Quick Answer
Grok 5 has not been released as of October 11, 2026. It does not appear in SpaceXAI's API model list, pricing or release notes, and there is no launch post on x.ai (docs, release notes, news). The latest official word on timing is Elon Musk on September 14, 2026, who put Grok 4.8 and Grok 4.9 first and gave no date for Grok 5.
The newest Grok you can use is Grok 4.7 (September 21, 2026).
About this update: we first published this guide in March 2026, when Grok 5 was expected in Q2. That did not happen, and most of the original predictions turned out wrong, so we rewrote it. Every fact below links to its source and was checked on October 11, 2026. Posts on X by Musk are company statements, not product specs, and we label them as such.
Grok 5 Timeline: Promises vs. What Happened
| When | What was said or happened | Source |
|---|---|---|
| Oct 18, 2025 | Musk: the probability of Grok 5 achieving AGI is "10% and rising" | X |
| Nov 14, 2025 | Musk says Grok 5 is a 6 trillion parameter model, coming "in Q1 sometime" (reported by press) | Benzinga |
| Jan 6, 2026 | xAI: "Grok 5 is currently in training" | x.ai |
| Jan 17, 2026 | Musk: Colossus 2 is operational, the "first Gigawatt training cluster in the world" | X |
| Feb 2, 2026 | SpaceX acquires xAI | x.ai |
| Mar 31, 2026 | Q1 passes without Grok 5 | — |
| Apr 8, 2026 | Musk: Colossus 2 is training 7 models, including a 6T and a 10T model | X |
| Jun 30, 2026 | Q2 passes without Grok 5 | — |
| Jul–Sep 2026 | Grok 4.5 (Jul 16), 4.6 (Aug 12) and 4.7 (Sep 21) ship instead | x.ai news |
| Sep 14, 2026 | Musk: "Grok 4.8 will be a noticeable improvement. Grok 4.9 is probably Astra/Fable class. Grok 5 maybe better than anything. We shall see." | X |
| Sep 24, 2026 | Musk is "cautiously optimistic that SpaceX will have a Fable/GPT-6 level model in 2 to 3 months" (model not named) | X |
What prediction markets say: on Polymarket, the June 30 and August 31 markets for a Grok 5 release resolved No. On October 11 the market priced about a 2% chance by October 31, 15% by November 30 and 47.5% by December 31, 2026 (Polymarket). Markets are not official information.
What We Actually Know About Grok 5
- Size: Musk's own figure is 6 trillion parameters (November 2025, via press). There is no official spec page. Since Musk has also said a 10T model is in training, it is not confirmed which training run will be released as "Grok 5", or that 6T will be the largest model announced.
- Architecture, context window, pricing, benchmarks, open-source status: not announced. Any numbers you see are guesses.
- AGI: Musk's 2025 estimate was "10% and rising". Asked about AGI on September 14, 2026, he replied "That will be Grok 5" (X). Neither is a measurable claim.
For scale, Musk says Grok 4.6 is a 1.5T model and Grok 4.7 a 2.1T model (X), and that Grok 4.8 is a 2.5T model trained with a new software stack (X). Grok 4.8 had not shipped as of October 11.
Who Makes Grok Now: xAI → SpaceXAI → SpaceXSI
| Date | Change | Source |
|---|---|---|
| Feb 2, 2026 | SpaceX acquires xAI | x.ai |
| May 6, 2026 | Musk: xAI "will be dissolved as a separate company, so it will just be SpaceXAI" | X |
| May 6, 2026 | Colossus 1 capacity goes to Anthropic; SpaceXAI trains on Colossus 2 | x.ai |
| Jul 6, 2026 | The company's X account becomes @SpaceXAI | X |
| Aug 14, 2026 | SpaceX completes its acquisition of Cursor | Cursor |
| Oct 4, 2026 | Musk agrees to rename SpaceXAI to SpaceXSI ("super intelligence") | X |
As of October 11, x.ai's pages say SpaceXSI, while the developer docs and legal entity still say SpaceXAI ("© 2026 SpaceXAI LLC"). The API is still api.x.ai (docs).
Colossus 2
- Operational since January 2026, announced by Musk as a 1-gigawatt cluster with "upgrades to 1.5GW in April" (X). Whether the 1.5 GW upgrade happened has not been officially confirmed, and satellite analysis in January suggested far less cooling capacity than 1 GW (Tom's Hardware).
- Hardware: according to Musk on September 25, 2026, Colossus 2 has 110,000 Nvidia GB200 and 440,000 GB300 chips, with another 220,000 GB300s due within a week, 220,000 in November and possibly 220,000 more by late December. The H100s and H200s are in Colossus 1 (150,000 H100, 50,000 H200, 30,000 GB200), which is leased to Anthropic (X).
- Workloads: several models at once (seven in April, per Musk), not only Grok 5.
Grok Models You Can Use Today
API prices per million tokens, input / cached input / output, for prompts under 200K tokens (pricing):
| Model | Released | Context | Price |
|---|---|---|---|
| Grok 4.7 (flagship) | Sep 21, 2026 | 500K | $2 / $0.50 / $6 |
| Grok 4.6 | Aug 12, 2026 | 500K | $2 / $0.50 / $6 |
| Grok 4.5 | Jul 16, 2026 | 500K | $2 / $0.30 / $6 |
| Grok 4.3 | Before mid-May 2026 | 1M | $1.25 / $0.20 / $2.50 |
| Grok 4.20 (incl. multi-agent) | Mar 2026 | 1M | $1.25 / $0.20 / $2.50 |
| grok-build-0.1 (coding) | May 2026 | 256K | $1 / $0.20 / $2 |
Prompts of 200K tokens or more cost double. Older models (Grok 4, Grok 4 Fast, Grok Code Fast 1, Grok 3) were retired on May 15, 2026 (migration notice).
Grok 4.7 in brief (docs, announcement): knowledge cutoff May 2026, text and image input, reasoning effort up to "xhigh", also available in Cursor, OpenRouter, Vercel and Cloudflare. SpaceXAI reports 46.3% on CursorBench 4.0 and 37.6% on Terminal-Bench 4.0; by its own table, Claude Fable 5.1 scores higher on both (51.8% and 57.9%). Musk described Grok 4.7 as "roughly on par with Opus 5.0" (X).
Consumer Plans
| Plan | Price | Source |
|---|---|---|
| Grok Free | $0 | x.ai/pricing |
| SuperGrok | $30/month (includes Grok 4.7 and Grok Bot) | x.ai/pricing |
| SuperGrok Plus | $100/month | x.ai/pricing |
| X Premium+ | $40/month in the US (includes SuperGrok access) | X Help |
Grok Bot
Launched August 11, 2026, Grok Bot gives you persistent "AI teammates", each working on its own cloud computer with a browser, file system and terminal (docs). It comes with paid Cursor plans and SuperGrok (x.ai/bot). On October 7, Musk said SpaceX "will use the best back end model for any given task, including Claude Opus 5.5" (X).
What This Means If You Are Choosing a Model
- Don't wait for Grok 5. There is no date, no price and no benchmark. Plan around models that exist.
- If you want Grok today, Grok 4.7 is competitively priced at $2/$6 per million tokens with a 500K context window, and it is part of the included "Cursor Models" pool on Cursor's paid plans.
- For coding, vendor-reported numbers still put Anthropic's Claude Opus 5.5 and Fable 5.1 and OpenAI's GPT-6 Astra ahead. See our October 2026 ranking of AI coding tools.
- Keep model calls behind one interface in your code, so you can switch to Grok 5 when (and if) it ships without rebuilding your application.
Sources
All checked October 11, 2026.
- SpaceXAI: API pricing, release notes, Grok 4.7 docs, Grok 4.7 announcement, May 15 retirements, news, Series E, xAI joins SpaceX, Anthropic compute partnership, consumer pricing, Grok Bot
- Elon Musk on X: AGI 10%, Colossus 2 operational, 7 models training, xAI dissolved into SpaceXAI, Grok 4.6/4.7 sizes, Grok 4.8–5 roadmap, Colossus hardware, SpaceXSI rename
- Cursor joins SpaceX, X Premium, Polymarket Grok 5 market
- Press: Benzinga on the 6T claim, Tom's Hardware on Colossus 2 capacity
