Microsoft Aion 1.0 Instruct and Aion 1.0 Plan models!

Reddit r/LocalLLaMA Models
microsoft aion on-device small-language-model reasoning-model open-weights windows

Summary

Microsoft announced two new on-device AI models at Build 2026: Aion 1.0 Instruct, an open-weights small language model, and Aion 1.0 Plan, a 14B parameter reasoning and tool-calling model for local agentic workflows.

Microsoft [announced](https://blogs.windows.com/windowsdeveloper/2026/06/02/build-2026-furthering-windows-as-the-trusted-platform-for-development/) 2 new on-device models at Microsoft Build 2026. > Aion 1.0 Instruct: efficiency at scale. Aion 1.0 Instruct is our next-generation small language model, smaller, faster and more efficient than our current Windows OS SLM. Designed from the ground up for on-device workloads, Aion 1.0 Instruct powers everyday text intelligence (summarization, rewrite, intents, accessibility) and extends beyond Windows APIs with integration into the Edge browser and availability as open weights. Aion 1.0 Instruct seems to be a 1:1 competitor to Apple's AFM-3B on -device LLM, and will be open-weights!! > Aion 1.0 Plan: local agentic reasoning. Aion 1.0 Plan is a 14-billion parameter reasoning and tool-calling model with 32K context length that ships in-box as part of Windows on capable devices. It enables applications to reason over user intent, invoke tools, manage files and orchestrate sub-agents, bringing fully agentic workflows onto the device. 14B...I wonder if this just Phi-4 with RLVR tool use training? Or is it a new model?
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