xAI: Grok 4.3

Grok 4.3 is a text-and-image input model from xAI with a 1-million-token context window, tool use, and reasoning support. Structured output support is not confirmed in available data. The large context window suits tasks requiring long document ingestion, and tool support makes it viable for agentic workflows where the model needs to call external functions or chain actions. At $1.25 per million input tokens and $2.50 per million output tokens, it sits in the budget-to-mid tier for capable models. Its blended benchmark score of 84.8 comes from only three benchmarks, so treat that figure as directional rather than definitive. The agentic benchmark score is notably strong, making it worth shortlisting for teams building tool-calling pipelines who want lower costs. Buyers needing verified coding performance should note that the coding subscore of 67.7 is meaningfully below the overall average.