TL;DR: A lifetime subscription to ChatPlayground AI’s Unlimited Plan is on sale for $74.97 (reg. $619) — 87% off. Credit: ChatPlayground AI If you’ve ever typed the same prompt into ChatGPT, and then Gemini, and then Claude just to see which one gives you the best answer, ChatPlayground AI was basically built for you. This new AI platform lets you send prompts to multiple models at the same time, and a lifetime subscription is on sale now for $74.97 (reg. $619). ChatPlayground AI lets you run any prompt across 20+ AI models at once, including ChatGPT, Claude, Gemini, and Perplexity. Instead of toggling between tabs and losing your train of thought, you get side-by-side comparisons in the same tab you’re working from, so you can quickly grab the best response and keep it pushing. Mashable Deals By signing up, you agree to receive recurring automated SMS marketing messages from Mashable Deals at the number provided. Msg and data rates may apply. Up to 2 messages/day. Reply STOP to opt out, HELP for help.…