Artificial Analysis Coding Agent Index v2.0 switches to FrontierCode, Claude Opus 5.5 leads

1. 1:24 PM
   Cognition@cognitionOfficial

   Cognition launches FrontierCode 2.0, a coding benchmark where top model scores 45%

   AICognition introduces FrontierCode 2.0, a coding benchmark that tests whether a model's pull request should be merged, not just whether it meets a spec. The benchmark uses more diverse tasks, larger scopes, higher mergeability standards, and deliberately underspecified prompts that require model judgment. The top model scores 45%, which Cognition says shows the benchmark is far from saturated.

   
2. 1:00 PM
   Cognition Blog (Devin, Windsurf)OfficialPick

   Cognition releases FrontierCode 2.0, a coding benchmark where top model scores 45%

   AICognition introduces FrontierCode 2.0, a coding benchmark built with more than 20 open-source maintainers across 55% more repositories. The top-performing model, Claude Opus 5.5, scores 45.5%, down from 54.6% on FrontierCode 1.1. Thoroughness criteria, which test unstated correctness requirements, account for the largest share of blockers and have the highest failure rate at every reasoning effort level.

1. 10:33 AM
   meng shao@shao__mengX

   Artificial Analysis Coding Agent Index v2.0 ranks Claude Opus 5.5 first at 61.7

   AIArtificial Analysis released v2.0 of its Coding Agent Index, which evaluates models with their agent harnesses across 290 tasks. Claude Code with Claude Opus 5.5 (max) leads at 61.7, and FrontierCode v1.1 replaces DeepSWE. The mean score for the same 21 configurations fell from 54.8 to 47.4 under the new version.

   

1. 8:17 PM
   Artificial Analysis@ArtificialAnlysOfficial

   Artificial Analysis launches Coding Agent Index v2.0 with FrontierCode v1.1

   AIArtificial Analysis launched v2.0 of its Coding Agent Index, which now covers 290 tasks across software engineering, terminal use, and repository Q&A, with the three benchmarks weighted equally. FrontierCode v1.1 from Cognition replaces DeepSWE v1.1, and Claude Code with Claude Opus 5.5 (max) leads at 61.7. The source says the Index will keep updating with more evaluations and agents.

   

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