Source: raw/x-account-claudeai-2071653958905467027.md (first-party @claudeai announcement, 2026-06-29, via x_search provider: xai-oauth) + raw/reddit-1uizule.md (r/ClaudeAI ClaudeOfficial post, score 135). Blog: https://claude.com/blog/claude-in-microsoft-foundry.
Week 27 opens with a platform-availability headline rather than a Claude Code point release: Claude reached general availability in Microsoft Foundry. No new Claude Code CLI versions had shipped in this window at time of writing (the last release was v2.1.195 in W26); CLI changes for the week will be appended here as they land.
Platform availability
Claude generally available in Microsoft Foundry (June 29)
Claude is now GA in Microsoft Foundry, hosted on Azure infrastructure and operated by Anthropic. This is the Azure-side counterpart to the Claude Platform on AWS GA tracked in W20.
- Models available: Claude Opus 4.8 and Claude Haiku 4.5. (Notably not Fable 5 / Sonnet — consistent with the Fable 5 availability constraints still in effect.)
- Build in-environment: Azure customers can build production applications and agents with Claude entirely within their existing Azure environment.
- Enterprise integration: works with the authentication, billing, and governance an org already has in place; for eligible customers, usage draws down the Microsoft Azure Consumption Commitment (MACC).
- Capabilities at launch: prompt caching and extended thinking are supported today, with more on the way. (Prompt-caching-on-Foundry had a per-request attestation-token bug fixed in CC v2.1.181 — see W26.)
Key Takeaways
- Claude is now GA on all three major clouds’ agent platforms — AWS (Bedrock / Claude Platform, W20), and now Azure via Microsoft Foundry — lowering the integration barrier for enterprises already committed to Azure (MACC drawdown removes a separate-procurement step).
- Opus 4.8 + Haiku 4.5 only at launch. The two-model lineup (no Fable 5/Sonnet) mirrors the post-shutdown availability picture; treat Foundry as an Opus/Haiku surface for now.
- Prompt caching + extended thinking work on Foundry today — the two capabilities most relevant to cost and reasoning-heavy agent workloads are in from day one (see token-optimization for the auth-type-dependent caching mechanics).
Related
- Week 26 Release Digest — the prior week’s Claude Code releases (v2.1.174–195), incl. the Foundry prompt-caching fix.
- Week 20 Release Digest — the Claude Platform on AWS GA, the precedent for cloud-platform GAs landing in the weekly digest.
- Claude Opus 4.8 — one of the two models GA on Foundry.
- Mythos 5 Federal Shutdown — context for why Fable 5 is absent from the Foundry lineup.
- Claude Code Token Optimization — prompt-caching mechanics that now apply on the Foundry surface.