Composer 1.5
No estimate
No hardware requirements for this model
The weights for this model have not been published, so it cannot be downloaded or run on your own hardware at any size. It is reachable only through its provider, and no graphics card changes that.
On record
Full specification
Everything on record for this model. Most of it describes how it was trained rather than how it runs — useful context for judging how much work went into it, and how it compares with models built at a different scale.
Origin
Who built this model, where, and when it was published.
- Organisation
- Cursor
- Organisation type
- Industry
- Country
- United States of America
- Published
- 9 February 2026
What it does
The problem areas the model was built for. A model can carry several of each.
- Domain
- Language
- Task
- Coding, Agentic tasks
Size
How large the model is and how much data it was trained on. Parameters are the figure that decides whether it fits on a given graphics card.
- Training data
- tokens
Availability
Whether you can obtain the model and run it on your own hardware, which is what decides if any of the graphics-card figures on this page apply.
- Weights
- Closed — provider access only
- Model access
- API access
How it is classified
Labels the source dataset applies when tracking notable models, and how confident it is in the entry.
- Record confidence
- Likely
Sources
Where this record came from and when it was last checked.
- Reference
- Introducing Composer 1.5
- Last updated
- 8 April 2026
What the numbers mean
Where it came from
Composer 1.5 was published by Cursor, in United States of America, in February 2026. The organisation is categorised as industry.
It works in Language, and is recorded as doing coding, Agentic tasks.
Its weights were never published, so it can only be reached through its provider. No graphics card changes that.
Answers
Composer 1.5 — common questions
How many parameters does Composer 1.5 have?
No parameter count has been published for Composer 1.5, which is why no memory or speed figure appears on this page.
Who created Composer 1.5?
Composer 1.5 was published by Cursor, based in United States of America, categorised as industry.
When was Composer 1.5 released?
Composer 1.5 was published in February 2026.
What is Composer 1.5 used for?
Composer 1.5 works in Language, and is recorded as handling coding, Agentic tasks. These are the areas it was designed around; they describe intent rather than a hard boundary.
What GPU do I need to run Composer 1.5?
None. Composer 1.5 is a closed model — its weights were never published, so it cannot be downloaded or run on your own hardware at any price. It is reachable only through its provider.
Is Composer 1.5 open source?
No. Composer 1.5 has not had its weights published, so it exists only as a service controlled by its owner.
The other direction
Looking at it from the other side?
This page starts from the model. If you already own a card and want to know everything it will run, start from the hardware instead.