Top 6 Freely Available AI Chat Apps Comparison (2025) (This analysis was done by Grok) Dimension ChatGPT (Free) Claude (Free) Google Gemini (Free) Perplexity AI DeepSeek Grok Underlying Model GPT-4o, GPT-4o mini, GPT-3.5 Claude 3 Haiku, limited 3.5 Sonnet Gemini 1.5 Flash GPT-4o, Claude 3.5 Sonnet DeepSeek-R1, V3 Grok 3 Real-Time Web Access No Yes Yes Yes Yes Yes Context Window 32K tokens 200K tokens 1M tokens ~128K tokens ~128K tokens ~128K tokens Multimodal Capabilities Text, images, code Text, images, code Text, images, code, music Text, images, search results Text, images, code Text, images, code Response Quality High, human-like, occas...