Battle of the AI Titans: GPT-5 vs Grok 4 vs Microsoft Copilot – Who Wins the Next-Gen AI Showdown?
GPT-5 launched in August 2025 with a 400,000-token context window, multimodal text-and-image input, test-time compute, and access for about 700 million ChatGPT users worldwide. GPT-5 comes in three tiers—GPT-5, GPT-5 Mini, and GPT-5 Nano—sharing the 400K context and multimodal input while offering different performance and cost profiles. The GPT-5 API pricing is $1.25 per million input tokens and $10 per million output tokens, plus $0.125 per million cached tokens. Grok 4 launched in July 2025, promoted as the world’s most powerful AI model, and introduced Grok 4 Heavy as a multi-agent variant capable of collaborating on problems. In Humanity’s Last
