{"data":{"id":1979,"lang":"en","title":"xAI Launches Grok 4.5, an \"Opus-Class\" Model Built for Coding and Agentic Work","summary":"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.","category":"ai","category_label":"AI","published_at":"2026-07-10T06:01:32Z","updated_at":"2026-07-10T06:01:32Z","url":"https://techtools.cz/tools/news/article/1979-xai-launches-grok-4-5-an-opus-class-model-built-for-coding-and-agentic-work","api_url":"https://techtools.cz/news-api/v1/articles/1979?lang=en","markdown_url":"https://techtools.cz/news-api/v1/articles/1979.md?lang=en","image_url":"https://media.zenfs.com/en/reuters.com/8fd502a9c8e952eb8ee15ff6ba091ce8","word_count":159,"reading_time_minutes":1,"sources":[{"url":"https://tech.yahoo.com/ai/articles/spacexai-launches-grok-4-5-204749219.html","domain":"tech.yahoo.com"},{"url":"https://x.ai/news/grok-4-5","domain":"x.ai"}],"translation":{"lang":"cs","id":2052,"title":"xAI spustil Grok 4.5, model „třídy Opus“ určený pro programování a agentní úlohy","url":"https://techtools.cz/tools/news/clanek/2052-xai-spustil-grok-4-5-model-tridy-opus-urceny-pro-programovani-a-agentni-ulohy","api_url":"https://techtools.cz/news-api/v1/articles/2052?lang=cs"},"content":"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.\n\nCEO 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.\n\nPricing 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."}}