Elon Musk stated that Grok 4.5, xAI’s most advanced model launched in July 2026, is “not quite as good as Fable,” but highlights its speed, cost-effectiveness, and practicality for coding and autonomous agent workflows. Grok 4.5 is positioned as a competitive alternative in the AI market, emphasizing performance over raw capability and aiming to surpass offerings from rivals like OpenAI and Anthropic.

Grok 4.5: Grok 4.5 is xAI’s latest frontier AI model optimized for coding, agentic tasks, and knowledge work. Released in mid-July 2026, it is positioned as an efficient alternative to other high-end models. The news highlights Musk’s view that it delivers strong everyday utility despite not leading in every benchmark.
Elon Musk: Elon Musk leads xAI, the company developing the Grok family of AI models. He frequently shares direct assessments of model performance on X. In this news, Musk evaluates Grok 4.5’s practical strengths in speed and cost against competing models like Fable.

Model Focus: The model emphasizes practical performance in coding and autonomous agent workflows over raw capability.
Recent Launch: xAI introduced Grok 4.5 in July 2026 as its most advanced model to date.
AI Competition: Grok 4.5 is marketed as a faster and more cost-efficient option compared to offerings from OpenAI and Anthropic.