SWE-2

SWE-2

Cognition
5.0 out of 5 stars
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About

Claude Mythos 5.2 is an advanced AI reasoning model developed by Anthropic for cybersecurity research, biomedical science, autonomous software engineering, and complex technical problem-solving. The model shares its underlying architecture with Claude Fable 5.2 but provides verified organizations with access to specialized cybersecurity and biological research capabilities that are restricted in the general-purpose version. Its capabilities include vulnerability discovery, secure code analysis, scientific research, protein design, technical investigations, and autonomous agent workflows. Claude Mythos 5.2 demonstrates improved vulnerability identification and scientific reasoning, achieving 76.3% on CyScenarioBench and 89.6% on Anthropic's CVE Rediscovery evaluation. The model generates output up to 30% faster than its predecessor and offers an optional fast mode that increases token generation speed by up to 2.5 times.

About

SWE-2 is Cognition’s advanced coding model designed to improve software engineering performance while reducing the cost of agentic coding workflows. The model is post-trained from Kimi K3 and uses reinforcement learning to optimize multiple reasoning-effort levels within a single training run. SWE-2 is designed to explore codebases more selectively, begin implementation sooner, and complete tasks with fewer redundant reads and reasoning steps than earlier Cognition models. Its capabilities include code generation, debugging, test creation, verification, repository analysis, and complex terminal-based software engineering tasks. The model also emphasizes stronger engineering judgment, end-to-end test coverage, instruction following, and evidence-based verification of user assumptions. SWE-2 is available through Devin Desktop and Devin CLI, with broader rollout planned across Devin Web and Fusion.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Verified cybersecurity researchers, penetration testing teams, vulnerability researchers, application security engineers, security research laboratories, biomedical scientists, computational biologists, pharmaceutical researchers, protein engineers, AI researchers, software engineers, and approved organizations seeking advanced cybersecurity analysis, vulnerability discovery, biological research, scientific reasoning, and autonomous technical research capabilities

Audience

Software developers, engineering teams, AI coding agent users, DevOps professionals, and organizations that need capable agentic software engineering with lower execution cost and more efficient reasoning

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$8 per 1M tokens (input)
$8 per million input tokens and $40 per million output tokens
Free Version Not Supported
Free Trial Not Supported

Pricing

$20/month
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

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Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5

Pros & Cons from Real Users

Pros

  • The biggest thing that stands out is the cost-performance balance. SWE-2 is not just trying to top one benchmark; it is trying to get very close to frontier coding performance at a much lower cost. For developers, that matters a lot. Coding agents can burn through tokens quickly when they are reading files, making edits, running tests, and iterating. A model that performs near the top while being meaningfully cheaper is much easier to use every day. I also like that SWE-2 seems built for real software engineering workflows, not just isolated code snippets. The strong DeepSWE and Terminal-Bench results make it especially interesting for repo-level tasks, debugging, tool use, and longer agent runs.

Cons

  • Benchmarks are useful, but real projects bring messy architecture, flaky tests, undocumented behavior, and weird edge cases.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Anthropic
Founded: 2021
United States
claude.ai

Company Information

Cognition
Founded: 2023
United States
cognition.com

Alternatives

Claude Fable 5.2

Claude Fable 5.2

Anthropic
5.0 out of 5 stars

Alternatives

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GPT-6.1 Terra

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GPT-6.1 Sol

GPT-6.1 Sol

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SWE-1.7

SWE-1.7

Cognition
5.0 out of 5 stars
Claude Mythos 5

Claude Mythos 5

Anthropic
5.0 out of 5 stars
SWE-2 Flash

SWE-2 Flash

Cognition
5.0 out of 5 stars

Categories

AI Coding Models Supported
AI Models Supported
AI Vision Models Supported
Foundation Models Supported
Multimodal Models Supported

Categories

AI Coding Models Supported
AI Models Supported

Integrations

.NET Supported
C# Supported
C++ Supported
CSS Supported
Go Supported
HTML Supported
JavaScript Supported
Kotlin Supported
Kubernetes Supported
Objective-C Supported
PHP Supported
PowerShell Supported
Python Supported
R Supported
SQL Supported
Scala Supported
Solidity Supported
TypeScript Supported
XML Supported
YAML Supported

Integrations

.NET Supported
C# Supported
C++ Supported
CSS Supported
Go Supported
HTML Supported
JavaScript Supported
Kotlin Supported
Kubernetes Supported
Objective-C Supported
PHP Supported
PowerShell Supported
Python Supported
R Supported
SQL Supported
Scala Supported
Solidity Supported
TypeScript Supported
XML Supported
YAML Supported
Claim Claude Mythos 5.2 and update features and information
Claim Claude Mythos 5.2 and update features and information
Claim SWE-2 and update features and information
Claim SWE-2 and update features and information