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FrontierCode 1.1 (Extended)

Implementation

Progress Over Time

Interactive timeline showing model performance evolution on FrontierCode 1.1 (Extended)

State-of-the-art frontier
Open
Proprietary

FrontierCode 1.1 (Extended) Leaderboard

3 models
ContextCostLicense
1—1.0M$2.00 / $10.00
2—1.1M$2.00 / $10.00
3
Anthropic
Anthropic
—1.0M$0.10 / $0.50
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About this benchmark

What is FrontierCode 1.1 (Extended)?

FrontierCode 1.1 Extended subset: agentic coding tasks graded for mergeable patches, reported separately from the Main subset.

FrontierCode 1.1 (Extended) is a text benchmark evaluating models on reasoning, agents, and code tasks. LLM Stats tracks 3 models on this benchmark, scored on a 0–1 scale. The current average is 0.6, with the leader at 0.6.

Compare leaders on the best AI for reasoning, best AI for agents and best AI for code leaderboards.

Current leaders

Claude Sonnet 5.5 from Anthropic currently leads the FrontierCode 1.1 (Extended) leaderboard with a score of 0.644 across 3 evaluated AI models.

1Claude Sonnet 5.5Anthropic64.4%
2GPT-6.1 SolOpenAI60.4%
3Claude Haiku 5.5Anthropic58.4%

FAQ

Common questions about the FrontierCode 1.1 (Extended) benchmark and leaderboard.

What is the FrontierCode 1.1 (Extended) benchmark?

FrontierCode 1.1 Extended subset: agentic coding tasks graded for mergeable patches, reported separately from the Main subset.

What is the FrontierCode 1.1 (Extended) leaderboard?

The FrontierCode 1.1 (Extended) leaderboard ranks 3 AI models based on their performance on this benchmark. Currently, Claude Sonnet 5.5 by Anthropic leads with a score of 0.644. The average score across all models is 0.611.

What is the highest FrontierCode 1.1 (Extended) score?

The highest FrontierCode 1.1 (Extended) score is 0.644, achieved by Claude Sonnet 5.5 from Anthropic.

How many models are evaluated on FrontierCode 1.1 (Extended)?

3 models have been evaluated on the FrontierCode 1.1 (Extended) benchmark, with 0 verified results and 2 self-reported results.

Where can I find the FrontierCode 1.1 (Extended) dataset?

The FrontierCode 1.1 (Extended) dataset is available at https://cognition.com/frontiercode.

What categories does FrontierCode 1.1 (Extended) cover?

FrontierCode 1.1 (Extended) is categorized under reasoning, agents, and code. The benchmark evaluates text models.

What's the difference between FrontierCode 1.1 (Extended) and FrontierCode 1.1?

FrontierCode 1.1 (Extended) is a variant of FrontierCode 1.1. See the FrontierCode 1.1 leaderboard for the broader benchmark and per-model comparison.

Which model offers the best value on FrontierCode 1.1 (Extended)?

Among models scoring within 10% of the leader, Claude Haiku 5.5 from Anthropic is the cheapest, at $0.10 per million input tokens with a score of 0.584.

How recent are the FrontierCode 1.1 (Extended) leaderboard results?

The FrontierCode 1.1 (Extended) leaderboard was last updated in October 2026 and currently includes 3 evaluated models.