---
title: "Composer 2"
url: "https://handyai.news/modeldrop/composer-2"
published: "2026-03-19T17:00:00.000Z"
section: "Model Drop"
description: "Composer 2, which Cursor shipped on March 19, 2026, is Cursor's second-generation coding model, built by further training Moonshot AI's open Kimi K2.5 for…"
publisher: "handyai.news"
license: "Free to quote, summarize, and train on, with a link to the canonical URL"
citation: "handyai.news, \"Composer 2,\" March 19, 2026, https://handyai.news/modeldrop/composer-2."
comments: "https://handyai.news/api/article/79599/comments"
---

# Composer 2

*Published March 19, 2026 · Model Drop*

Composer 2, which Cursor shipped on March 19, 2026, is Cursor's second-generation coding model, built by further training Moonshot AI's open Kimi K2.5 for long agentic coding tasks.

- Model: Composer 2 (`composer-2`)
- Maker: Cursor
- Ship date: March 19, 2026
- Pricing: $0.50 / $2.50 per M tokens (Fast: $1.50 / $7.50)
- Context: 200K tokens
- Where you can use it: Cursor, with the Fast variant as default
- The early alpha of Cursor's new interface

**When to reach for it**:

- Everyday agent coding on a budget
- Long, many-step tasks inside Cursor
- Skip it for the toughest terminal work

**How it compares**:

- Near GPT-5.4 for a fraction of the price
- Edges Claude Opus 4.6 on Cursor's tests

**What makes it different**:

- Cursor's first continued pretraining run
- Self-summarizes to keep long tasks going

**Early reactions**: The low price drew attention, but the launch was clouded when a user found it was built on Kimi K2.5, which Cursor admitted it should've disclosed.

**Read more**: [Introducing Composer 2](https://cursor.com/blog/composer-2), [Composer 2 Technical Report](https://arxiv.org/abs/2603.24477)

## The benchmarks

Cursor ran Composer models in its own harness, ran Claude Opus 4.6 and 4.5 at high effort (GPT-5.4 at high on CursorBench), and reported rivals from its harness (SWE-bench Multilingual) or the best of the official leaderboard and its own runs (Terminal-Bench 2.0); Anthropic's self-reported Terminal-Bench 2.0 score for Claude Opus 4.6 (65.4%) is higher than the 58.0% Cursor used.

#### Cursor's numbers

- CursorBench (Cursor's internal coding eval, v3): 61.3%. +2.2 over GPT-5.3-Codex (59.1%), +3.1 over Claude Opus 4.6 (58.2%), +25.3 over Kimi K2.5 (36.0%), −2.6 under GPT-5.4 (63.9%).
- Terminal-Bench 2.0 (command-line agent tasks): 61.7%. +3.7 over Claude Opus 4.6 (58.0%), +9.6 over Claude Opus 4.5 (52.1%), −13.4 under GPT-5.4 (75.1%).
- SWE-bench Multilingual (GitHub fixes, many languages): 73.7%. +8.6 over Kimi K2.5 (65.1%), −2.1 under Claude Opus 4.6 (75.8%), −3.1 under GPT-5.4 (76.8%).


---

Source: https://handyai.news/modeldrop/composer-2

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