# Frontiercode

FrontierCode is Cognition's test of coding agents, and it asks whether a project's
maintainers would actually merge the agent's patch, not only whether the tests pass.
Cognition launched it in June 2026 with 150 tasks from 36 open-source repositories, built
by more than 20 of those projects' maintainers. Version 1.1 came out in July 2026 and is
still the current version as of October 2026.

Each task carries criteria its maintainer wrote: tests, build and lint checks, limits on
which files and how many lines a patch may touch, and an LLM review of the code. Some are
blockers, the problems a reviewer would refuse a pull request over, and failing one scores
the attempt zero. The leaderboard reports a score and a pass rate on Main, the 100 hardest
tasks, and on Extended, all 150. The top score on Main as of October 2026 is about 55%.

The tasks are private, so you can't run it on your own agent. Cognition runs the official
leaderboard and ranks its own model on it. Artificial Analysis runs a separate version with
every model in one shared harness, and it ranks some models in a different order.

## Questions answered under this concept

- [Can I run FrontierCode on my own coding agent?](https://tessary.ai/answers/frontiercode/can-i-run-frontiercode-on-my-own-coding-agent)
- [Does a high FrontierCode score mean an agent will work in production?](https://tessary.ai/answers/frontiercode/does-a-high-frontiercode-score-mean-an-agent-will-work-in-production)
- [What changed in the latest version of FrontierCode?](https://tessary.ai/answers/frontiercode/what-changed-in-the-latest-version-of-frontiercode)
- [What does a FrontierCode score mean?](https://tessary.ai/answers/frontiercode/what-does-a-frontiercode-score-mean)
- [What is FrontierCode?](https://tessary.ai/answers/frontiercode/what-is-frontiercode)
- [Why are FrontierCode scores lower than SWE-bench Pro scores?](https://tessary.ai/answers/frontiercode/why-are-frontiercode-scores-lower-than-swe-bench-pro-scores)
- [Why do FrontierCode leaderboards disagree?](https://tessary.ai/answers/frontiercode/why-do-frontiercode-leaderboards-disagree)

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Source: https://tessary.ai/answers/frontiercode
All concepts: https://tessary.ai/answers
From Tessary, agent reliability for AI agents in production: https://tessary.ai