ChatHub

ChatHub is a multi-model AI chat aggregator for individuals and researchers who want to use and compare multiple large language models in one place via a web app, browser extension, and mobile apps.

Key capabilities include:

• Side-by-side model comparison to ask one question and review responses from different models at once (free tier supports comparing 2 models)
• Multi-chat with up to 6 models simultaneously on paid tiers for broader brainstorming, verification, and drafting
• 20+ supported models (including GPT-4, Claude 3.5, and Gemini Pro; also lists newer options such as GPT-5, Claude 4.5, and Gemini 3)
• File and media workflows, including PDF and document upload, image chat, web search, code preview, and AI image generation

Pricing: Freemium. Pro is $14.99/month, Unlimited is $24.99/month, with annual billing offering savings; one-time payment options start at $39.

Notable for bundling access to multiple premium chat models under a single subscription, reducing the need to maintain separate paid plans for different AI assistants while enabling direct, side-by-side evaluation of outputs.