CodeAssay: leaderboard
CodeAssay (2026) is a Python code-generation benchmark of 185 audited tasks in ten software-engineering categories. A model gets the description, signature and public-test excerpt, may repair once after public-test failures, and is graded on disjoint hidden tests; the score is the percent of tasks passed, higher is better. This board uses the standard system prompt.
Metric: Final hidden-test correctness (%; share of 185 audited Python tasks in ten software-engineering categories whose scored solution passes every hidden test; one generation from the description, signature and a public-test excerpt plus at most one repair guided by public-test failures; provider-default reasoning, temperature 0 where accepted, 16,384-token output limit; standard system prompt). Source: arxiv.org. Saturation forecast: Estimated already saturated. 7 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-5.6 Sol | 98.9 | #30 |
| 2 | Claude Sonnet 5 | 98.9 | #111 |
| 3 | Claude Haiku 4.5 | 96.8 | #568 |
| 4 | Claude Sonnet 4.5 | 95.1 | #250 |
| 5 | Gemini 2.5 Flash | 91.4 | #453 |
| 6 | GPT-4o | 87 | #741 |
| 7 | GPT-4o Mini | 77.3 | #1623 |
No result here: #1 Claude Fable 5.2, #2 Gemini 4 Carbon, #5 Claude Opus 5.5.
Interactive version: theaggregate.ai/benchmark?slug=codeassay · How It Works · Data refreshed daily, snapshot 2026-11-13.