CursorBench 3.2

Claude Fable 5.1 73.4% leads since September 2026

In use

Agents do ambiguous multi-file coding tasks from real Cursor sessions in Cursor's harness. Version 3.2 added instruction following and advanced tool use problems. Agentic graders score correctness.

Cursor's changelog dates it July 8th, 2026. It changed the task mix, so scores do not compare with 3.1. xAI's Grok 4.6 card and Anthropic's Fable 5.1 card name this version.

Made by: Cursor
Released: July 2026
Kind: Fixing real repositories
Level: Expert
Scored: Graded by a model
Answers: Code
Tasks: Kept private

Strongest model tested: Claude Fable 5.1 #7 on the capability index
Last in a launch post: September 2026
Last model added: September 2026

Models scored in lab cards

Launch posts list it, from 2 labs

System cards report it, from 2 labs

Claude Fable 5.1 leads with 73.4%

Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.

Bars Table

1 Claude Fable 5.1 73.4%
2 Grok 4.6 70.8%

Source: Labs’ model cards

#	Model	Score	Setting	Date	Source
1	Claude Fable 5.1	73.4%		Sep 2026	Lab model card
2	Grok 4.6	70.8%		Aug 2026	Lab model card

2 models have held number one in labs’ own numbers since its release in July 2026

Lab claims count from the day the card came out, independent runs from the model’s release.

xAI Anthropic

Lab claims Replaced by 4.0, Sep 2026

Claude Fable 5.1 73.4%

Source: Labs’ model cards

Scores over time

All the scores we have, one dot each, so a model tested at several settings appears more than once.

Reported by the lab in its model card Best so far

Source: Labs’ model cards

2 labs put it in a launch post in the last six months

Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.

xAI

Anthropic

Date	Launch post	Score	As the post writes it
Sep 1, 2026	Claude Fable 5.1	73.4	Agentic coding CursorBench 3.2.0
Aug 12, 2026	Grok 4.6	69.9	CursorBench v3.2

2 system cards report it, from 2 labs

Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.

Date	Document	Score	As the document writes it	Section
Sep 1, 2026	Claude Fable 5.1 system card	73.4	CursorBench 3.2.0 at max effort, measured by Cursor; 68.0% at medium effort (8.8)	Capabilities
Aug 12, 2026	Grok 4.6 model card	70.8	CursorBench 3.2, xhigh, Cursor agent harness, run by Cursor (2.1 text). High = 69.9%	Capabilities

Versions

We switch the top row to each new version when it comes out. Open it for one row per version. An old version stays in play while people still test it, so whoever first takes it past 85% gets credit for closing it out.