GPT‑6 Cyber vs. Muse Spark Open Comparison


GPT‑6 Cyber OpenAI	Muse Spark Open Meta	+	+
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About GPT-6 Cyber is an advanced AI cybersecurity model developed by OpenAI to help security researchers discover, validate, and remediate software vulnerabilities. The model specializes in autonomous vulnerability research, exploit development, secure code analysis, and authorized penetration testing across complex software environments. Its reasoning capabilities allow security teams to investigate large codebases, identify previously unknown vulnerabilities, reproduce security flaws, and develop candidate patches. GPT-6 Cyber achieved a 48.5% success rate on ExploitGym, representing a 51% relative improvement over GPT-5.6 Cyber. The model includes specialized alignment training and safeguards designed to respect authorized testing boundaries, prevent unauthorized actions, and accurately report research findings. GPT-6 Cyber is initially available through OpenAI's Daybreak Red program using the API and Codex for approved cybersecurity organizations and researchers.	About Muse Spark Open is an open-weight, natively multimodal language model for developers and organizations building AI applications, coding systems, and agentic workflows. The released model has 816 billion total parameters, 42 billion active parameters, and a 1-million-token context window. Teams can download the model weights, run inference through supported engines such as vLLM, SGLang, TensorRT-LLM, Hugging Face Transformers, Apple MLX, llama.cpp, or Unsloth, and customize the model using PyTorch. It supports long-context reasoning, software engineering, coding, tool use, and multimodal inputs. Deployment options include cloud inference through listed API providers or self-hosting on compatible GPU systems; Meta documents a desktop setup using two Apple M5 Ultra Mac Studio computers. The model is released under the Muse Model License with limited commercial terms.
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 Supported Mac Supported Linux Supported Cloud Supported On-Premises Supported iPhone Not Supported iPad Not Supported Android Not Supported Chromebook Not Supported
Audience Cybersecurity researchers, penetration testers, ethical hackers, red teams, vulnerability researchers, application security engineers, security operations teams, software security auditors, incident response professionals, open-source maintainers, critical infrastructure security specialists, and organizations seeking AI-powered vulnerability discovery, authorized exploit development, security testing, secure code review, and automated vulnerability remediation	Audience AI developers, machine learning engineers, software engineers, AI researchers, enterprise development teams, and organizations seeking customizable open-weight multimodal models for local inference, autonomous agents, complex coding, and long-context AI applications
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 Not Supported
API Offers API Supported	API Offers API Not 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 Not Supported	Pricing $0 Model weights are available at no charge under the Muse Model License, which has limited commercial-use terms. Hosted inference providers set their own usage prices. 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 This software hasn't been reviewed yet. Be the first to provide a review: Review this Software	Reviews/Ratings Overall 5.0 / 5 ease 5.0 / 5 Read all reviews
	Pros & Cons from Real Users Pros Meta finally opened up a genuinely frontier-level Muse model. The 1M-token context window and 42B active parameters make it strong enough for large repos, long agent sessions, multimodal work, and complex coding without feeling like a stripped-down open model. The local deployment story is also a huge deal. Being able to run something this capable on two M5 Ultra Mac Studios is impressive, especially for teams that want more control over data, infrastructure, and customization. I also like how much of the stack is open around it. Muse Spark Open works with MLX, vLLM, SGLang, TensorRT-LLM, Transformers, llama.cpp, and Unsloth, and Meta is making the weights available through Hugging Face, SageMaker, Google Cloud Model Garden, and Microsoft Foundry. Cons Even though it is technically desktop-capable, needing two M5 Ultra Mac Studios for the full local experience is still a serious setup, so most developers will probably use hosted inference instead.
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 OpenAI Founded: 2015 United States openai.com	Company Information Meta Founded: 2004 United States research.meta.ai/blog/muse-spark-open
Alternatives Gemini 4 Carbon Google	Alternatives Gemini 4 Carbon Google
GPT-6.1 Terra OpenAI	GPT-6.1 Terra OpenAI
GPT-6.1 Sol OpenAI	GPT-6.1 Sol OpenAI
Gemini 3.5 Flash Cyber Google	Inkling Thinking Machines Lab
Gemini 3.8 Flash Cyber Google View All	Muse Glimmer Meta View All
Categories AI Coding Models Supported AI Models Supported AI Reasoning Models Supported AI Vision Models Supported Foundation Models Supported Large Language Models Supported Multimodal Models Supported	Categories AI Coding Models Supported AI Models Supported AI Reasoning Models Supported AI Receptionists Supported Foundation Models Supported Large Language Models Supported Multimodal Models Supported Open-Weight AI Models Supported

Integrations OpenRouter Supported AiAssistWorks Supported Auggie CLI Supported Brokk Supported ChatGPT Enterprise Supported Codex Security Supported GPT-5.1-Codex-Max Supported GitHub Copilot Supported Go Supported JetBrains Junie Supported Kotlin Supported LaunchLemonade Supported Lovable Supported Nebius Not Supported Oh My OpenAgent Supported PrivatClaw Supported Ruby Supported TranslateAI Supported Vercel AI Gateway Supported vLLM Not Supported Show More Integrations View All 129 Integrations	Integrations OpenRouter Supported AiAssistWorks Not Supported Auggie CLI Not Supported Brokk Not Supported ChatGPT Enterprise Not Supported Codex Security Not Supported GPT-5.1-Codex-Max Not Supported GitHub Copilot Not Supported Go Not Supported JetBrains Junie Not Supported Kotlin Not Supported LaunchLemonade Not Supported Lovable Not Supported Nebius Supported Oh My OpenAgent Not Supported PrivatClaw Not Supported Ruby Not Supported TranslateAI Not Supported Vercel AI Gateway Not Supported vLLM Supported Show More Integrations View All 9 Integrations
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