{"slug": "grok-4-3-grok-build-is-now-installed-in-railway-sandboxes-https-t-co-cfnlseocit", "title": "Grok 4.3: Grok Build is now installed in Railway sandboxes https://t.co/cfNLseOCit", "summary": "XAI released Grok 4.3 on April 17, 2026, with the Grok Build now installed in Railway sandboxes. The model has achieved a score of 8 on the GDP.pdf benchmark and ranks #57 on the LM Arena leaderboard with 37,636 votes.", "body_md": "[xAI](/providers/xai)Grok 4.3\n\n# Is Grok 4.3 out yet?\n\nYes.\n\nHow we confirmed it\n\nReleased via official access\n\nApril 17, 2026 at 12:00 AM UTC\n\nWaiting for xAI's next model?\n\nOne click creates your free account (or signs you into an existing one) and turns on alerts for xAI releases. There's no password to set, and you can unsubscribe any time.\n\nBenchmarks\n\nGDP.pdf\n\nGrok 4.3 (High) · via Epoch AI · captured Jul 3, 2026 · [source](https://epoch.ai/benchmarks/gdp-pdf)\n\n8\n\nLM Arena#57\n\ngrok-4.3 · via LM Arena · 37,636 votes · captured Jul 3, 2026 · [source](https://lmarena.ai/leaderboard)\n\n1443.88\n\nSourced metrics mirrored with attribution — not community sentiment.\n\nData from [Epoch AI, “AI Benchmarking Hub”](https://epoch.ai/benchmarks) (CC BY 4.0).\n\nVibe rating\n\nHow this model actually feels to use, rated by the people here.\n\nNo vibe ratings yet. Be the first.\n\n[Sign in](/signin) to rate this model.\n\nModel Pulse\n\nHow is this model behaving today? One check-in per person per day: the running record of “did they nerf it”. Resets at midnight UTC.\n\nNo check-ins yet today. Be the first to log how this model is behaving.\n\n[Sign in](/signin)\n\nCommunity consensus\n\nAn AI summary of the public comments here. Not a sourced fact.\n\nNot enough public feedback yet to summarize. Add a comment to help build the picture.\n\n[Compare Grok 4.3 with another model →](/compare?models=grok-4-3)\n\nAlso waiting on: [ChatGPT 5.6](/models/chatgpt-5-6), [Gemini 3.5 Pro](/models/gemini-3-5-pro), [Claude Fable 5.1](/models/claude-fable-5-1), [Claude Mythos 5.1](/models/claude-mythos-5-1)\n\n## Comments\n\nMissing a model, or wishing OutYet did something it doesn't? [Tell us what to build](/submit).", "url": "https://wpnews.pro/news/grok-4-3-grok-build-is-now-installed-in-railway-sandboxes-https-t-co-cfnlseocit", "canonical_source": "https://outyet.ai/models/grok-4-3", "published_at": "2026-07-02 00:00:00+00:00", "updated_at": "2026-07-03 21:23:43.833046+00:00", "lang": "en", "topics": ["large-language-models", "ai-products", "ai-tools"], "entities": ["xAI", "Grok 4.3", "Railway", "Epoch AI", "LM Arena"], "alternates": {"html": "https://wpnews.pro/news/grok-4-3-grok-build-is-now-installed-in-railway-sandboxes-https-t-co-cfnlseocit", "markdown": "https://wpnews.pro/news/grok-4-3-grok-build-is-now-installed-in-railway-sandboxes-https-t-co-cfnlseocit.md", "text": "https://wpnews.pro/news/grok-4-3-grok-build-is-now-installed-in-railway-sandboxes-https-t-co-cfnlseocit.txt", "jsonld": "https://wpnews.pro/news/grok-4-3-grok-build-is-now-installed-in-railway-sandboxes-https-t-co-cfnlseocit.jsonld"}}