# Composer 2

Composer 2 is an AI model released by Cursor (now part of SpaceXAI) on Mar 19 2026. Tracked results include 58% on Next.js Evals, 73.7% on SWE-Bench Multilingual and 61.7% on Terminal-Bench 2.0.

## Facts

| Field | Value |
| --- | --- |
| Model | Composer 2 |
| Developer | Cursor (now part of SpaceXAI) |
| Release date | Thursday, Mar 19 2026 |
| Licensing | Closed |

## Tracked benchmark scores

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| SWE-Bench Multilingual | 73.7% | Lab | Like SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. |
| Next.js Evals | 58% | [Next.js Evals](https://nextjs.org/evals) | Vercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. |
| Terminal-Bench 2.0 | 61.7% | Lab | Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? (Version 2.0 of the test.) Higher is better. |

## Questions and answers

### When was Composer 2 released?

Composer 2 was released by Cursor (now part of SpaceXAI) on Thursday, Mar 19 2026.

### Who made Composer 2?

Composer 2 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.

### What benchmark scores did Composer 2 get?

Composer 2 reports 3 tracked benchmark scores — SWE-Bench Multilingual: 73.7%; Next.js Evals: 58%; Terminal-Bench 2.0: 61.7%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

### Is Composer 2 open source?

No. Composer 2 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 2?

SpaceXAI's previous tracked release was Grok 4.20 Beta on Feb 17 2026, 30 days earlier. It was followed by Grok 4.3 Beta on Apr 17 2026.


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Canonical page: https://aireleasetracker.com/model/xai/composer-2
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.