Harvey LAB-AA v1.1
Muse Wonder Full 13.1% leads since October 2026 Artificial Analysis's run of Harvey's Legal Agent Benchmark on Harvey's newer private set of 120 tasks across 24 practice areas. A deliverable with a material hallucination scores zero, and the headline is the share of judges who find every rubric criterion passed.
Artificial Analysis says scores do not compare with version 1.0, whose headline was the criterion pass rate. The setup also differs from Harvey's own runs on the Harvey LAB record.
- Made by
- Artificial Analysis
- Released
- October 2026
- Kind
- Law
- Level
- Expert
- Scored
- Graded by a model
- Answers
- Open-ended
- Tasks
- Kept private
- Strongest model tested
- Claude Fable 5.2 #1 on the capability index
- Last in a launch post
- October 2026
- Last model added
- November 2026
Muse Wonder Full leads with 13.1%
Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.
- 1 Muse Wonder Full 13.1%
- 2 Muse Wonder 10%
- 3 Claude Fable 5.2 7.20%
Source: Labs’ model cards
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Muse Wonder Full | 13.1% | Oct 2026 | Lab model card | |
| 2 | Muse Wonder | 10% | Oct 2026 | Lab model card | |
| 3 | Claude Fable 5.2 | 7.20% | Nov 2026 | Lab model card |
Number one over time
Lab claims count from the day the card came out, independent runs from the model’s release.
Source: Labs’ model cards
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Source: Labs’ model cards
One lab put it in a launch post in the last six months
Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.
| Date | Launch post | Score | As the post writes it |
|---|---|---|---|
| Oct 12, 2026 | Muse Wonder | 10 | Harvey LAB-AA |
| Oct 12, 2026 | Muse Wonder Full | 13.1 | Harvey LAB-AA |
3 system cards report it, from 2 labs
Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.
| Date | Document | Score | As the document writes it | Section |
|---|---|---|---|---|
| Nov 9, 2026 | Claude Fable 5.2 system card | 7.2 | Harvey LAB-AA v1.1, hallucination-gated all-pass rate, max effort, updated private set, three judges. All-pass before hallucination gate 10.8%. Not comparable with v1.0 or Harvey public LAB (Section 8.14.2) | Capabilities |
| Oct 12, 2026 | Muse Wonder model card | 10 | Harvey LAB-AA, Artificial Analysis version 1.1 with hallucination checks, Muse Wonder (max) (capabilities table image, page 3) | Capabilities |
| Oct 12, 2026 | Muse Wonder Full model card | 13.1 | Harvey LAB-AA, Artificial Analysis version 1.1 with hallucination checks, Muse Wonder Full (max) (capabilities table image, page 3) | Capabilities |
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