As of: 2026-10-13 07:38 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-artificialanlys-2109697091685793816/

# Artificial Analysis thread (reply 3): knowledge 'a relative weakness' for Muse Wonder, with low hallucination rates

Artificial Analysis (@ArtificialAnlys), X, 2026-10-12.
Source: https://x.com/ArtificialAnlys/status/2109697091685793816

## Why it matters

Independent knowledge and hallucination results for both Muse Wonder models.

## Summary

Posted Oct 12, 2026 (17:25 UTC). Third reply in Artificial Analysis' thread (root: x-ArtificialAnlys-2109697083519447118). 'Knowledge remains a relative weakness for both models, but this is mitigated by very low hallucination rates.' On AA-Omniscience, Muse Wonder Full (max) scores 30 and Muse Wonder (max) 25, below Claude Opus 5.5 (46), GPT-6 Astra (43), Gemini 4 Argon (42) and Claude Sonnet 5.5 (32). Wonder Full lowered its hallucination rate from 33% to 23%, the second lowest of any model scoring 45 or more on the Intelligence Index, behind Gemini 4 Argon (high, 15%); Muse Wonder (max) is third at 27%.

_Metrics as of 2026-10-13 via api.fxtwitter.com: 5,134 views, 42 likes, 1 reposts._

## Archived text

> Knowledge remains a relative weakness for both models, but this is mitigated by very low hallucination rates. On AA-Omniscience, Muse Wonder Full (max) scores 30 and Muse Wonder (max) scores 25, level with Muse Spark 1.3 (max), below e.g. Claude Opus 5.5 (46), GPT-6 Astra (43), Gemini 4 Argon (42), and Claude Sonnet 5.5 (32)
> 
> Muse Wonder Full (max)'s 5-point gain comes from lowering its hallucination rate (33% to 23%), which places it among the least-hallucinating models tested: it has the second-lowest hallucination rate of any model scoring 45 or more on the Intelligence Index, behind only Gemini 4 Argon (high, 15%). Muse Wonder (max) is third at 27%

Archived 2026-10-13 via fxtwitter (unofficial).
Counts: 5,164 views, 42 likes, 1 repost, 1 reply (at fetch time)
Media: https://pbs.twimg.com/media/HUclEFObMAA_eGn.jpg?name=orig

## Cited in

- 2026-10-12: [Meta releases Muse Wonder and Muse Wonder Full, its first frontier-class models](https://postcutoff.com/e/2026-10-12-meta-muse-wonder/)