Microsoft announces Copilot handoffs of some coding tasks to local MAI-Code-1.1-Flash

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Rohan Paul· @rohanpaul_ai · X· 2026-10-08 03:21 · Original publication time AI score60

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Microsoft announced that Copilot can hand some coding tasks to MAI-Code-1.1-Flash running on a PC, with no inference charge for local model calls. The model retains a 256K-token context window; Microsoft says its quantized version scores the same as full precision on two coding benchmarks. Microsoft also announced that its MXC agent sandbox is generally available on Windows 11.

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Microsoft just announced that Copilot will hand routine coding from Anthropic's Claude Haiku 4.5 to Microsoft's MAI-Code-1.1-Flash (a 137B total and 6.8B active param model) running on Nvidia-powered PCs

A model router will keep th routine work on the machine and this local model calls carry no inference charge.

The on-device MAI-Code-1.1-Flash uses 3-bit quantization yet keeps its 256K-token context window, and Microsoft says it scores the same as full precision on SWE-Bench Verified and Terminal-Bench 2.1.

Microsoft's hardware for the shift is the Surface Laptop Ultra from $2,599 and the Surface RTX Spark Dev Box from $5,999

Both run on Nvidia's RTX Spark, an Arm-based chip with a Blackwell GPU and up to 128GB of memory shared by processor and graphics.

Also, Microsoft made its agent sandbox, Microsoft Execution Containers (MXC), generally available on Windows 11. Companies can now set which files and network locations an agent may use, and Windows blocks everything else while the agent runs, with isolation levels ranging from separate processes and sessions up to virtual machines and cloud PCs.

QuoteSatya Nadella@satyanadella

Today marks a new chapter for Windows, as we bring unmetered intelligence to every desk and every home, and make every PC a place where agents can work securely on your behalf. Some highlights of what we announced: • MAI-Code-1.1 Flash: 137B parameter coding model w/ 256K context window, which is now optimized to run on your PC! • GitHub Copilot now hands off work to local models like MAI-Code-1.1 Flash, helping projects cost a lot less without sacrificing quality. • With Hybrid Intelligence, Copilot can now take action directly on the PC and keep sensitive work on your device. • And with Code in Copilot, you can essentially build any software you need on your desktop, without any cloud token spend, and it’s just super at it. You’re no longer limited to what’s in an app store! Your PC becomes an infinite software factory. • Security is foundational to all this, which is why we are also bringing together Windows and Agent 365 so agents can work within secure boundaries on-device, including MXC a local sandbox for agent execution. Windows becomes your secure agent box! • All this comes to life on a new generation of devices, like Surface Laptop Ultra, powered by NVIDIA RTX Spark. Can’t wait to see what you build with all this.

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