By Shyam Mohan — 09 Aug 2025

Intervo.ai Welcomes GPT-5: Transforming Voice AI with Advanced Reasoning Capabilities

Table of Contents

GPT-5's Impact on AI Voice Agents
Selecting the Best Model for Your Use Case
What’s Next: Unlocking GPT-5’s Full Potential

We are excited to announce the integration of GPT-5 into Intervo.ai! This advanced language model enhances our platform’s voice AI capabilities, delivering smarter interactions, more accurate reasoning, and cost-effective solutions for your business.

GPT-5's Impact on AI Voice Agents

GPT-5 represents a leap forward in AI reasoning. It takes voice agents beyond simple responses by understanding complex instructions and retaining context across extended conversations. Here’s how GPT-5 elevates voice AI:

Superior comprehension for intricate and multi-step instructions
Improved context retention that ensures seamless, fluid interactions
More precise and nuanced responses across a variety of scenarios

Reasoning models like GPT-5 are known for introducing higher latency, which can be a challenge for real-time applications. To overcome this, we’ve deployed GPT-5 Minimal—an optimized version that maintains GPT-5’s reasoning strength while minimizing delays. This allows us to offer the best of both worlds: enhanced intelligence with faster responses, ideal for real-time scenarios.

This marks the first time we’re deploying a reasoning model for live interactions. We’re continuously refining this integration, experimenting to find the best balance between performance and quality. For now, GPT-5 Minimal powers the backend of our voice agents, ensuring a smooth experience for users.

Selecting the Best Model for Your Needs

1. For Complex Workflows That Demand High Intelligence

(Examples: In-depth customer support, complex scheduling, dynamic task execution)

Model	GPT-5 (Minimal)	GPT-4.1	GPT-4o
Model Type	Reasoning Model	Non-Reasoning	Non-Reasoning
Intelligence (IFBench)	46%	43%	34%
Latency	Medium to High (1000ms)	Medium (720ms)	Medium (750ms)
Pricing	$0.04/min	$0.045/min	$0.05/min
Recommendation	GPT-5 provides the most intelligent responses but with higher latency. For real-time applications, GPT-5 Minimal or GPT-4.1 is better suited unless latency improves.

2. For Fast-Paced, Lightweight Tasks That Don’t Need Deep Reasoning

(Examples: Lead qualification, quick survey intake)

Model	GPT-5 Mini (Minimal)	GPT-5 Nano (Minimal)	GPT-4.1 Mini	GPT-4.1 Nano	GPT-4o Mini
Model Type	Reasoning Model	Reasoning Model	Non-Reasoning	Non-Reasoning	Non-Reasoning
Intelligence	Highest in this group	High	High	Medium	Medium
Latency	Medium (800ms)	Medium (700ms)	Low (550ms)	Low (500ms)	Medium (650ms)
Pricing	$0.012/min	$0.003/min	$0.016/min	$0.004/min	$0.006/min
Recommendation	GPT-5 Mini offers strong reasoning power with a balance for real-time tasks. For ultra-fast tasks, GPT-4.1 Mini is better. If cost is the primary concern, GPT-5 Nano provides the best value while maintaining high intelligence.

Recap: Key Takeaways

GPT-5: Best suited for high-complexity tasks that require deep intelligence, although latency may need further optimization.
GPT-5 Mini: A strong choice for real-time applications that need reasoning without compromising too much on speed.
GPT-5 Nano: Ideal for budget-conscious businesses that need powerful AI but can compromise on reasoning and speed.

While initial testing of GPT-5 models showed higher latency due to increased traffic, the potential benefits in intelligence and cost-efficiency make these models worth exploring. We will continue to monitor performance and improve as we go.

Looking Forward: The Future of Voice AI with GPT-5

GPT-5 brings us closer to a new era in voice AI. Here’s what we expect it to unlock:

Advanced workflows: The ability to follow complex, multi-step instructions, improving the efficiency of AI agents.
Seamless multi-step reasoning: Real-time applications will handle more intricate decision-making without delay.
Dynamic conversation adjustment: The model will adapt to user emotions and intents, tailoring responses to suit individual needs.
Natural tool creation: Agents will be able to generate and utilize tools directly from natural language, streamlining workflows even further.

As we continue testing and refining GPT-5, we are excited to unlock its full potential, pushing the boundaries of what’s possible with AI voice agents.

Visit intervo.ai to learn more or test it yourself.

Intervo.ai