AI Tool Comparison
Comparing as AI Agent & Orchestration FrameworksRetell AI vs ChatGPT
Retell AI
VS
ChatGPT
Verdict by Category
Detailed Comparison
Feature
Retell AI
ChatGPT
Pricing
FreemiumRetell AI's Pay-as-you-go plan starts at $0 with $10 in free credits, no commitments, and full platform access. AI Voice Agents cost $0.07-$0.31 per minute depending on the LLM and voice provider selected, with a base cost breakdown of $0.055/min for Retell's voice infrastructure, $0.015-$0.040/min for text-to-speech (ElevenLabs is priciest at $0.040/min), and LLM costs ranging from $0.003/min (GPT 5 nano) to $0.16/min (GPT 5.5). AI Chat Agents start at $0.002+ per message. The plan includes 20 free concurrent calls, with additional concurrency at $8/month each; the first 10 knowledge bases are free, then $8/month each; phone numbers cost $2/month and verified numbers have a one-time $10 fee. Add-ons include Knowledge Base (+$0.005/min), Batch Call (+$0.005/dial), Branded Call ID (+$0.10/outbound call), Advanced Denoising and Safety Guardrails (+$0.005/min each), PII Removal (+$0.01/min), and AI Quality Assurance ($0.10/min after 100 free minutes). The Enterprise plan offers custom pricing with dedicated stable servers, custom SSO, role-based access control, custom MSA/DPA/BAA terms, high concurrent call caps, and 24/7 support with a dedicated portal.
FreemiumFree Plan: Enjoy basic access with the core AI model, limited messages, uploads, image creation, and memory features — perfect for exploring AI capabilities at no cost.
Go Plan (Rs 1,400/month): Get expanded access with more messages, uploads, image creation, longer memory, and enhanced voice mode for a smoother AI experience.
Plus Plan (Rs 5,700/month): Unlock advanced models, improved image creation with Thinking, expanded memory, Codex coding agent, deep research, and custom GPTs for maximum productivity.
Pro Plan (From Rs 27,999/month): Designed for professionals needing the highest limits, including advanced models, maximum Codex access, deep research, faster image creation, and unlimited core chat.
Categories
AI ChatbotsAI No-Code / Automation ToolsAI Developer APIs & PlatformsAI Audio & Music Tools
Large Language Models (LLMs)AI ChatbotsAI Writing Assistant ToolsAI Productivity ToolsAI Coding AssistantsAI Personal Assistant ToolsAI Research & Education ToolsAI Copywriting ToolsAI Developer APIs & PlatformsAI Data & Analytics ToolsAI Marketing ToolsAI Search EnginesAI No-Code / Automation Tools
Summary
Build human-like AI voice agents for phone calls with ~600ms latency
Engage in dynamic conversations, debug code, and generate creative content with advanced AI.
Retell AI Pros & Cons
Pros
- Industry-leading ~600ms latency for natural, fluid conversations
- True pay-as-you-go billing with no annual contracts required to start
- Highly configurable flow builder with real-time function calling
- Broad LLM and TTS provider choice, including Claude, GPT, and Gemini models
- SOC 2, HIPAA, and GDPR compliant out of the box
- Simulation testing and detailed call analytics for continuous quality improvement
Cons
- Billing continues during silence and hold time since speech recognition stays active
- Advanced voices like Elevenlabs cost more per minute than platform-native voices
- Enterprise-grade features like SSO and custom BAAs require the custom-priced Enterprise plan
- Costs can add up quickly at scale when combining premium LLMs, TTS, and add-ons like AI QA
- No native mobile app; management happens through the web dashboard
ChatGPT Pros & Cons
Pros
- Highly interactive and natural conversational experience
- Capable of nuanced understanding and response generation
- Assists with complex tasks like code debugging and content creation
- Continuously refined through human feedback and model updates
- Offers dedicated business and enterprise solutions
- Provides an accessible interface for broad user engagement
Cons
- May generate plausible-sounding but incorrect or nonsensical information
- Sensitive to input phrasing, sometimes requiring rephrasing for accurate answers
- Can be excessively verbose and repetitive in its responses
- Often guesses user intent instead of asking clarifying questions for ambiguous queries
- May occasionally respond to harmful instructions or exhibit biased behavior
- Advanced features and higher usage limits require a paid subscription