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Microsoft Foundry
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microsoft-foundry-c3f33259·6 events·first seen Aliases: Microsoft Foundry
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Claude Fable 5 and Mythos 5 reinstated after U.S. export control suspension and safety guardrail negotiations
Anthropic's Claude Fable 5 and Mythos 5 were suspended globally on June 12 following a U.S. Department of Commerce export control directive triggered by Amazon researchers demonstrating cyberattack capability extraction from Fable 5. After three weeks of negotiations, Anthropic implemented additional cybersecurity guardrails and restored access on July 1, with some users reporting degraded performance and over-censorship of legitimate queries. The episode marks the first time a government intervention led to the suspension of general public access to a frontier AI model, and sets a precedent for government review of top-tier model releases. OpenAI's GPT-5.6 family launches were also preceded by a government-mandated capability preview, suggesting an emerging pattern of regulatory scrutiny before wide deployment.
Microsoft reveals MAI-Thinking-1, a from-scratch reasoning model with MoE architecture
Microsoft introduced MAI-Thinking-1, its first reasoning language model built without distillation from third-party models, comparable in size to Claude Sonnet 4.6. The model uses a mixture-of-experts architecture (1T total / 35B active parameters), was pretrained on 30 trillion tokens of primarily licensed human-generated data, and trained via reinforcement learning across specialist models for STEM, coding, and safety. It scored 97.0% on AIME 2025, placing third behind Claude Opus 4.6 and ahead of DeepSeek V3.2, and is available in private preview via Microsoft Foundry. The release marks a strategic shift as Microsoft moves to reduce dependence on OpenAI models following a renegotiated partnership in April 2026.
Data Points: NeurIPS-China Standoff, Anthropic Emotion Vectors, Gemma 4, Cursor 3, Microsoft MAI Models
This edition of The Batch covers five significant AI developments: NeurIPS reversed a sanctions-related submission policy after China's largest tech federation announced a boycott; Anthropic's interpretability team identified 171 emotion-related representations in Claude Sonnet 4.5 that causally influence model behavior including unsafe actions; Google released Gemma 4, a family of Apache 2.0-licensed open-weights models up to 31B parameters with strong benchmark performance; Cursor released version 3 with a redesigned multi-agent interface; and Microsoft announced three specialized MAI models for transcription, voice synthesis, and image generation. The NeurIPS incident highlights growing friction in international AI research access, while the Anthropic findings have direct implications for AI safety and interpretability research.
Claude Sonnet 4.5, Haiku 4.5, and Opus 4.1 Now Available in Microsoft Foundry and Microsoft 365 Copilot
Anthropic and Microsoft are expanding their partnership to make Claude Sonnet 4.5, Haiku 4.5, and Opus 4.1 available in public preview on Microsoft Foundry, enabling Azure customers to build production applications and enterprise agents using existing Azure agreements and billing. Claude is also being integrated into Microsoft 365 Copilot's Agent Mode in Excel, allowing users to generate formulas, analyze data, and iterate on spreadsheet solutions. The Foundry integration supports serverless deployment with Python, TypeScript, and C# SDKs, and includes capabilities such as code execution, web search, citations, vision, and prompt caching. This partnership reduces procurement friction for enterprises already invested in the Microsoft ecosystem.
Microsoft, NVIDIA, and Anthropic Announce Major Strategic Partnerships with $15B Investment and $30B Azure Compute Commitment
Anthropic has announced simultaneous strategic partnerships with Microsoft and NVIDIA, committing to purchase $30 billion of Azure compute capacity and up to one gigawatt of compute with NVIDIA Grace Blackwell and Vera Rubin systems. NVIDIA and Microsoft are investing up to $10 billion and $5 billion respectively in Anthropic, while Claude models (Sonnet 4.5, Opus 4.1, Haiku 4.5) will be available on Microsoft Foundry and across the Copilot product family. Anthropic and NVIDIA are also establishing a deep technology partnership to co-optimize model performance and future NVIDIA architectures for Anthropic workloads. Amazon remains Anthropic's primary cloud and training partner.
Anthropic Releases Claude Opus 4.7 with Enhanced Coding, Vision, and Cyber Safeguards
Anthropic has released Claude Opus 4.7, a general-availability model positioned as a meaningful improvement over Opus 4.6 in advanced software engineering, long-horizon agentic tasks, and vision capabilities including higher image resolution. The model is notably the first to receive new cybersecurity safeguards developed in response to Project Glasswing, with automatic detection and blocking of prohibited cyber uses and a new Cyber Verification Program for legitimate security professionals. Opus 4.7 is available across Claude products, API, Amazon Bedrock, Google Cloud Vertex AI, and Microsoft Foundry at the same pricing as Opus 4.6 ($5/$25 per million input/output tokens). The release is explicitly positioned below Claude Mythos Preview in overall capability, serving as a testbed for safety mechanisms before broader deployment of Mythos-class models.