Deep|SPCX: Grok 4.5 Brings SpaceXAI Back at the Frontier-Lab Table; Remain Bullish on Harness Data Flywheels and Compute Demand

What matters most about the Grok 4.5 release is that xAI / SpaceXAI is back at the table among North American frontier labs. At the beginning of the year, the North American frontier-model race still looked like a five-player game: OpenAI, Anthropic, Google, Meta, and xAI. But for a stretch, xAI had clearly fallen behind, and the market was more willing to treat it as a new neocloud, so the narrative shrank from five players to four. More recently, reports that Meta wanted to build "Meta Compute" and sell spare AI compute were read as frontier-lab consolidation and compute oversupply, bearish for neoclouds and AI infrastructure.

Grok 4.5: near-frontier and clearly cheaper

After Grok 4.5, that view needs to be revised. xAI has not leapfrogged OpenAI / Anthropic / Google across the board, but it has at least shown that it can once again build a model close to the frontier. Grok 4.5 is officially positioned for coding, agentic tasks, and knowledge work. API pricing is $2/M for input and $6/M for output, and the company stresses that, for comparable tasks, its token efficiency is roughly 2x that of leading models. Artificial Analysis gives Grok 4.5 an Intelligence Index score of 54, ranking it fourth behind only Fable 5, GPT-5.5, and Opus 4.8.

Source: Artificial Analysis