As of: 2026-10-12 07:22 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-airesearch12-2109013371626602782/

# JevBench: Microsoft-Decision-1 ranks #6 among API decision models, #12 overall

Florian S (@airesearch12), X, 2026-10-10.
Source: https://x.com/airesearch12/status/2109013371626602782

## Why it matters

Independent (community) benchmark result that contrasts with Microsoft's own 'top performance' claim.

## Summary

The author of the community benchmark JevBench (benchmarkheaven.com) reports that Microsoft-Decision-1 'scores #6 in its peer group of API provided decision models' and '#12 on the composite score' in a mixed leaderboard of open and API models. Jev is #4 and Sage #1 among API models. It is strong in recruiting, risk assessment, gaming, advertising, science and moderation, and 'the strongest API provided model in the top 10 in mixed-language tasks'. Unofficial benchmark.

_Metrics read 2026-10-12 via api.fxtwitter.com: 15,992 views, 167 likes._

## Archived text

> Official JevBench results:
> 
> Microsoft-Decision-1 scores #6 in its peer group of API provided decision models.
> 
> Compared with Jev it performs strong on many typical use cases, most notably on Recruiting, Risk assessment, Gaming, Advertising, Science and Moderation.
> 
> It's also the strongest API provided model in the top 10 in mixed-language tasks.
> 
> In our headline ranking for API offered models Jev superseeds it on #4 and Sage leads on #1.
> 
> Please be aware that JevBench seperates the leaderboards of 
> - API offerered models such as Microsoft-Decision-1 
> (found here: https://benchmarkheaven.com/jev-models/api) and 
> - open weights models 
> (found here: https://benchmarkheaven.com/jev-models), 
> because speed and cost can only be scored in a fair way within these seperate peer groups.
> 
> In a mixed leaderboard of open and API hosted models it lands #12 on the composite score.
> 
> It's a good model, and certainly will find its customer base, given Microsofts strong position in enterprise compliant cloud offerings.
> 
> Congrats @Microsoft!
> 
> > Quoting @satyanadella: Introducing Microsoft-Decision-1, our new model for fast decision-making.
> > 
> > It delivers top performance on structured decision tasks, outperforming both LLMs and other decision models in latency and quality.
> > 
> > We’re already testing it across Microsoft for everything from incident response and quality control to scientific discovery.

Archived 2026-10-12 via fxtwitter (unofficial).
Counts: 16,002 views, 167 likes, 19 reposts, 14 replies (at fetch time)
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## Cited in

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