Developer: Meta Platforms, Inc. | Free Plan: Yes, core assistant and Vibes are free for everyone | Starting Price: Free (Meta One Plus/Premium in limited testing) | Best For: Existing Meta app users, free AI image and video generation

Developer: Moonshot AI | Free Plan: Yes, Adagio tier at $0/month | Starting Price: $15/month billed annually (Moderato plan) | Best For: Budget-conscious users, long-context research and coding, agentic automation

Developer: Perplexity AI, Inc. | Free Plan: Yes, $0/month with limited daily usage | Starting Price: $20/month (Pro plan) | Best For: Researchers, students, professionals needing cited answers

Developer: xAI | Free Plan: Yes, $0/month with real-time web and X search | Starting Price: $30/month (SuperGrok plan) | Best For: Real-time information and search-driven chat, X/Twitter users, developers

Developer: Zhipu AI (Z.ai) | Free Plan: Yes, chat.z.ai is free with no subscription required | Starting Price: Free for chat; GLM Coding Plan from $18/month for coding-tool access | Best For: Everyday free chat users, budget-conscious developers, agentic coding workflows

Developer: OpenAI | Free Plan: Yes, $0/month with limited access to GPT-5.5 Instant | Starting Price: See official pricing page for current rate (Go plan) | Best For: Individuals, students, developers, teams and enterprises

Developer: Anthropic | Free Plan: Yes, $0/month with no credit card required | Starting Price: $17/month billed annually (Pro plan) | Best For: Individuals, writers and researchers, developers, teams and enterprises

Developer: Google | Free Plan: Yes ($0/month with a Google Account) | Starting Price: $4.99/month (Google AI Plus) | Best For: Students, researchers, developers, and Google Workspace users