Microsoft Copilot vs Upstage Solar (솔라) comparison

Microsoft Copilot and Upstage Solar (솔라) compared side by side in AI.

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Microsoft Copilot

Microsoft's AI assistant built into Windows, Edge and Office

What is good

  • Works directly with Windows, Word and Excel
  • Latest-level models available for free

What could be better

  • Office integration features need a Microsoft 365 subscription
  • Weak personality as a standalone chatbot

Microsoft Copilot official site

Upstage Solar (솔라)

An agent-oriented LLM API from Upstage that is strong in Korean. Solar Pro 4 launched in August 2026, and Solar Mini 4 and the decision-only Solar Decide (beta) in September

What is good

  • Official support for Korean, English and Japanese
  • 512K long context, up to 128K output
  • API input is not used for training and on-premises deployment is possible

What could be better

  • No chat app for general users (API only)
  • Parameter count not disclosed

Upstage Solar (솔라) official site

At a glance

Highlighted rows are where they differ.

ItemMicrosoft CopilotVisit siteUpstage Solar (솔라)Visit site
Starting price≈₩13,265+ ($9.99)Official USD priceCheck siteNot applicable
Free tierFree plan availablePaid only
Korean supportGoodGood
Main models
  • OpenAI GPT-5 family (Smart/Think Deeper)
  • GPT-5.5/Claude selectable for business
  • MAI in-house models (image/voice)
  • Solar Pro 4 (flagship)
  • Solar Mini 4 (lightweight)
  • Solar Decide (decision model, beta)
  • Document Parse
  • Embed 2 (Solar Pro 3/Pro 2/Mini end on 2026-10-30)
TypeAI servicesAI services
CategoryChatbot/Assistant, Writing/ProductivityDeveloper API
CompanyMicrosoft, United StatesUpstage (업스테이지), South Korea
Plans
  • Free
  • M365 Personal $9.99
  • Family $12.99
  • Premium $19.99
  • Pro $99.99
  • For business: Copilot Business $21 (annual), Enterprise $30 (annual)
  • API pay-as-you-go (per 1 million tokens, excl. VAT): Solar Pro 4 list price input $0.30
  • output $1.20 (promotion $0.15/$0.60 from October 20), Solar Mini 4 list price input $0.10
  • output $0.40 (50% off until October 22), Solar Decide (beta) input $0.10, output free
  • Prepaid credits, commitment plan ($100+/mo), Enterprise by inquiry
Pros
  • Works directly with Windows, Word and Excel
  • Latest-level models available for free
  • Official support for Korean, English and Japanese
  • 512K long context, up to 128K output
  • API input is not used for training and on-premises deployment is possible
  • Enterprise tools such as document parsing and OCR in one place
Cons
  • Office integration features need a Microsoft 365 subscription
  • Weak personality as a standalone chatbot
  • No chat app for general users (API only)
  • Parameter count not disclosed
  • The existing Solar Pro 3, Pro 2 and Mini end on October 30, so migration is needed
  • Promotional prices change often

Prices and benefits may change. Check the official site before you pay.

Prices converted at 1 USD = ₩1,327.84 (2026-10-20). Original price shown in brackets. Taxes as listed by each provider.

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