AA-Briefcase v1.1
Version 1.1 of Artificial Analysis's multi-hour office work evaluation, with Elo ratings fitted by Crowd-BT.
Changes only how Elo ratings are fitted. Artificial Analysis says scores shift but the ranking mostly holds, so v1 and v1.1 Elo values do not compare. Part of Intelligence Index v4.3.2 and v5.
- Made by
- Artificial Analysis
- Released
- September 2026
- Kind
- Tasks from real jobs
- 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
- November 2026
- Last model added
- November 2026
Claude Opus 5.5 leads with 1,822
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.
Bars start at 1,400.
- 1 Claude Opus 5.5 1,822
- 2 Claude Sonnet 5.5 1,811
- 3 Claude Fable 5.2 1,785
- 4 Kimi K3.1 Pro 1,678
- 5 Grok 4.7 1,657
- 6 Claude Haiku 5.5 1,578
- 7
Inkling 2 Small 1,527 - 8
Step 5 Preview 1,433
Source: Labs’ model cards
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Claude Opus 5.5 | 1,822 | Sep 2026 | Lab model card | |
| 2 | Claude Sonnet 5.5 | 1,811 | Sep 2026 | Lab model card | |
| 3 | Claude Fable 5.2 | 1,785 | Nov 2026 | Lab model card | |
| 4 | Kimi K3.1 Pro | 1,678 | Oct 2026 | Lab model card | |
| 5 | Grok 4.7 | 1,657 | Sep 2026 | Lab model card | |
| 6 | Claude Haiku 5.5 | 1,578 | Oct 2026 | Lab model card | |
| 7 | Inkling 2 Small | 1,527 | Nov 2026 | Lab model card | |
| 8 | Step 5 Preview | 1,433 | Sep 2026 | Lab model card |
3 models have held number one in labs’ own numbers since its release in September 2026
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
5 labs 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 |
|---|---|---|---|
| Nov 9, 2026 | Claude Fable 5.2 | 1785 | Knowledge work AA-Briefcase v1.1, 1785 Elo at max effort. Rubric pass rate 66.1% (launch table and Table 8.1.A) |
| Nov 5, 2026 | Inkling 2 Small | 1527 | AA-Briefcase v1.1 |
| Oct 24, 2026 | Kimi K3.1 Pro | 1678 | AA-Briefcase v1.1 (Elo-score) |
| Oct 7, 2026 | Claude Haiku 5.5 | 1578 | Knowledge work AA-Briefcase v1.1 |
| Sep 28, 2026 | Claude Sonnet 5.5 | 1811 | Knowledge work AA-Briefcase v1.1 |
| Sep 22, 2026 | Claude Opus 5.5 | 1822 | AA-Briefcase v1.1 |
| Sep 21, 2026 | Grok 4.7 | 1657 | AA Briefcase v1.1 (Multi-hour office work) |
| Sep 20, 2026 | Step 5 Preview | 1433 | AA-Briefcase v1.1 |
4 system cards report it, from 1 lab
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 | 1785 | AA-Briefcase v1.1 Elo, max effort, independently run by Artificial Analysis. Xhigh 1738. Rubric pass rate 66.1%. Elo follows the Fable 5.1 record (Table 8.1.A and Section 8.14.4) | Capabilities |
| Oct 7, 2026 | Claude Haiku 5.5 system card | 1578 | AA-Briefcase v1.1, Elo at max effort (medium 1372) (Table 8.1.A) | Capabilities |
| Sep 28, 2026 | Claude Sonnet 5.5 system card | 1811 | AA-Briefcase v1.1 Elo at max effort, run by Artificial Analysis (Table 8.1.A, 8.14.4) | Capabilities |
| Sep 22, 2026 | Claude Opus 5.5 system card | 1822 | AA-Briefcase v1.1 Elo at max effort, run by Artificial Analysis (1780 at xhigh, 1705 at high) (Table 8.1.A, 8.14.4) | Capabilities |
Versions
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