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Claude 1 vs Composer 2.5

Anthropic Claude 1 vs Cursor Composer 2.5 — side-by-side specs.

Anthropic
Claude 1
Cursor
Composer 2.5
Overview
CompanyAnthropicCursor
Release dateMar 14 2023May 18 2026
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Multilingual coding
SWE-Bench Multilingual
79.8%
Agentic coding
CursorBench v3.1
63.2%
Agentic terminal coding
Terminal-Bench 2.0
69.3%
Timeline
Release gapClaude 1 shipped 1161 days before Composer 2.5

Which is better: Claude 1 or Composer 2.5?

Claude 1 and Composer 2.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 1 shipped 1161 days before Composer 2.5, 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 1 and Composer 2.5 don't publish scores on any of the same benchmarks.

Frequently asked questions

When was Claude 1 released?
Claude 1 was released by Anthropic on Mar 14 2023.
When was Composer 2.5 released?
Composer 2.5 was released by Cursor on May 18 2026.

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