GPT-5
OpenAI’s most advanced model
Retell AI - Voice AI Agent
Hire your AI call center
Updated February 2026
| GPT-5 | Retell AI - Voice AI Agent | |
|---|---|---|
| Rating | 5.0★ | 4.8★ |
| Reviews | 19 | 9 |
| Pros | 9 | 13 |
| FactScore™ | 65.1 | 47.8 |
FactScore™ Comparison
FactScore™ weighs both quality (rating) and popularity (reviews) for a fairer ranking than stars alone.
Pros & Cons
Only in GPT-5 — Pros
AI assistant AI integration Actionable insights High-quality output Developer experience Time-saving Context aware Frequent updates High accuracyBoth tools — Pros
—Only in Retell AI - Voice AI Agent — Pros
Lifelike voices Reliable platform Streamlined communication Real-time performance Flexible integration Easy deployment Effective for sales and support Saves engineering time Scalable pricing Api available Clear documentation Customizability Excellent supportOnly in GPT-5 — Cons
Slow performanceBoth tools — Cons
—Only in Retell AI - Voice AI Agent — Cons
Unclear mid-tier pricing Unusable in the UKDetails
| GPT-5 | Retell AI - Voice AI Agent | |
|---|---|---|
| Categories | LLMs, Foundation Models | LLMs, AI Chatbots, AI Voice Agents |
| Platforms | Web | Web |
| Became Popular | August 7, 2025 | February 8, 2024 |
| Website | openai.com | www.retellai.com |
Who Should Pick Which?
Choose GPT-5 if...
- AI assistant
- AI integration
- Actionable insights
Choose Retell AI - Voice AI Agent if...
- Lifelike voices
- Reliable platform
- Streamlined communication
With a FactScore™ of 65.1 vs 47.8, GPT-5 leads in community reception. GPT-5 uniquely offers AI assistant and AI integration, while Retell AI - Voice AI Agent stands out for Lifelike voices and Reliable platform.
What Users Say
GPT-5
We spent months developing the new version of Tellers.AI, betting that foundation models would excel at long-form, structured outputs with native tool use. GPT-5 did not disappoint; it proved to be...
As user study, pray, and achieve milestones, GPT-5 helps the pet reflect that progress through both words and actions, making the experience more meaningful. We also use GPT-5 to offer context-rich...
The Basedash data agent is powered by GPT-5. It allows us to ask incredibly complex questions and get genuine insights out of any data.
Retell AI - Voice AI Agent
I’ve been using Retell AI for a while now, and I can confidently say it’s one of the most game-changing platforms I’ve worked with. In a world where voice AI is rapidly evolving, Retell stands out ...
Retell powers our AI model and is a fantastic partner to work with
One of the best platforms for developing AI Voice Agents!
Related Comparisons
Frequently Asked Questions
Which is better, GPT-5 or Retell AI - Voice AI Agent?
Based on FactScore™, GPT-5 leads with a score of 65.1 vs 47.8. GPT-5 has a higher rating of 5.0★ compared to 4.8★.
What are the pros of GPT-5 compared to Retell AI - Voice AI Agent?
GPT-5 uniquely offers: AI assistant, AI integration, Actionable insights, High-quality output, Developer experience.
What are the pros of Retell AI - Voice AI Agent compared to GPT-5?
Retell AI - Voice AI Agent uniquely offers: Lifelike voices, Reliable platform, Streamlined communication, Real-time performance, Flexible integration.
Is GPT-5 better rated than Retell AI - Voice AI Agent?
GPT-5 is rated 5.0★ from 19 reviews. Retell AI - Voice AI Agent is rated 4.8★ from 9 reviews.
What is the FactScore™ of GPT-5 and Retell AI - Voice AI Agent?
FactScore™ weighs rating and review volume together. GPT-5 scores 65.1 and Retell AI - Voice AI Agent scores 47.8.
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