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josh
b3123815fa
## summary - swap chat model strings to `xai/grok-4.5` across the docs site, the shipped guides, and the example bots, so the docs lead with the latest model - apps/docs: ai overview, ai-sdk-tools, and streaming pages, the two landing-page code samples, and the live chat demo route (`app/api/chat/route.ts`, previously `openai/gpt-4.1-mini`) - packages/chat/resources/guides: the seven guides that use a chat model (slack connect, slack + ai sdk, liveblocks, vercel blob, github code review, daily digest, ai gateway) - examples: nextjs-chat and nuxt-chat bots - deliberately left non-chat model strings as they were, since grok-4.5 cannot fill those roles: the `openai/text-embedding-3-small` embedding model and the `openai/gpt-4o-mini` reranker - in the ai gateway guide, grok-4.5 is now the primary model but the fallback list stays cross-provider (`anthropic/claude-opus-4.8`, `google/gemini-3.1-pro-preview`) so the failover example still demonstrates real cross-provider fallback - also fixed a pre-existing prose/code mismatch in that guide, the fallback prose said `claude-opus-4.7` while the code listed `4.8`, now aligned to `4.8` --------- Signed-off-by: dancer <josh@afterima.ge>