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Claude 2.1 vs Composer 1.5

Anthropic Claude 2.1 vs Cursor Composer 1.5 — side-by-side specs.

Anthropic
Claude 2.1
Cursor
Composer 1.5
Overview
CompanyAnthropicCursor
Release dateNov 21 2023Feb 8 2026
Model type
Open sourceNoNo
Specifications
Parameters
Context window
Benchmarks
Science reasoning
GPQA Diamond
Software engineering
SWE-Bench Verified
Multimodal understanding
MMMU
Timeline
Release gapClaude 2.1 shipped 810 days before Composer 1.5

Which is better: Claude 2.1 or Composer 1.5?

Claude 2.1 and Composer 1.5 do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. Claude 2.1 shipped 810 days before Composer 1.5, 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 — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.

Frequently asked questions

When was Claude 2.1 released?
Claude 2.1 was released by Anthropic on Nov 21 2023.
When was Composer 1.5 released?
Composer 1.5 was released by Cursor on Feb 8 2026.

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