# Composer

Composer is an AI model released by Cursor (now part of SpaceXAI) on Oct 29 2025.

## Facts

| Field | Value |
| --- | --- |
| Model | Composer |
| Developer | Cursor (now part of SpaceXAI) |
| Release date | Wednesday, Oct 29 2025 |
| Licensing | Closed |

## Questions and answers

### When was Composer released?

Composer was released by Cursor (now part of SpaceXAI) on Wednesday, Oct 29 2025.

### Who made Composer?

Composer was built by Cursor (now part of SpaceXAI). Elon Musk's AI company building the Grok series of models. Founded in 2023 as xAI, now part of SpaceX. Cursor (Anysphere) and its Composer coding models were acquired in 2026 and are tracked here.

### Is Composer open source?

No. Composer is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

### What came before and after Composer?

SpaceXAI's previous tracked release was Grok 4 Fast on Sep 19 2025, 40 days earlier. It was followed by Grok 4.1 on Nov 17 2025.


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Canonical page: https://aireleasetracker.com/model/xai/composer
Site index: https://aireleasetracker.com/llms.txt
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.