AA-Briefcase v1.1 leaderboard
As of November 14, 2026, among the results listed here, Anthropic Claude Opus 5.5 has the highest reported AA-Briefcase v1.1 score, 1822, published by Anthropic, ahead of Anthropic Claude Sonnet 5.5 at 1811. 11 models have a AA-Briefcase v1.1 result in our records.
Scores as the model makers published them, not re-run by us; each row links to its announcement.
9 models ranked · 4 makers
| Rank | Model | Score | Setting | Reported by | Date |
|---|---|---|---|---|---|
| 1 | Claude Opus 5.5 | 1822 | Not published | Anthropic | June 30, 2026 (model release) |
| 2 | Claude Sonnet 5.5 | 1811 | Not published | Anthropic | June 30, 2026 (model release) |
| 3 | Grok 4.7 | 1657 | xHigh | xAI | September 21, 2026 |
| 4 | Claude Haiku 5.5 | 1578 | Not published | Anthropic | October 7, 2026 (model release) |
| 5 | Grok 4.6 | 1546 | High | xAI | September 21, 2026 |
| 6 | T Inkling 2 Small | 1527 | Not published | Thinking Machines | November 9, 2026 (model release) |
| 7 | Step 5 Preview | 1433 | High | StepFun | October 8, 2026 (model release) |
| 8 | Claude Sonnet 5 | 1359 | Not published | Anthropic | June 30, 2026 (model release) |
| 9 | Claude Haiku 4.5 | 614 | Not published | Anthropic | October 7, 2026 (model release) |
Reported in other units
| Model | Score | Setting | Reported by | Date |
|---|---|---|---|---|
| Claude Fable 5.1 | 1669 | Not published | Anthropic | November 9, 2026 (model release) |
| Claude Fable 5.1 | 61.5% | rubric | Anthropic | November 9, 2026 (model release) |
| Claude Fable 5.2 | 1785 | Not published | Anthropic | November 9, 2026 (model release) |
| Claude Fable 5.2 | 66.1% | rubric | Anthropic | November 9, 2026 (model release) |
| Claude Opus 5.5 | 1800 | Not published | Anthropic | November 9, 2026 (model release) |
| Claude Opus 5.5 | 61.2% | rubric | Anthropic | November 9, 2026 (model release) |
How much to trust these numbers
- Source
- Reported by the model makers themselves. Not re-run by LLMBenchmark or anyone independent.
- Settings
- Settings differ between makers. Check the Setting column before comparing two scores.
- Spread
- 1822 to 614 across 9 models.
- Freshness
- Newest result published November 9, 2026; oldest June 30, 2026.
What AA-Briefcase v1.1 measures
It tests agents on multi-week knowledge work projects using thousands of input files and reports a combined Elo score. Source: Announcing AA-Briefcase: a frontier knowledge work ...