As of: 2026-10-12 22:30 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.
Canonical page: https://postcutoff.com/p/x-msdev-2108637164301119691/

# Microsoft Developer: 'Introducing Microsoft-Decision-1'

Microsoft Developer (@msdev), X, 2026-10-09.
Source: https://x.com/msdev/status/2108637164301119691

## Why it matters

Official launch thread for Microsoft-Decision-1 (about 102k views), with the 36-benchmark claim and the plan for versions built on Microsoft AI and OpenAI models.

## Summary

Posted Oct 9, 2026 (19:14 UTC). 'Our model for fast decision-making that delivers top performance in latency and quality on structured decision tasks to outperform both LLMs and other decision models.' Thread replies say the model 'achieved the highest accuracy in our 36-benchmark comparison, spanning nearly 150,000 questions across benchmarks kept blind from training', show a classification comparison with GPT-6 Sol, and add: 'This is our first release in this new class of decision models, and we will continue to release updates including versions built on @MicrosoftAI and OpenAI models in the future', available in Microsoft Foundry 'and soon through OpenRouter'.

_Metrics read 2026-10-12 via api.fxtwitter.com: 102,017 views, 1,526 likes, 234 reposts (first post of the thread)._

## Archived text

> Introducing Microsoft-Decision-1
> 
> Our model for fast decision-making that delivers top performance in latency and quality on structured decision tasks to outperform both LLMs and other decision models.
> https://commandline.microsoft.com/microsoft-decision-1-model-foundry/

Archived 2026-10-12 via fxtwitter (unofficial).
Counts: 102,028 views, 1,526 likes, 234 reposts, 46 replies (at fetch time)

## Cited in

- 2026-10-09: [Microsoft-Decision-1 decision model](https://postcutoff.com/e/2026-10-09-microsoft-decision-1/)