FrontierCode 1.1 Main
Cognition's FrontierCode 1.1 Main evaluation measures whether coding agents produce mergeable changes on the 100 hardest tasks from its 150-task Extended set. It reports a mean@5 composite of held-out test performance and weighted code quality; Main remains distinct from the full Extended variant. High benchmark score alone doesn't make a model the right pick — weigh it against pricing, API availability, and release date.
Models ranked
1
tracked on this benchmark
Score band
53.4 – 53.4
best → lowest tracked
Snapshot trend
—
need ≥2 snapshots
Leaderboard
Tracked models ranked by Mean@5 score (higher is better).
Configuration: Medium effort
Notes: Source: p.150, Figure 8.3. Medium is the reported Opus 5 setting; preserve it and keep Main separate from Extended.
How to read this benchmark
This benchmark scores models where higher is better. Scores are useful for directional filtering and shortlisting — not for universal quality ranking. Prefer benchmarks closest to your workload, then validate the linked model pages for pricing, context window, and provider availability.
Trust this score when
- There is a fresh timestamped snapshot (or multiple snapshots) for this benchmark.
- The model list covers the same version family you can actually deploy today.
- Top candidates overlap with your required routing and feature requirements.
Be cautious when
- There is only one benchmark snapshot or the dataset appears stale.
- The benchmark metric direction is opposite of your decision objective.
- The score difference between options is narrow and likely within implementation variance.
FAQ
What does the FrontierCode 1.1 Main benchmark measure?
Cognition's FrontierCode 1.1 Main evaluation measures whether coding agents produce mergeable changes on the 100 hardest tasks from its 150-task Extended set. It reports a mean@5 composite of held-out test performance and weighted code quality; Main remains distinct from the full Extended variant. On this page it lists 1 tracked model variant where higher is better.
Is a higher FrontierCode 1.1 Main score always better?
For this benchmark, higher is better. A high score helps you shortlist, but confirm pricing, context window, and provider availability on each model page before committing — the top scorer is not always the right pick for your workload or budget.
How current is this FrontierCode 1.1 Main data?
This benchmark was last reviewed on Jul 26, 2026. Re-check the linked model pages for the freshest provider and pricing detail.
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Last reviewed: Jul 26, 2026