Human Behavior Bench
Gemini 4 Argon 80.6 leads since October 2026 Models predict how specified groups of U.S. adults answer closed survey questions, as a distribution over options. Scored as 1 minus total variation distance.
1,199 tasks, 239 public and 960 private, from surveys run June to September 2026. Launched October 20th, 2026.
- Made by
- Rehearsals with Google DeepMind and Kaggle
- Released
- October 2026
- Kind
- Real-world events
- Level
- Expert
- Scored
- Checked automatically
- Answers
- Prediction
- Tasks
- Public, plus a private test set
- Strongest model tested
- Claude Opus 5.5 #4 on the capability index
- Last model added
- September 2026
- Scores refreshed
- November 12th, 2026
Gemini 4 Argon leads with 80.6
Best score per model from the benchmark's own leaderboard, read on November 12th, 2026. Where a model ran with several settings or harnesses, we keep its best.
- 1 Gemini 4 Argon 80.6
- 2 Claude Opus 5 80.2
- 3 Gemini 3.7 Flash 79.7
- 4 GPT-5.6 Sol 79.5
- 5 Claude Opus 5.5 79.3
- 6 Gemini 3.8 Flash 79.2
- 7 Gemini 3 Flash 78.5
- 8 GPT-5.6 Terra 77.8
- 9 Gemini 3.5 Flash-Lite 75.9
- 10 Grok 4.7 75.2
- 11 Grok 4.20 non-reasoning 73.5
Source: Official Human Behavior Bench leaderboard
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Gemini 4 Argon | 80.6 | Sep 2026 | Official leaderboard | |
| 2 | Claude Opus 5 | 80.2 | Jul 2026 | Official leaderboard | |
| 3 | Gemini 3.7 Flash | 79.7 | Aug 2026 | Official leaderboard | |
| 4 | GPT-5.6 Sol | 79.5 | Jul 2026 | Official leaderboard | |
| 5 | Claude Opus 5.5 | 79.3 | Sep 2026 | Official leaderboard | |
| 6 | Gemini 3.8 Flash | 79.2 | Sep 2026 | Official leaderboard | |
| 7 | Gemini 3 Flash | 78.5 | Dec 2025 | Official leaderboard | |
| 8 | GPT-5.6 Terra | 77.8 | Jul 2026 | Official leaderboard | |
| 9 | Gemini 3.5 Flash-Lite | 75.9 | Jul 2026 | Official leaderboard | |
| 10 | Grok 4.7 | 75.2 | Sep 2026 | Official leaderboard | |
| 11 | Grok 4.20 | 73.5 | non-reasoning | Feb 2026 | Official leaderboard |
Number one over time
Lab claims count from the day the card came out, independent runs from the model’s release.
Source: Official Human Behavior Bench leaderboard
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Source: Official Human Behavior Bench leaderboard
No lab model card reports it yet
We read the headline results of 522 launch posts from 52 labs, and none of them list this benchmark.
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