Grok 4.5
Musk confirmed it on Jul 8: Grok 4.5 goes public Thursday, Jul 9 — leapfrogging the roadmapped 4.4 and landing the same day as GPT-5.6. He calls the 1.5T-parameter V9 model “Opus-class” but faster, more token-efficient and cheaper to run — his claim, not a benchmark; nothing independent has been published. The second it answers on the public API, ArtificialWatch fires.
Leaks & news, newest first.
Musk confirms: Grok 4.5 goes public Thursday
Following what he called positive beta feedback inside SpaceX and Tesla, Musk announced Grok 4.5 opens to everyone on Thursday, Jul 9 — apparently leapfrogging the roadmapped Grok 4.4 entirely. His pitch: “Opus-class” but faster, more token-efficient and lower-cost, on the 1.5T V9 foundation. No benchmarks or pricing published yet — the claim is his alone. One more headline in the same breath: xAI is now integrated into SpaceX and rebranded SpaceXAI. via Yahoo Finance · Bloomingbit
"Unlock the full power of Chat with Grok 4.5" surfaces in the web UI
A string referencing Grok 4.5 appeared in the Grok web interface — the classic pre-launch tell. No official announcement, benchmarks, pricing or date yet. via TestingCatalog
Grok 4.5 enters private beta at SpaceX and Tesla
The 4.5 beta is reportedly live inside Musk's companies with no public access and no independent benchmarks. Musk described early performance as “close to or beyond Opus” — an internal impression, not a published result. via TechTimes
Under the hood: a 1.5T V9 foundation, Cursor data in the mix
Grok 4.5 is reportedly built on a 1.5T-parameter V9 foundation (~3× the size of v8-small) with Cursor coding data folded into supplemental training. A larger 2T run is said to be cooking for an August release. via Digital Applied
The xAI slate: 4.4 in weeks, seven models in training, Grok 5 at 10T
xAI's published roadmap put Grok 4.4 about two-to-three weeks out at ~1T parameters, with seven models in training overall and Grok 5 targeting 10 trillion parameters. via MindStudio
The official word.
"Opus-class — but faster, more token-efficient, and lower cost."
Elon Musk announcing the Jul 9 public launch · Jul 8, 2026 — his claim; no independent benchmarks yet
Hear it the second Grok 4.5 answers.
Confirmed for Thursday — but confirmed isn't live. We sweep the public API every 60 seconds and fire the moment Grok 4.5 actually answers. Email + Chrome push free, SMS and a phone call on paid tiers.