# xAI Launches Grok 4.5, an "Opus-Class" Model Built for Coding and Agentic Work

*2026-07-10 06:01 UTC · AI · 1 min read*

> xAI released Grok 4.5, its first coding- and agent-focused model, claiming Opus-class performance at a lower price than Claude or comparable models.

xAI released Grok 4.5 on July 8, 2026, opening public access on grok.com and the X app the following day after a private beta with SpaceX and Tesla engineering teams. It is the company's first model built specifically for coding and agentic tasks, trained on xAI's 1.5-trillion-parameter V9 foundation using tens of thousands of Nvidia GB300 GPUs and supplemented with real developer session data from Cursor.

CEO Elon Musk described Grok 4.5 as "an Opus-class model, but faster, more token-efficient and lower cost," positioning it directly against Anthropic's flagship. The model ranks fourth on the Artificial Analysis Intelligence Index, ahead of every open-weight model and all Gemini models.

Pricing lands at $2 per million input tokens and $6 per million output tokens — cheaper than Claude Opus 4.8's $5/$25 but pricier than OpenAI's newly launched GPT-5.6 Luna at $1/$6. Grok 4.5 is available immediately via Grok Build, Cursor, and the API, though EU access remains blocked until mid-July.

## Sources

- [tech.yahoo.com](https://tech.yahoo.com/ai/articles/spacexai-launches-grok-4-5-204749219.html)
- [x.ai](https://x.ai/news/grok-4-5)

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TechTools News · https://techtools.cz/tools/news/article/1979-xai-launches-grok-4-5-an-opus-class-model-built-for-coding-and-agentic-work
Česká verze: https://techtools.cz/tools/news/clanek/2052-xai-spustil-grok-4-5-model-tridy-opus-urceny-pro-programovani-a-agentni-ulohy