Grok 4.5
It’s out: Grok 4.5 went public Thursday, Jul 9 — leapfrogging the roadmapped 4.4 and landing the same day as GPT-5.6 and Meta’s Muse Spark 1.1. The 1.5T-parameter V9 model is live in Grok Build, in Cursor on all plans, and from the SpaceXAI console at $2 in / $6 out per million tokens — though not yet in the EU. SpaceXAI’s own chart has it beating Opus 4.8 on two of the four benchmarks it chose to publish (DeepSWE 1.0 and Terminal-Bench 2.1) and trailing on the other two — the “Opus-class” call is still theirs, not an independent result. xAI has since shipped Grok 4.6 (Aug 12) and Grok 4.7 (Sep 21).
Leaks & news, newest first.
Grok 4.7 ships, still at $2/$6
SpaceXAI released Grok 4.7, which it calls its most powerful model for coding and knowledge work, trained with a longer reinforcement-learning run on a harder mix of tasks. It is priced from $2 in / $6 out per million tokens, unchanged from 4.6, and is live in Cursor, Grok Build and the Grok API. via SpaceXAI
Grok 4.6 ships at the same price as 4.5
SpaceXAI released Grok 4.6, built on 4.5 with a focus on long-running agents and visual work, at an unchanged $2 in / $6 out per million tokens. Its launch post puts 4.6 at 61 on the Artificial Analysis Intelligence Index, against 56 for Grok 4.5. via SpaceXAI
Grok 4.5 is public — $2/$6 pricing and a two-for-four benchmark card
SpaceXAI opened Grok 4.5 to everyone: Grok Build, Cursor on all plans, and the SpaceXAI console, priced at $2 in / $6 out per million tokens — with no EU availability yet. The launch chart claims it outperforms Claude Opus 4.8, but the fine print shows wins on two of the four published benchmarks (DeepSWE 1.0, Terminal-Bench 2.1) and losses on the other two. It shipped into the busiest drop day of the year, opposite GPT-5.6 and Muse Spark 1.1. via SpaceXAI · Axios
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
$2 / $6 per million tokens, on xAI's own API.
How much does Grok 4.5 cost?
xAI's own API lists Grok 4.5 (grok-4.5) at $2 per million input tokens and $6 per million output tokens, and $0.30 per million cached input tokens. Prompts over 200K tokens cost $4 input and $12 output. Prices as published in the models.dev catalog, as of 2026-10-06.
What is Grok 4.5's context window?
500K tokens, as xAI lists Grok 4.5 (grok-4.5).
Listed by 28 providers, exact ids below.
28 providers list Grok 4.5 in the models.dev catalog (as of 2026-10-06), under the model ids shown below.
grok-4.5x-ai/grok-4.5spacexai/grok-4.5grok-4.5grok-4.5grok-4.5xai/grok-4.5x-ai/grok-4.5grok-4.5grok-4-5xai/grok-4.5grok-4.5Also listed by Impossibl, Kenari, Kilo Gateway, LLM Gateway, Merge Gateway, NanoGPT, Ofox, OpenCode Go, OpenCode Zen, Opper, OrcaRouter, Pioneer, Requesty, Tempr Gateway, Venice AI, ZenMux.
Listings cover the model family, so a provider may list a sibling tier under the same name. Check the id before you build on it.
Head to head, on the public leaderboards:
Grok 4.5 answered. Hear the next one first.
Grok 4.5 is live — this page is its drop record. xAI has since shipped 4.6 and 4.7. The watch moves to Grok 4.8, which Musk said in mid-September was finishing training, to Grok 5, and to every other model on the board. Email + Chrome push free, SMS and a phone call on paid tiers.