ChatGPT vs Cloudflare Clef comparison

ChatGPT and Cloudflare Clef compared side by side in AI.

CurrencyUSDKRWEUR

ChatGPT

The most widely used general-purpose AI chatbot. Chat, writing, coding, image generation and web search in one place

What is good

  • No. 1 in users, so plenty of guides and tips
  • Widest range of features
  • Polished app and voice chat

What could be better

  • Tight usage limits on the free plan
  • Top features need the expensive Pro plans

ChatGPT official site

Cloudflare Clef

An open-source decision model released by Cloudflare in October 2026. Instead of text, it returns only choices and probabilities, and is compatible with the Jev API

What is good

  • Apache 2.0 open source, so free even on your own servers
  • Jev API compatible, so it is easy to swap in
  • Clef supports a 64K context (2x Jev's) and image decisions

What could be better

  • Decision-only, cannot chat or write
  • No app for general users

Cloudflare Clef official site

At a glance

Highlighted rows are where they differ.

ItemChatGPTVisit siteCloudflare ClefVisit site
Starting price$8+Official USD priceCheck siteNot applicable
Free tierFree plan availableFree plan available
Korean supportGoodLimited
Main models
  • GPT-6 (Sol)
  • GPT-6 Luna
  • GPT-6 Pro (Astra)
  • GPT-6.1 Sol
  • Image: ChatGPT Images 2.5
  • Clef (based on Qwen3.8-27B, supports image input)
  • Clef-flash (based on Qwen3.5-9B, low latency)
TypeAI servicesAI services
CategoryChatbot/Assistant, Image Generation, CodingOpen Models, Developer API
CompanyOpenAI, United StatesCloudflare, United States
Plans
  • Free
  • Go $8
  • Plus $20
  • Pro $100/$200/$500
  • Business $25 (annual $20)
  • Enterprise/Edu
  • Weights free (Apache 2.0)
  • Workers AI pay-as-you-go: Clef $0.24 per 1 million input tokens, Clef-flash $0.038
  • Workers AI free allocation of 10,000 Neurons per day (excess $0.011 per 1,000 Neurons, Workers Paid required)
  • Contact for fine-tuning
Pros
  • No. 1 in users, so plenty of guides and tips
  • Widest range of features
  • Polished app and voice chat
  • Apache 2.0 open source, so free even on your own servers
  • Jev API compatible, so it is easy to swap in
  • Clef supports a 64K context (2x Jev's) and image decisions
  • Clef-flash has a very cheap input price
  • Can be tried right away with the Workers AI free allocation
Cons
  • Tight usage limits on the free plan
  • Top features need the expensive Pro plans
  • Decision-only, cannot chat or write
  • No app for general users
  • The self-service fine-tuning platform is still in preparation
  • No public Korean performance data

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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