What is the best open LLM on CursorBench?

GLM 5.3 is the top open model on CursorBench, scoring 42.6%. Among all models tested — including proprietary ones — it ranks #20. The top model overall is Claude Opus 5.5 Max (Anthropic) at 57.8%.

Can open models match proprietary models on CursorBench?

Not quite on CursorBench: the strongest proprietary model (Claude Opus 5.5 Max) scores 57.8%, ahead of the best open model (GLM 5.3) at 42.6% — but you can run the open one yourself.

Coding

CursorBench Leaderboard

Name: CursorBench — open LLM scores
Creator: epoch

CursorBench, from Cursor (Anysphere), measures agentic coding on tasks drawn from real Cursor engineering sessions rather than synthetic puzzles. Each model is run at several reasoning-effort levels, and Epoch AI reports the correctness score.

Source: epoch2 open models ranked+57 proprietaryData through Sep 2026

Open models All models

Open models ranked on CursorBench

# shows rank among open models / rank overall (including proprietary).

#	Model	Score
1 / 20	GLM 5.3 · 753.3B	42.6%
2 / 33	GLM 5.3 Flash · 321.3B	36.8%

CursorBench: frequently asked questions

What is the best open LLM on CursorBench?: GLM 5.3 is the top open model on CursorBench, scoring 42.6%. Among all models tested — including proprietary ones — it ranks #20. The top model overall is Claude Opus 5.5 Max (Anthropic) at 57.8%.
Can open models match proprietary models on CursorBench?: Not quite on CursorBench: the strongest proprietary model (Claude Opus 5.5 Max) scores 57.8%, ahead of the best open model (GLM 5.3) at 42.6% — but you can run the open one yourself.

Scores aggregated from epoch. llmrun does not run this benchmark — see the source for methodology, or the about benchmarks for what it measures.