xAI releases Grok 4.3 with 1M token context window

xAI has released Grok 4.3 featuring a 1M token context window, always-on chain-of-thought reasoning, and native video input, priced at $1.25 per million input tokens, a 40% reduction from prior tiers. The model targets agentic workflows, posting strong benchmark scores on tool-calling and enterprise domain evaluations. Teams building long-context retrieval pipelines or multi-modal agents should evaluate this against Gemini 1.5 Pro and Claude 3.5, which share the 1M context tier but differ on reasoning architecture and multimodal handling.