Grok 4.3 Tops Agentic Leaderboards - xAI Slashes API Pricing 40% to $1.25 Per Million

xAI has released Grok 4.3 through its API with aggressive pricing that undercuts the competition. The new model costs $1.25 per million input tokens and $2.50 per million output tokens, representing a 40% reduction from Grok 4.2's launch pricing. This positions xAI as a serious contender in the race for affordable large language model access. Grok 4.3 comes with a one million token context window and claims to be xAI's fastest and most intelligent model to date. The model has achieved top rankings across multiple benchmarks, leading ArtificialAnalysis leaderboards in agentic tool calling and instruction following. It also secured first place in ValsAI's enterprise benchmarks for case law and corporate finance applications. The model scored 53 on the Artificial Analysis Intelligence Index, well above the median for models in its price tier. This performance-to-cost ratio suggests xAI is targeting enterprise users who need extensive context handling and frequent tool calls without escalating costs. The company appears to be positioning Grok 4.3 as the go-to solution for agentic workloads that require long-form reasoning and multiple API interactions. The dramatic price reduction reflects the intensifying competition in AI model pricing. With access to a million tokens of context for just over a dollar, the industry is approaching new thresholds for affordable AI capabilities, raising questions about what aspects of model development and deployment can still be optimised beyond raw per-token costs.