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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 Ejentum?

Ejentum acts as a systematic reasoning framework designed specifically for agentic AI, improving the trustworthiness, traceability, and consistency of LLM agents when handling complex or lengthy assignments. This groundbreaking tool can be activated by agents during ongoing tasks, allowing for accurate cognitive processes tailored to their unique challenges, which provides opportunities for immediate adjustments in reasoning rather than relying solely on fixed prompts. Created to prevent AI agents from wandering off track, flattering users, creating falsehoods, or clinging to erroneous assumptions, Ejentum also guarantees that they do not accept shallow answers or lose crucial context through successive interactions. The framework features an impressive 679 capabilities categorized into four cognitive harnesses: reasoning, code, anti-deception, and memory. The reasoning harness specifically focuses analytical capabilities on comprehending causality, temporal aspects, spatial relationships, simulations, abstractions, and metacognition, thereby helping agents avoid superficial pattern recognition. Through the integration of these varied functionalities, Ejentum empowers AI to engage more profoundly with tasks, leading to improvements in the overall quality and depth of their outputs. Moreover, this structured approach not only enhances operational effectiveness but also fosters a more profound understanding of intricate problem-solving scenarios.

Media

Media

Integrations Supported

Devin Desktop
Cerebras
Dart
Kotlin
Kubernetes
Python
Ruby
Scala
Swift
XML
YAML

Integrations Supported

Devin Desktop
Cohere
Inception Labs
Mastra AI
Microsoft Azure
Mistral AI
OpenAI
Perplexity
PydanticAI
n8n

API Availability

API Availability

Has API

Pricing Information

$20/month
Free Version

Pricing Information

€25 per month
Free Version
Free Trial Offered?

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

Ejentum

Company Location

United States

Company Website

ejentum.com

Categories and Features

AI Coding Models

Not specified

AI Models

Not specified

Categories and Features

Agentic AI

Not specified

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