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%. Scores are the figures published at release by Cursor (now part of SpaceXAI).

Is Composer 2 open source?

No. Composer 2 is a proprietary 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.

Composer 2

Released Mar 19 2026

Composer 2 is an AI model released by Cursor (now part of SpaceXAI) on Thursday, Mar 19 2026, 30 days after Grok 4.20 Beta. Benchmark results (shown below) cover SWE-Bench Multilingual, Next.js Evals, and Terminal-Bench 2.0.

Benchmarks

Coding

SWE-Bench Multilingual

73.7%

#10 of 14

Next.js Evals

58%

#19 of 28

Terminal & CLI

Terminal-Bench 2.0

61.7%

#9 of 14

Compare Composer 2 with

Composer 2

Suggested comparisons

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Frequently asked questions

: Composer 2 was released by Cursor (now part of SpaceXAI) on Thursday, Mar 19 2026.
: 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.
: Composer 2 reports 3 tracked benchmark scores — SWE-Bench Multilingual: 73.7%; Next.js Evals: 58%; Terminal-Bench 2.0: 61.7%. Scores are the figures published at release by Cursor (now part of SpaceXAI).
: No. Composer 2 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
: 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.