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Grok 4.8

watching65% by Nov 30

xAISOTA scope

Not out yet. xAI hasn't released Grok 4.8; the latest signal, on September 29, 2026: Grok 4.8 shows up in xAI's own code: its public coding agent already lists it. What we know so far: unannounced, no date — xAI's own public grok-build repo lists grok-4.8 in its model picker and router tests (read Sep 29; the tests use 500K and 256K context windows); a Cursor server list reportedly carries grok-4.8-high, -high-fast and -xhigh-fast (single source); Musk: ~2.5T params on a new C++ stack; Oct 7: Musk says most Grok Bot requests "will be handled by a lightning-fast version of Grok 4.8 when that comes out" (his X post); Oct 30: Musk: "I know it's taken longer than expected, but Grok 4.8 will not be a disappointment", adding that xAI is not optimizing for benchmarks (his X post; still no date); Nov 4: 44 days since Grok 4.7 shipped on Sep 21, already longer than the 34 days from 4.5 to 4.6 and the 40 from 4.6 to 4.7; xAI's API release notes (newest entry Nov 2) and OpenRouter's catalog list no grok-4.8; Polymarket's "next Grok (4.8+) by Nov 30" market: 65% (Nov 4). Swept every 60 seconds across provider catalogs. The moment it answers on a public API, alerts fire: a text or a call on paid plans the second it's confirmed, then a free Chrome push and email about 15 minutes later.

An email when Grok 4.8 answers on a public API, about 15 minutes after members, plus every frontier launch · no card

Timeline

2026-09-29

Grok 4.8 shows up in xAI's own code: its public coding agent already lists itpost

xAI's public grok-build repository, the source of its Grok Build coding agent, now lists grok-4.8 by name. The model picker registers "grok-4.8" as "Grok 4.8", and the router tests route to it with 500K and 256K context windows. We read the code on GitHub on September 29; the repo was last updated that evening.

Live release odds

Next Grok (4.8 or later) released by Nov 3065%

via Polymarket · markets are sentiment, not a promise — the alert only fires on a real API answer

Current model in this line

Grok 4.7, live since September 21, 2026 · $2 / $6 per 1M tokens on xAI's API · AW Index 59.6.

The official word

We alert on verified API behavior, never on announcements alone — but when xAI speaks, it's here: x.ai/news ↗

Grok 4.8: quick answers

Is Grok 4.8 out yet?

Not yet. ArtificialWatch has not seen Grok 4.8 answer on any public API it sweeps. The moment it does, subscribers get an alert.

When will Grok 4.8 be released?

The vendor has not shipped it. Polymarket's market on the next Grok (4.8 or later) puts it at 65% by Nov 30 (Polymarket, refreshed every 30 minutes). Markets are sentiment, not a promise.