public sector and regulated industries.

July 24, 2026379 viewsAzure & Cloud