<ul data-eligibleForWebStory="false">Elon Musk's AI company xAI has released Grok 4, a fast and smart model that some claim could be AGI.Grok 4 is xAI's solution akin to ChatGPT and Gemini, available in two versions: Grok 4 and Grok 4 Heavy.Grok 4 is excelling in benchmarks, outperforming competitors like o3 from OpenAI and Gemini 2.5 Pro.Using Grok 4 via OpenRouter can be costly, with prices ranging from $3 to $15 per million tokens, but there are subscription plans available.