xAI's Flagship Grok 4.5 Launches Across All Platforms Simultaneously

TL;DR: On July 22, xAI deployed its flagship Grok 4.5 across X, grok.com, iOS, and Android, making it available to all accounts. The web and mobile apps now offer four modes, all powered by Grok 4.5. Beyond model capabilities, the highlight is xAI's aggressive distribution strategy: a simultaneous full rollout across its major owned platforms without phased testing, accompanied by highly competitive API pricing.

Confirmed

Multiple posts indicate that xAI's VP of Engineering and Elon Musk confirmed the full-platform deployment of Grok 4.5. @Ready-Independent108 noted a usability tip: to ensure a new session uses 4.5, users should ideally start a new chat window.

According to @XFreeze, the web and iOS/Android apps offer four modes, with the interface clearly displaying the model name, including known modes like Fast and Expert. @DanielFarinax relayed xAI's claims that Grok 4.5 brings better intent following, longer conversation memory, more stable responses, and enhanced capabilities for chat, search, reasoning, and harder questions.

Other Disclosed Information

@eyishazyer summarized that Grok 4.5 solved 21 out of 23 tasks in VulcanBench v3 (designed for multi-file repository-level tasks) with an overall score of 91.3%. They also noted its API pricing at $2 per million input tokens and $6 per million output tokens, claiming it is cheaper than Fable 5, Opus 4.8, and GPT-5.6 Sol.

Why it matters

@eyishazyer believes the real news isn't just the benchmark score or price, but xAI's distribution move: pushing the latest flagship model simultaneously to X, web, and mobile to minimize experience gaps across different entry points. For users, this means easier access to the same generation of Grok across daily high-frequency platforms. For the industry, it shows xAI using its owned channels for a more aggressive simultaneous release, a channel strategy that Anthropic and OpenAI have not yet adopted.

2026-07-24 ~ 2026-07-24 · 16 related posts

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Primary sources

1 near-duplicate retellings: Ready-Independent108