---
license: cc-by-4.0
task_categories:
  - text-generation
  - text2text-generation
language:
  - en
tags:
  - code
  - agent
  - swe-bench
  - bug-fixing
  - autonomous-agent
  - benchmark
pretty_name: Daniel Benchmark v1 — Autonomous Agent Head-to-Head
size_categories:
  - n<1K
---

# Daniel Benchmark v1

A public head-to-head benchmark comparing **Daniel** (Cognitive AI) and **Devin** (Cognition AI) on 6 real bugs from widely used open-source libraries.

## Key results

- **Pass rate:** Both agents 6/6 (100%)
- **Daniel cost:** $1.45 total ($0.24/bug)
- **Devin cost:** $4.91 total ($0.82/bug)
- **Daniel is 70% cheaper at equal accuracy**

All pull requests are public. Graded by each project's own hidden test suite — neither agent saw the tests.

## Dataset fields

| Field | Type | Description |
|-------|------|-------------|
| `instance_id` | string | Unique identifier for the bug instance |
| `repo` | string | `owner/repo` on GitHub |
| `language` | string | Primary language of the repo |
| `issue_title` | string | The bug description given to both agents |
| `issue_url` | string | Original GitHub issue URL |
| `daniel_result` | string | `pass` or `fail` |
| `daniel_pr_url` | string | Link to Daniel's pull request |
| `daniel_time_s` | int | Seconds from start to PR opened |
| `daniel_cost_usd` | float | Claude API cost in USD |
| `devin_result` | string | `pass` or `fail` |
| `devin_time_s` | int | Seconds from start to PR opened |
| `devin_cost_usd` | float | Devin session cost in USD |
| `graded_by` | string | Always `maintainer_hidden_tests` |
| `benchmark_round` | int | Iteration number (Daniel ran 4 rounds; table uses best passing round) |

## Repos tested

- `python-humanize/humanize` — Python
- `more-itertools/more-itertools` — Python
- `jshttp/mime-types` — JavaScript (Express ecosystem)
- `sindresorhus/pretty-bytes` — JavaScript
- `sindresorhus/camelcase` — JavaScript
- `pillarjs/path-to-regexp` — JavaScript (Express ecosystem)

## Methodology

1. Picked recent, real bug fixes from widely used libraries
2. Forked each project at the commit just before the maintainers' own fix
3. Gave both agents an identical issue-style prompt with no hints about the fix
4. Graded each PR by overwriting test files with the maintainer versions and running the project's test command
5. All PRs are public

## See also

- 📊 [Live benchmark page](https://www.cognitivedaniel.com/devin-alternative)
- 🤖 [Daniel model card](https://huggingface.co/cognitivedaniel/daniel)
- 💻 [GitHub](https://github.com/2badagoldman/cognitive-daniel)

## Upcoming: v2 (10-bug suite)

The next version will include 10 harder bugs from Django, FastAPI, SQLAlchemy, TypeScript, Next.js, Elasticsearch, Kubernetes, Spring Boot, Pandas, and Apache Airflow — testing multi-file and cross-language fixes. Competitors will include OpenHands and SWE-agent in addition to Devin.

## Citation

```bibtex
@misc{cognitive-ai-daniel-benchmark-2026,
  title={Daniel Benchmark v1: Autonomous AI Agent Head-to-Head on Real Open-Source Bugs},
  author={Cognitive AI},
  year={2026},
  url={https://huggingface.co/datasets/cognitivedaniel/daniel-benchmark-v1}
}
```