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What is SWE-1.7?

SWE-1.7 is a frontier software engineering model from Cognition built for advanced coding agents and long-horizon development workflows. It is designed to deliver strong coding intelligence at a fraction of the cost of some leading frontier alternatives, improving the cost-performance balance for real software engineering work. The model is trained from a Kimi K2.7 base and further improved through Cognition’s reinforcement learning pipeline, showing that additional post-training can still produce major capability gains. SWE-1.7 is optimized for tasks such as bug fixing, feature implementation, code migrations, terminal-based workflows, multilingual software engineering, large codebase navigation, and end-to-end validation. It performs especially well on longer asynchronous tasks where an AI agent needs to gather context, inspect files, test hypotheses, make changes, and verify results over an extended period. Cognition trained the model with infrastructure improvements that preserve entropy, stabilize training, support multi-cluster reinforcement learning, and improve fault tolerance across large distributed runs. The training process also focused heavily on data quality, using automated execution tests, verifier quality checks, reward-hacking prevention, and task filtering to create stronger learning signals. SWE-1.7 includes self-compaction, allowing it to summarize its working state and continue long projects even when tasks exceed the raw context window. It also uses an alternating length penalty to encourage concise reasoning on easier tasks while maintaining deeper exploration when a problem requires it. In practice, the model tends to explore codebases carefully, read relevant files, search for hidden requirements, test edge cases, and experiment before deciding how to implement a fix. Available in Devin across web, desktop, and CLI via Cerebras, SWE-1.7 gives engineering teams a powerful model for running scalable, cost-efficient coding agents.

What is Composer 1.5?

Composer 1.5 stands as the latest coding model from Cursor, designed to significantly boost both speed and analytical capabilities for routine programming tasks, boasting an impressive 20-fold enhancement in reinforcement learning compared to its predecessor, which results in superior performance when addressing real-world coding challenges. This innovative model operates as a "thinking model," producing internal reasoning tokens that aid in evaluating a user's codebase and planning future actions, which allows it to respond quickly to simple problems while engaging in deeper reasoning for more complex issues. Furthermore, it ensures interactivity and efficiency, making it perfectly suited for everyday development workflows. To manage lengthy tasks, Composer 1.5 incorporates a self-summarization feature that enables the model to distill information and maintain context when it reaches certain limits, thereby ensuring accuracy across various input lengths. Internal assessments reveal that Composer 1.5 surpasses its earlier version in coding tasks, particularly shining in its ability to handle intricate challenges, which enhances its applicability for interactive solutions within Cursor's platform. Not only does this advancement represent a leap forward in coding assistance technology, but it also promises to significantly enhance the overall development experience for users, making it a vital tool for modern programmers.

Media

Media

Integrations Supported

C#
C++
CSS
Cerebras
Cursor
Dart
Devin
JavaScript
Kotlin
Kubernetes
Lua
PHP
PowerShell
R
Rust
SQL
Swift
TypeScript
XML
YAML

Integrations Supported

C#
C++
CSS
Cerebras
Cursor
Dart
Devin
JavaScript
Kotlin
Kubernetes
Lua
PHP
PowerShell
R
Rust
SQL
Swift
TypeScript
XML
YAML

API Availability

Has API

API Availability

Has API

Pricing Information

$20/month
Free Version
Free Trial Offered?

Pricing Information

Pricing not provided
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Cognition

Date Founded

2023

Company Location

United States

Company Website

cognition.com

Company Facts

Organization Name

Cursor

Date Founded

2023

Company Location

United States

Company Website

cursor.com/blog/composer-1-5

Categories and Features

Categories and Features

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