MBE (Multistate Bar Examination)
Models answer the 200 multiple choice questions of an official Multistate Bar Examination practice exam. Scored by accuracy.
Anthropic used the official NCBE 2021 MBE practice exam. The uniform-bar-exam record covers the full bar exam.
- Made by
- NCBE
- Kind
- Law
- Level
- Expert
- Scored
- Checked automatically
- Answers
- Multiple choice
- Strongest model tested
- Claude 3 Opus #172 on the capability index
- Last in a system card
- March 2024
- Last model added
- March 2024
Claude 3 Opus leads with 85% among models released by March 2024
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.
The newest model with a score here came out in March 2024, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:
- Claude Fable 5.2
-
Gemini 4 Carbon - GPT-6 Astra
- Claude Opus 5.5
- and 16 more
- 1 Claude 3 Opus 85%
- 2 Claude 2 76.5%
- 3 Claude 3 Sonnet 71%
- 4 Claude 3 Haiku 64%
Source: Labs’ model cards
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Claude 3 Opus | 85% | Mar 2024 | Lab model card | |
| 2 | Claude 2 | 76.5% | Jul 2023 | Lab model card | |
| 3 | Claude 3 Sonnet | 71% | Mar 2024 | Lab model card | |
| 4 | Claude 3 Haiku | 64% | Mar 2024 | Lab model card |
2 models have held number one in labs’ own numbers since 2023
Lab claims count from the day the card came out, independent runs from the model’s release.
Source: Labs’ model cards
Anthropic’s own number for Claude 3 Opus passed 85% in March 2024
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Source: Labs’ model cards
Labs report it only in system cards
We read the headline results of 522 launch posts from 52 labs, and none of them list this benchmark. Some system cards do, below.
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 |
|---|---|---|---|---|
| Mar 4, 2024 | Claude 3 Sonnet model card | 71 | MBE (multistate bar exam), 0-shot CoT, NCBE 2021 practice exam (Table 2) | Capabilities |
| Mar 4, 2024 | Claude 3 Opus model card | 85 | MBE (multistate bar exam), 0-shot CoT, NCBE 2021 practice exam (Table 2) | Capabilities |
| Mar 4, 2024 | Claude 3 Haiku model card | 64 | MBE (multistate bar exam), 0-shot CoT, NCBE 2021 practice exam (Table 2) | Capabilities |
| Jul 11, 2023 | Claude 2 model card | 76.5 | MBE (5-shot, no CoT), 76.5% (153/200), NCBE 2021 practice exam (4.3.2) | Capabilities |
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