# FrontierCode 2.0, Artificial Analysis evaluation (FrontierCode 2.0 (AA))

> Artificial Analysis's own run of Cognition's FrontierCode 2.0 coding-agent benchmark, one of the nine evaluations in its Intelligence Index v5, judged on whether each pull request is mergeable.

Canonical page: https://benchlm.ai/benchmarks/aafrontiercode2

- Category: [Coding](/coding)
- Last updated: November 11, 2026

## About FrontierCode 2.0 (AA)

- Year: 2026
- Tasks: 132 private software-engineering tasks
- Format: Weighted rubric score with blocking criteria
- Difficulty: Frontier coding-agent quality
- Paper: [Artificial Analysis Intelligence Index](https://artificialanalysis.ai/)

Artificial Analysis runs FrontierCode 2.0 under its own harness, so its scores differ from the Cognition-published FrontierCode 2.0 table that BenchLM stores on the FrontierCode 2.0 page (for example Claude Haiku 5.5 at 34.9 here and 27.7 there). BenchLM first added this lane from Meta's Muse Ember launch post, which quotes the Artificial Analysis values, and keeps it display-only.

FrontierCode 2.0 (AA) is currently displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Leaderboard (3 models)

| Rank | Model | Creator | Score |
|------|-------|---------|-------|
| 1 | [Claude Haiku 5.5](/models/claude-haiku-5-5) | Anthropic | 34.9% |
| 2 | [Muse Ember](/models/muse-ember) | Meta | 27.2% |
| 3 | [GPT-6 Luna](/models/gpt-6-luna) | OpenAI | 25.2% |

## FAQ

### What does FrontierCode 2.0 (AA) measure?

Artificial Analysis's own run of Cognition's FrontierCode 2.0 coding-agent benchmark, one of the nine evaluations in its Intelligence Index v5, judged on whether each pull request is mergeable.

### Which model scores highest on FrontierCode 2.0 (AA)?

Claude Haiku 5.5 by Anthropic currently leads with a score of 34.9% on FrontierCode 2.0 (AA).

### How many models are evaluated on FrontierCode 2.0 (AA)?

3 AI models have published results on FrontierCode 2.0 (AA) in the BenchLM catalog.

### Does FrontierCode 2.0 (AA) affect BenchLM's overall score?

Not directly. FrontierCode 2.0 (AA) is still displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Compare Top Models on FrontierCode 2.0 (AA)

- [Claude Haiku 5.5 vs Muse Ember](/compare/claude-haiku-5-5-vs-muse-ember)
- [Muse Ember vs GPT-6 Luna](/compare/gpt-6-luna-vs-muse-ember)