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# The best AI model read 50.6% of ClockBench clocks correctly in March 2026; humans manage about 90%
- URL: https://aiadoption.org/data/clockbench-leaderboard/
- Published: 2026-10-19T15:55:12.000Z
- Updated: 2026-10-21T06:02:42.000Z
- Description: GPT-5.4 High read 50.6% of ClockBench's clocks correctly in March 2026, the best of 15 models, against about 90% for humans. The next best, Qwen 3-VL 235B Instruct, scored 39.4%.
- Author: Manu
- Tags: Data, AI Benchmarks, Computer Vision, #chart, #ai-index-2026, #hub-benchmarks

50.6%

#1

ClockBench accuracy of GPT-5.4 High in March 2026, the best of the top 15; humans score about 90%

GPT-5.4 High50.6%

Qwen 3-VL 235B Instruct39.4%

Gemini 3.1 Pro32.2%

## What the chart shows

ClockBench scales up clock reading to 180 clock designs and 720 questions. In March 2026 GPT-5.4 High led with 50.6%, ahead of Qwen 3-VL 235B Instruct (39.4%) and Gemini 3.1 Pro (32.2%). Humans read correctly formatted clocks about 90% of the time.

Ten of the 15 models scored 15% or less, including Claude Opus 4.6 at 8.9%. The report adds that when models got the time wrong, their median error was one to three hours, against three minutes for humans.

## Key numbers

| Measure                 | Value      |
| ----------------------- | ---------- |
| GPT-5.4 High            | 50.6%      |
| Qwen 3-VL 235B Instruct | 39.4%      |
| Gemini 3.1 Pro          | 32.2%      |
| Gemini 3 Pro            | 28.9%      |
| Claude Opus 4.6         | 8.9%       |
| Human baseline (report) | 90.1–90.7% |

## How to read it

- Top 15 models on the ClockBench leaderboard (clockbench.ai), March 2026.
- The human baseline is not in the data file; the report’s text gives 90.1% and its chart 90.7%, so we say about 90% and draw the line at 90%.
- Qwen 3-VL 235B scored 39.4% in its instruct version and 14.4% in its thinking version.

**Source:** [ClockBench Leaderboard](https://aiadoption.org/sources/#clockbench), 2026, via the AI Index Report 2026 (Stanford HAI), figure 2.4.8: *ClockBench: accuracy*. Chart and text by AI Adoption.  
Numbers checked against the published data on 20 October 2026.  
[Download the data (CSV)](https://charts.aiadoption.org/ai-index/csv/clockbench-leaderboard.csv?ref=aiadoption.org) · [Cite this chart](#source)