SpecificationMicrosoft CopilotChatGPT
Starting PriceFree $0/month · Microsoft 365 Personal from $9.99/monthFree $0/month · Plus from $20/month
AI ModelsMicrosoft Copilot uses OpenAI GPT-5.x family in Microsoft 365 Copilot; exact model varies by mode and rolloutGPT-5.6 Luna / GPT-5.6 Sol / GPT-5.6 Sol Pro / GPT-6 Pro (plan-dependent)
Context WindowNot disclosed as a single consumer-app context window; depends on Copilot experience and underlying modelUp to 256K total context in supported Thinking configurations; varies by model/mode
Advanced ReasoningAdvanced Copilot chat with reasoning and agentic workflows; higher usage on paid plansSelectable reasoning levels on eligible paid plans; higher tiers provide access to more capable reasoning configurations
Web SearchWeb-grounded Copilot answers and cited online sourcesChatGPT Search searches the live web and returns answers with inline citations and source links
Deep ResearchResearcher replaces retired Deep Research; multi-step cited reports on Microsoft 365 Premium/Pro and eligible business licensesDeep Research performs multi-step web research, can use uploaded files and eligible connected sources, and produces cited reports; limits vary by plan
Image UnderstandingUpload PNG/JPEG/PJP/JFIF images; Copilot Vision can interpret screen or camera during supported voice sessionsAnalyzes uploaded images, screenshots, diagrams and other supported visual inputs; availability depends on model and plan limits
Image GenerationAI image creation from prompts; free capacity limits and higher allowances on paid Microsoft 365 tiersChatGPT Images supports native image generation and editing from text and image prompts; usage limits vary by plan
Voice InputMicrophone dictation and voice prompts on supported platformsSpeech input supported through Voice; voice availability and limits vary by plan and platform
Voice ConversationsReal-time Copilot Voice; feature availability and plan restrictions vary between personal and work accountsReal-time spoken conversations through ChatGPT Voice; available capabilities vary by plan, platform and selected voice experience
Video UnderstandingCopilot Vision offers live camera or screen understanding in eligible voice sessions; general video-file analysis limits not disclosedLimited / mode-dependent
Conversation MemoryCopilot memory and personalization where available; previous chats accessible across supported experiencesCross-chat memory and personalization with user controls; availability and capabilities vary by plan and account
File AnalysisPDF, DOCX, XLSX, PPTX, PNG, JPEG, TXT, JSON, CSV, MD and others; up to 20 files per conversation, 50 MB eachPDF / DOCX / XLSX / CSV / PPTX / TXT and other supported formats
IntegrationsWord / Excel / PowerPoint / Outlook / Teams / OneDrive / SharePoint / Edge and eligible connectorsSupports connected apps and services such as Google Workspace, Microsoft services, Slack, GitHub and other available integrations; availability varies
