AI Tool Comparison

Retell AI vs ChatGPT

An objective side-by-side comparison based on global rankings, AI scores, and monthly user data.

Retell AI logo

Retell AI

Business

Voice AI infrastructure platform for building conversational phone agents.

AI Score13.0 / 100

#765

Global Rank

–

Monthly Users

Visit Retell AIFull Profile
VS
Higher Ranked
ChatGPT logo

ChatGPT

Writing & Chat

The world's most popular AI chatbot for writing, coding, research, and everyday tasks.

AI Score97.4 / 100

#3

Global Rank

400M+

Monthly Users

Visit ChatGPTFull Profile

Side-by-Side Comparison

Retell AIChatGPT
CategoryBusinessWriting & Chat
Global Rank#765#3
AI Score13.0/10097.4/100
Monthly Users–400M+
PricingPay-per-useFreemium
Websiteretellai.comchat.openai.com

Pros & Cons

Retell AI

  • Modular pricing allows choosing the right LLM and TTS combination for specific quality/cost needs
  • Enterprise custom pricing can reduce costs to as low as $0.05/minute at high volume
  • No mandatory base subscription — usage-based pricing starting at $0.07/minute
  • Real total cost ($0.13-$0.31/minute) is significantly higher than the advertised $0.07/minute base rate
  • Multiple separate fees (phone numbers, concurrent call slots) add complexity to cost estimation
  • Advanced LLM models (like Claude 3.5) add meaningfully to per-minute cost

ChatGPT

  • Largest user base and ecosystem of any AI assistant, with the most third-party integrations
  • Genuinely broad capability across writing, coding, research, and file analysis
  • Custom GPTs allow tailoring the assistant to specific repeated tasks
  • Frequent model updates keep it competitive on raw capability
  • Free tier has usage limits and access to a lower-tier model than paid plans
  • Can produce confident-sounding but incorrect information, especially without browsing enabled
  • Breadth can mean less depth than a tool purpose-built for one specific workflow
  • Data usage and training policies require attention for sensitive or regulated work