SpecificationMicrosoft CopilotPerplexity
Starting PriceFree $0/month · Microsoft 365 Personal from $9.99/monthFree $0/month · Pro from $20/month
AI ModelsMicrosoft Copilot uses OpenAI GPT-5.x family in Microsoft 365 Copilot; exact model varies by mode and rolloutMultiple frontier models from OpenAI, Anthropic, Google and others; catalog rotates
Context WindowNot disclosed as a single consumer-app context window; depends on Copilot experience and underlying modelNot disclosed as a single app-wide token limit; varies by model, search mode and plan
Advanced ReasoningAdvanced Copilot chat with reasoning and agentic workflows; higher usage on paid plansAdvanced reasoning models available on Pro/Max; higher limits on Max
Web SearchWeb-grounded Copilot answers and cited online sourcesBasic web search on Free; extended Pro Search on paid plans with citations
Deep ResearchResearcher replaces retired Deep Research; multi-step cited reports on Microsoft 365 Premium/Pro and eligible business licensesResearch performs multi-step investigations and cited reports; Free 1/month, higher paid allowances
Image UnderstandingUpload PNG/JPEG/PJP/JFIF images; Copilot Vision can interpret screen or camera during supported voice sessionsImage upload and analysis supported; attachment limits depend on plan
Image GenerationAI image creation from prompts; free capacity limits and higher allowances on paid Microsoft 365 tiersImage generation on Pro, Education Pro, Max and Enterprise; not included on Standard Free
Voice InputMicrophone dictation and voice prompts on supported platformsVoice-based query input in supported mobile experiences; availability varies by platform
Voice ConversationsReal-time Copilot Voice; feature availability and plan restrictions vary between personal and work accountsVoice assistant experiences available on supported Perplexity apps; availability and limits vary
Video UnderstandingCopilot Vision offers live camera or screen understanding in eligible voice sessions; general video-file analysis limits not disclosedVideo upload/analysis availability depends on current app and plan; exact general limits not disclosed
Conversation MemoryCopilot memory and personalization where available; previous chats accessible across supported experiencesPersonalization and memory vary by plan; Max Brain preview builds project/file context in Perplexity Computer
File AnalysisPDF, DOCX, XLSX, PPTX, PNG, JPEG, TXT, JSON, CSV, MD and others; up to 20 files per conversation, 50 MB eachFile upload and analysis; limited on Free; Pro supports up to 50 files per project; higher Enterprise allowances
IntegrationsWord / Excel / PowerPoint / Outlook / Teams / OneDrive / SharePoint / Edge and eligible connectorsConnected app sources and file connectors; Enterprise centrally governs internal knowledge access
