SWE-1.6 vs. Span-01 Comparison


SWE-1.6 Cognition	Span-01 Respan	+	+
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About SWE-1.6 is an engineering–focused AI model developed by Cognition and integrated into the Devin (Windsurf) environment, designed to optimize both raw intelligence and what the company calls “model UX,” or the overall feel and efficiency of interacting with an AI agent. It represents a new iteration in the SWE model family, improving performance on benchmarks such as SWE-Bench Pro by over 10% compared to SWE-1.5 while maintaining similar underlying capabilities. It was trained from scratch to jointly improve reasoning quality and user experience, addressing issues observed in earlier versions such as overthinking simple problems, taking too many steps, looping in repetitive reasoning, and relying excessively on terminal commands instead of specialized tools. SWE-1.6 introduces behavioral improvements such as more frequent parallel tool usage, faster context retrieval, and reduced need for user input, resulting in smoother and more efficient workflows.	About Span-01 is a hyper-parallel reasoning classifier built to detect complex behaviors across long production traces in a single forward pass. Rather than generating tokens sequentially, it reasons over natural-language behavior definitions and returns direct probabilities for present, absent, and not_observable. The model is trained for general classification reasoning with RLAIF before being specialized for behavior detection, allowing it to apply previously unseen definitions to new behaviors and domains instead of relying on a fixed taxonomy. At inference time, hyper-parallel definition branches evaluate multiple behaviors against the same trace context simultaneously, while hybrid attention helps preserve reasoning over long, complex inputs. Span-01 is designed for production monitoring across safety, reliability, grounding, agent behavior, and response quality, including jailbreak and prompt injection detection, privacy, and secrets.
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 Software engineers and developers who use AI agents to write, debug, and manage code efficiently with improved speed, usability, and workflow experience	Audience AI, safety, evaluation, and observability teams seeking to detect and score complex behaviors across long production traces with fast, probability-based classification
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 Not Supported	API Offers API Supported
Screenshots and Videos View more images or videos	Screenshots and Videos View more images or videos
Pricing No information available. Free Version Not Supported Free Trial Supported	Pricing $199 per month Free Version Supported Free Trial Supported
Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software	Reviews/Ratings Overall 0.0 / 5 ease 0.0 / 5 features 0.0 / 5 design 0.0 / 5 support 0.0 / 5 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software

Training Documentation Supported Webinars Not Supported Live Online Not Supported In Person Not Supported	Training Documentation Supported Webinars Not Supported Live Online Supported In Person Not Supported
Company Information Cognition Founded: 2023 United States cognition.com	Company Information Respan Founded: 2023 United States www.respan.ai/blog/introducing-span-1
Alternatives GPT-5.6 Sol OpenAI	Alternatives Clef-flash Cloudflare
Claude Mythos 5 Anthropic	Clef Cloudflare
Claude Sonnet 5 Anthropic	Jev TypeSafe AI
SWE-2 Cognition	Tev1 Together AI
GLM-4.7 Z.ai View All	Microsoft-Decision-1 Microsoft View All
Categories AI Coding Models Supported AI Models Supported	Categories AI Decision Models Supported

Integrations AssemblyAI Not Supported Cognee Not Supported Devin Supported Devin Desktop Supported Google GenAI SDK Not Supported JavaScript Not Supported LangChain Not Supported LinkUp Not Supported LlamaIndex Not Supported Mastra AI Not Supported Mem0 Not Supported OpenAI Not Supported OpenAI Agents API Not Supported PostHog Not Supported Python Not Supported TypeScript Not Supported Vercel Not Supported Show More Integrations View All 2 Integrations	Integrations AssemblyAI Supported Cognee Supported Devin Not Supported Devin Desktop Not Supported Google GenAI SDK Supported JavaScript Supported LangChain Supported LinkUp Supported LlamaIndex Supported Mastra AI Supported Mem0 Supported OpenAI Supported OpenAI Agents API Supported PostHog Supported Python Supported TypeScript Supported Vercel Supported Show More Integrations View All 15 Integrations
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