SpecificationChatGPTMicrosoft Copilot
Starting PriceFree $0/month · Plus from $20/monthFree $0/month · Microsoft 365 Personal from $9.99/month
AI ModelsGPT-5.6 Luna / GPT-5.6 Sol / GPT-5.6 Sol Pro / GPT-6 Pro (plan-dependent)Microsoft Copilot uses OpenAI GPT-5.x family in Microsoft 365 Copilot; exact model varies by mode and rollout
Context WindowUp to 256K total context in supported Thinking configurations; varies by model/modeNot disclosed as a single consumer-app context window; depends on Copilot experience and underlying model
Advanced ReasoningSelectable reasoning levels on eligible paid plans; higher tiers provide access to more capable reasoning configurationsAdvanced Copilot chat with reasoning and agentic workflows; higher usage on paid plans
Web SearchChatGPT Search searches the live web and returns answers with inline citations and source linksWeb-grounded Copilot answers and cited online sources
Deep ResearchDeep Research performs multi-step web research, can use uploaded files and eligible connected sources, and produces cited reports; limits vary by planResearcher replaces retired Deep Research; multi-step cited reports on Microsoft 365 Premium/Pro and eligible business licenses
Image UnderstandingAnalyzes uploaded images, screenshots, diagrams and other supported visual inputs; availability depends on model and plan limitsUpload PNG/JPEG/PJP/JFIF images; Copilot Vision can interpret screen or camera during supported voice sessions
Image GenerationChatGPT Images supports native image generation and editing from text and image prompts; usage limits vary by planAI image creation from prompts; free capacity limits and higher allowances on paid Microsoft 365 tiers
Voice InputSpeech input supported through Voice; voice availability and limits vary by plan and platformMicrophone dictation and voice prompts on supported platforms
Voice ConversationsReal-time spoken conversations through ChatGPT Voice; available capabilities vary by plan, platform and selected voice experienceReal-time Copilot Voice; feature availability and plan restrictions vary between personal and work accounts
Video UnderstandingLimited / mode-dependentCopilot Vision offers live camera or screen understanding in eligible voice sessions; general video-file analysis limits not disclosed
Conversation MemoryCross-chat memory and personalization with user controls; availability and capabilities vary by plan and accountCopilot memory and personalization where available; previous chats accessible across supported experiences
File AnalysisPDF / DOCX / XLSX / CSV / PPTX / TXT and other supported formatsPDF, DOCX, XLSX, PPTX, PNG, JPEG, TXT, JSON, CSV, MD and others; up to 20 files per conversation, 50 MB each
IntegrationsSupports connected apps and services such as Google Workspace, Microsoft services, Slack, GitHub and other available integrations; availability variesWord / Excel / PowerPoint / Outlook / Teams / OneDrive / SharePoint / Edge and eligible connectors
