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What is SWE-2?

SWE-2 is Cognition’s coding model for software engineering agents, developed to improve the balance between capability, reasoning cost, and execution efficiency. The model is post-trained from Kimi K3, a multi-trillion-parameter model that had already received extensive reinforcement learning for agentic coding. Cognition further trained SWE-2 with a reinforcement learning algorithm that optimizes several reasoning-effort levels during a single training run. These effort levels let users trade off speed and cost against deeper planning, codebase exploration, and verification for more difficult assignments. SWE-2 is designed to reduce the over-exploration seen in earlier models by identifying relevant files and implementation paths more quickly. Its software engineering abilities include repository analysis, code writing and editing, debugging, testing, build and lint workflows, terminal tasks, and verification of completed work. The model places additional emphasis on writing end-to-end tests, catching edge cases and regressions, and gathering evidence instead of simply accepting assumptions in a prompt. Cognition’s training approach also uses cost penalties tied to the model’s performance frontier, length-weighted reward baselines, speculative decoding improvements, low-precision inference techniques, and expanded reinforcement learning data. Training data includes more diverse repositories, additional instruction-following requirements, and iterative verifier improvements designed to reduce reward hacking and false validation. SWE-2 is benchmarked against models such as GPT-6 Astra, GPT-5.6 Sol, Fable 5.1, Grok 4.6, and Kimi K3, with Cognition positioning it around strong coding performance at substantially lower cost. SWE-2 is intended for use across Cognition’s Devin ecosystem, including Desktop and CLI, with rollout to Devin Web and Fusion.

What is Kimi?

Kimi serves as an exceptionally skilled assistant, boasting a remarkable "memory" that enables her to simultaneously read extensive novels of up to 200,000 words while browsing the web. Her ability to grasp and analyze lengthy documents proves invaluable for swiftly summarizing reports like financial analyses and research findings, which enhances both your reading efficiency and organizational tasks. When preparing for exams or exploring unfamiliar topics, Kimi adeptly summarizes and clarifies intricate details from textbooks or academic articles, making learning more accessible. For those involved in programming or technical endeavors, Kimi is ready to assist by reproducing code or proposing technical solutions based on your provided snippets or pseudocode. Fluent in Chinese and adept at handling multilingual content, Kimi greatly improves communication and comprehension in international environments, establishing her as a versatile asset for global collaboration. Beyond her practical applications, Kimi Chat can engage users in lively conversations or even take on the persona of beloved game characters, adding an entertaining dimension to the experience. This blend of productivity help and interactive enjoyment not only aids in completing tasks but also infuses a sense of fun into your everyday activities, making Kimi an indispensable part of your routine.

Media

Media

Integrations Supported

C
C++
CSS
Dart
Rust
Solidity
TypeScript

Integrations Supported

AnyAPI
BrainyAI
Filamental
Kimi K2.5
Kimi K3
Kimi Work
LaReview
MachinesFluent
Nebius Token Factory
OpenClaw
Peezy Gateway
Vity
omp

API Availability

API Availability

Has API

Pricing Information

$20/month
Free Version

Pricing Information

Free
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

Cognition

Date Founded

2023

Company Location

United States

Company Website

cognition.com

Company Facts

Organization Name

Moonshot AI

Date Founded

2023

Company Location

China

Company Website

www.kimi.com

Categories and Features

AI Coding Models

Not specified

AI Models

Not specified

Categories and Features

AI Assistants

Not specified

AI Chatbots

Not specified

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