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Claude 2.1 vs Composer 2

Anthropic Claude 2.1 vs Cursor Composer 2 — side-by-side specs.

Anthropic
Claude 2.1
Cursor
Composer 2
Overview
CompanyAnthropicCursor
Release dateNov 21 2023Mar 20 2026
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Multilingual coding
SWE-Bench Multilingual
73.7%
Agentic coding
CursorBench v3.1
52.2%
Agentic terminal coding
Terminal-Bench 2.0
61.7%
Timeline
Release gapClaude 2.1 shipped 850 days before Composer 2

Which is better: Claude 2.1 or Composer 2?

Claude 2.1 and Composer 2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 2.1 shipped 850 days before Composer 2, so benchmark comparisons should account for the intervening progress.

Published specifications for these two models are limited — see each model page for the latest details.

Direct benchmark comparisons are unavailable — Claude 2.1 and Composer 2 don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Claude 2.1 released?
Claude 2.1 was released by Anthropic on Nov 21 2023.
When was Composer 2 released?
Composer 2 was released by Cursor on Mar 20 2026.

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