# Grok 4.5 debuts as xAI's most powerful AI model yet

_Wednesday, July 8, 2026 at 8:00 AM EDT · AI · Latest · Tier 2 — Notable_

![Grok 4.5 debuts as xAI's most powerful AI model yet — yourstory.com](https://images.yourstory.com/cs/286/07f6d7f0ed8e11ed819979969b4b51e2/Newww21-1783589064640.jpg)

xAI unveiled Grok 4.5 on July 8, 2026, describing it as the company's most capable AI model yet and a significant step forward in its effort to compete with leading AI developers, the company announced. Released as the first major launch since xAI became a public company, the model is positioned as a general-purpose assistant designed to handle coding, software development, research, writing, document creation and other knowledge-based tasks. According to xAI, Grok 4.5 delivers significantly better token efficiency, offering twice the token efficiency of competing models, which can reduce computing costs for businesses running AI applications at scale. The model is priced at $2 per million input tokens and $6 per million output tokens. Elon Musk described the model as "Opus-class," comparing it with Anthropic's premium AI models, and claimed it performs at a level comparable to Opus 4.7 while offering faster responses and lower costs. Independent evaluations will ultimately determine how well the model performs across coding, research, creative writing and business applications outside internal testing.

## Sources

- [yourstory.com](https://yourstory.com/ai-story/xai-grok-4-5-launch-token-efficiency-ai)

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Retrieved: 2026-07-10T05:11:02.320Z
Publisher: Tech & Business (techandbusiness.org)