grok 4 xAI Expands Grok 4 With Multi-Agent Reasoning and New Tiers xAI's September 2025 update to Grok 4 brings multi-agent orchestration, a massive 1M-token context window, and a tiered subscription model to compete with leading AI models.
grok 4 xAI Launches Grok 4 to Challenge Leading AI Models xAI releases Grok 4 on July 9, 2025, skipping the expected 3.5 version to deliver significant upgrades. The new model aims to directly compete with the most advanced AI systems currently available.