Apr 8, 2026
Meta Muse Spark ranks 3 on the Vals Index
We’ve completed our evaluation of Muse Spark — Meta’s first frontier release in a year.
It debuts at #3 on the Vals Index (65.66%), re-entering the top tier alongside Claude Opus 4.6 (Thinking) and GPT 5.4 (xhigh).
Key takeaways:
- #1 on TaxEval (77.68%), dethroning Claude Sonnet 4.6. It also takes #2/41 on Finance Agent (v1.1) (60.60%), showing standout strength in finance.
- Broad performance across hard evals — top placements on AIME, GPQA Diamond, and MedScribe — not isolated to a single domain.
- Obtains third place on Terminal-Bench 2.0, scoring 59.55%.
Evaluations were run via the Meta API. Congrats to the team at Meta on a standout release.