Levelmodel
Classcode
Parametersnot in the notes
Contextnot in the notes
Released19 Mar 2026
Opennessproprietary
Runs onnot in the notes
Statusactive
Benchmark Results
vendor-reported
CursorBenchcoding
vendor-reported
61.3
050100
Score in %. Higher is better.
SWE-bench Multilingualcoding
vendor-reported
73.7
050100
Score in %. Higher is better.
Terminal-Bench 2.0agents and tool use
vendor-reported
61.7
050100
Score in %. Higher is better.
Where this comes from
Every score names who ran it: vendor-reported, maintainer-run or independent. A rank is shown with the population it was ranked in (gap rule 3).
Lineage
successorfinetune
Composer 2.5 is a child (successor)medium confidencenotesWhere this comes from
Parent and child relations from model cards, Hugging Face base_model fields and the genealogy tables of the research notes. The tree shows two generations each way, 3 models. Confidence and evidence are the notes' own.
Identity
- Developer
- Anysphere (Cursor)
- Family
- Composer
- Released
- 19 Mar 2026 sourcesannouncement page
- Weights published
- –
- Record checked
- 10 Oct 2026
Where this comes from
Developer and dates from the research notes. Release date is the vendor's public announcement; weights date is when open weights were published.
Architecture and Size
- Architecture
- not in the notes Continued pretraining of an unnamed base, then RL
- Total parameters
- – sources
- Active parameters
- –
- Checkpoint parameters
- –
- Context length
- not in the notes
- Input
- text
- Output
- text
Where this comes from
Parameter counts as the developer states them. Where the checkpoint holds a different total, both are shown (register A16).
Openness and Access
- Openness
- proprietary
- Licence
- Proprietary sources
- Access routes
- consumer app
Where this comes from
The licence file governs over registry tags and aggregator labels.
Deployment
- Runs on
- not in the notes
- Footprint
- not in the notes
- Runtimes
- not in the notes
Where this comes from
Deployment tiers and runtimes as named in the notes. Footprint is the notes' figure, not a measurement by AURION.
Indonesia
- Indonesian support
- not stated
- Regional languages
- not in the notes
- Jakarta hosting
- unknown
- Languages
- not in the notes
Where this comes from
Indonesia fields are carried on every model; unknown is an allowed value.
Industry Use Cases
No industry use case links this model.
Links
DeveloperAnysphere (Cursor)startup, USA
Anysphere (Cursor)startup, USAModelComposer 2Anysphere (Cursor), code
Composer 2Anysphere (Cursor), codeUse Casesnone recorded
Who Runs Itnone recorded
Organisations 1
Sources
- Introducing Composer 2 , Cursor cursor.com https://cursor.com/blog/composer-2
To cite this page: Project AURION, AI Use-Cases Research & Innovation, "Composer 2", https://aurion.semai.id/models/anysphere-composer-2/, records of October 2026.