SpaceXAI launches Grok 4.5, claims to beat Claude Opus 4.8 with faster speeds and lower cost
Grok 4.5 is trained for coding and agents, rolling out now via multiple platforms
SpaceXAI officially released Grok 4.5 on July 8, 2026, calling it their smartest model yet. Built with Cursor, the model is optimized for coding, agentic workflows, and knowledge work. The company claims it can beat top frontier models like Claude Opus 4.8 based on internal testing and user feedback. Elon Musk teased the performance improvements on X, noting that Grok has reached a point where it can outperform other leading AI systems.
Grok 4.5 is now rolling out to eligible users through multiple channels: Grok Build, Cursor, and the xAI/SpacEXAI API. The pricing model is a major selling point—SpaceXAI emphasizes cost efficiency while delivering frontier-level intelligence. The release comes amid a crowded AI market, with OpenAI also announcing GPT-5.6 rollout and GPT-Live voice model. Developers and enterprises looking for a competitive coding assistant now have another strong option with Grok 4.5's speed and low cost.
- Grok 4.5 was trained specifically for coding and agentic tasks using Cursor, claims to surpass Claude Opus 4.8
- Available via Grok Build, Cursor IDE, and the xAI/SpacEXAI API with competitive pricing
- Rollout started July 8 for eligible users; position ed as cost-efficient frontier AI model
Why It Matters
New competition in AI coding agents with lower costs could disrupt developer tool market.