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Composer 1.5 vs Grok‑1

Cursor Composer 1.5 vs xAI Grok‑1 — side-by-side specs.

Cursor
Composer 1.5
xAI
Grok‑1
Overview
CompanyCursorxAI
Release dateFeb 8 2026Nov 3 2023
Model type
Open sourceNoYes
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapGrok‑1 shipped 828 days before Composer 1.5

Which is better: Composer 1.5 or Grok‑1?

Composer 1.5 and Grok‑1 do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Grok‑1 shipped 828 days before Composer 1.5, so benchmark comparisons should account for the intervening progress.

Grok‑1 is an open-source / open-weight model; Composer 1.5 is proprietary.

Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Composer 1.5 released?
Composer 1.5 was released by Cursor on Feb 8 2026.
When was Grok‑1 released?
Grok‑1 was released by xAI on Nov 3 2023.
Is Composer 1.5 or Grok‑1 open source?
Grok‑1 is an open-source / open-weight model released by xAI. Composer 1.5 is a proprietary model released by Cursor.

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