{"slug": "grok-4-1-fast-reasoning-deprecated", "title": "Grok 4.1 Fast (Reasoning) deprecated", "summary": "XAI's Grok 4.1 Fast (Reasoning) model, released 2025-11-19 with a 128k context window and 30k max output, has been marked deprecated with no announced retirement date, according to a provider announcement tracked by models.dev. The model is listed under the identifier xai/grok-4.1-fast-reasoning on Google Vertex, and the deprecation notice directs developers to a tool that scans repositories for models facing retirement.", "body_md": "GG◑ Deprecating\n\n# Grok 4.1 Fast (Reasoning)\n\nGoogle · xai/grok-4.1-fast-reasoning\n\nReleased2025-11-19\n\nRetiresno announced date\n\ngroktext+image128k context30k max out\n\nalso matches: \n\n`xai/grok-4.1-fast-reasoning`` google/xai/grok-4.1-fast-reasoning`\n[provider announcement →](https://models.dev/google-vertex/xai/grok-4.1-fast-reasoning)\n\nDoes your code call Grok 4.1 Fast (Reasoning)?\n\n$ curl -fsSL https://llmstatus.ai/install.sh | bash\n\nThen `mm status` in any repo — it finds every model you use and flags the ones on a clock. No account, nothing uploaded.\n\n[Get alerted before it retires →](/sign-up)", "url": "https://wpnews.pro/news/grok-4-1-fast-reasoning-deprecated", "canonical_source": "https://llmstatus.ai/m/google/google/xai/grok-4.1-fast-reasoning", "published_at": "2026-09-10 18:00:07+00:00", "updated_at": "2026-09-10 18:37:50.362775+00:00", "lang": "en", "topics": ["large-language-models", "ai-products", "developer-tools"], "entities": ["xAI", "Grok 4.1 Fast (Reasoning)", "Google", "Google Vertex", "models.dev"], "alternates": {"html": "https://wpnews.pro/news/grok-4-1-fast-reasoning-deprecated", "markdown": "https://wpnews.pro/news/grok-4-1-fast-reasoning-deprecated.md", "text": "https://wpnews.pro/news/grok-4-1-fast-reasoning-deprecated.txt", "jsonld": "https://wpnews.pro/news/grok-4-1-fast-reasoning-deprecated.jsonld"}}