👀 Best LLM for AI Assistants in 2025 👀

Here’s a straight-shooting breakdown of the top options and why OpenAI’s GPT-4o is the clear winner for tool-heavy, real-time assistants.

Top Pick: GPT-4o

• Native multimodal support (text, vision, audio)

• Fast, efficient, and cheaper to run than GPT-4.1

• Real-time voice and chat assistant capabilities

• Excellent tool/function calling support

• Ideal for interactive, dynamic assistant workflows

GPT-4.1

• Great reasoning and output quality

• Supports tool use, but slower and more expensive

• Lacks native real-time voice support

• GPT-4o is its faster, smarter replacement

Claude 3.7 Sonnet

• Strong reasoning and text generation

• Tool use is still developing and less consistent

Gemini 2.0 Flash / Flash Lite

• Fast and lightweight

• Not ideal for complex assistants or tool chains

11 comments

skool.com/assistable

We give you the most dominantly unfair advantage in the agency space. The most installed GoHighLevel AI ever.

Leaderboard (30-day)

+51

+30

+25

+23

+15