As of: 2026-10-10 14:45 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.
Canonical page: https://postcutoff.com/m/microsoft-decision-1/

# Microsoft-Decision-1

Microsoft, Microsoft-Decision family. Status: current. Type: language model. Released: 2026-10-09. Training cutoff: not published.

## How to call it

| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Microsoft Foundry | `Microsoft-Decision-1` |  | https://commandline.microsoft.com/microsoft-decision-1-model-foundry/ |

## Pricing

- Input: $0.042 per 1M tokens
- Output: $0 per 1M tokens
- Unit as published: per 1M tokens (USD); output tokens free
- Source: https://commandline.microsoft.com/microsoft-decision-1-model-foundry/
- Last checked: 2026-10-10

## Specs

- Input: text
- Output: text
- Context window: not published
- Max output: not published
- Open weights: no
- Licence: proprietary

## What it has not seen

- No published training cutoff. Counted from its release (2026-10-09): at least 2 AI events since (0 major, 0 historic), as of 2026-10-10.
- Everything since September 2026: https://postcutoff.com/since/2026-09/

## What stands out

- Fast decision scoring: A post-trained Qwen3.5-9B that scores choices rather than chatting; Microsoft claims the highest accuracy in a 36-benchmark comparison (~150K questions) and p50 latency 2.5x faster than H2O-Lightning-4B v1.1 and 35x faster than GPT-6 Sol. Source: https://commandline.microsoft.com/microsoft-decision-1-model-foundry/

## Notes

Microsoft says it is also on OpenRouter, but the OpenRouter page returned 404 and the model was absent from OpenRouter's models API on 2026-10-10. Microsoft plans to rebase it on other models, including Microsoft AI and OpenAI models. No weights release mentioned. Context window not stated.

Competes with Cloudflare's Clef decision models, TypeSafe's Jev and Perplexity's decider models, a new "decision model" category in autumn 2026.

Model page: https://postcutoff.com/m/microsoft-decision-1/