Microsoft Copilot vs Upstage Solar (솔라) comparison

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

CurrencyUSDKRWEUR

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≈€8.91+ ($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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