If you have spent any time on X lately, you have seen Grok: the AI assistant from xAI, now part of SpaceX. It has changed versions at a remarkable pace this year, and everyone keeps asking about Grok 5. This article dissects Grok using official xAI documentation and news reports: which models exist, what they do, what they cost, and where Grok 5 really stands.
- The newest model available is Grok 4.7, released September 21, 2026 as xAI’s flagship for coding, agents and knowledge work.
- It has a 500K-token context window and API pricing of $2 per million input tokens and $6 per million output tokens.
- Grok 5 has not been released; xAI only said it was in training and has given no official date.
- Specs circulating for Grok 5, such as multi-trillion parameters, are unconfirmed.
1. What Is Grok and Who Is Behind It?
Grok is the AI assistant built by xAI, the company founded by Elon Musk. According to TechCrunch, SpaceX acquired xAI in February 2026, and xAI’s current documentation is published under the SpaceXSI name, while Axios calls the company SpaceXAI. The names changed; the product is still Grok.
Grok’s signature trait is its link to X and web search. xAI’s docs are explicit: the model itself knows nothing about current events unless the Web Search and X Search tools are enabled. Live information is a tool capability, not built-in knowledge.
2. The Recent Generations: 4.5 to 4.7
Grok’s release rhythm in 2026 has been roughly monthly:
- March 10, 2026: Grok 4.20 and its multi-agent version arrive on the API.
- July 8, 2026: Grok 4.5, trained alongside Cursor according to Axios. Musk called it an Opus-class model that is faster and cheaper.
- August 12, 2026: Grok 4.6, focused on long-running agents.
- September 21, 2026: Grok 4.7, built on a new and larger base model.
On May 15, 2026 xAI also retired older models such as Grok 4, Grok 4.1 Fast and Grok 3 from its API; requests to those names are now redirected to Grok 4.3.
3. What Does Grok 4.7 Offer?
The official models page describes Grok 4.7 as the flagship for code and everything else:
- 500K-token context window;
- API pricing of $2 / $6 per million input / output tokens;
- configurable reasoning effort (low up to xhigh);
- agentic tool calling with, in xAI’s words, minimal hallucinations;
- knowledge cutoff of May 2026.
xAI claims Grok 4.7 beats Grok 4.6 on benchmarks such as CursorBench and Terminal-Bench. Those figures are published by the company itself, not independently verified, so read them with care. Reports also say 4.7 launched via the API, Cursor and Grok Build; xAI has not clearly said it now powers the consumer app.
4. The Real Edge: Live Access to X and the Web
For creators and media teams, Grok’s strength is finding what is happening right now: trends, reactions and breaking discussions on X. Practical uses:
- spotting hot topics before everyone makes a video about them;
- summarizing long threads for idea generation;
- fast background research before writing a script.
A caution: like any model, Grok can be wrong or biased. Verify every figure against the primary source before publishing it.
5. The Wider Family: Images, Video, Voice and Code
- Grok Imagine: image generation and editing (from about $0.02 per image) and video up to 1080p (from about $0.02 per second).
- Grok Voice API: real-time voice conversation, speech-to-text and text-to-speech.
- Grok Build: a coding agent model with a 256K-token window.
- Grok 4.3 and 4.20: both offer a 1M-token window, twice that of Grok 4.7. For very large inputs, the newest model is not always the best pick.
6. Plans and Pricing
Since October 12, 2026, new customers buy through The X Subscription:
- Plus: $8 per month;
- Premium: $30 (4x Plus usage, with Grok Bot);
- Super: $100 (15x);
- Ultra: $200 (50x and the most powerful chat models).
Existing SuperGrok plans continue for current subscribers. Prices change quickly, so check xAI’s pricing page before buying.
7. Where Is Grok 5?
Short answer: not out yet. The only official statement came with xAI’s January 2026 funding announcement: Grok 5 is in training. The earlier targets (late 2025, Q1 and Q2 2026) all passed. Based on Musk’s posts of September 14, 2026, the ladder ahead is Grok 4.8, then 4.9, then Grok 5.
Musk has suggested Grok 5 could approach AGI, but that is an opinion with no benchmark behind it. Figures like 6 to 10 trillion parameters or a 1.5M-token window are rumors or estimates, not official specs.
8. How Grok Compares With Rivals
According to Axios, Grok 4.5 launched at $2 / $6 per million tokens, while Claude Opus 4.8 was priced at $5 / $25 and GPT 5.6 Luna at $1 / $6. Axios also noted that SpaceXAI itself accepts that its model trails the largest and newest rival models. A fair summary: Grok competes on price-performance and live data, but it still chases the leaders on general intelligence rankings.
9. Who Should Look at Grok?
- Content creators: for idea discovery and trend detection.
- Developers: Grok 4.7 and Grok Build for agentic work.
- Analysts: the 1M-token models for large documents.
- Everyday users: the limited free tier is enough to get started.
Conclusion
In 2026 Grok has grown from a chatty bot into a full model family. Grok 4.7 is usable today and Grok 5 is still a promise. The sensible approach is to work with what exists and follow news only through xAI’s official channels.
Frequently Asked Questions
What is the latest Grok model?
Grok 4.7, released September 21, 2026.
Has Grok 5 been released?
No. As of November 8, 2026 there is no Grok 5 entry in xAI’s official notes.
Is Grok free?
A limited free tier exists; paid plans start at $8 per month.
Which model has the biggest context window?
Grok 4.3 and Grok 4.20, at 1M tokens.
Sources
xAI model docs ·
Axios: Grok 4.5 launch ·
AI Toolbox: Grok models explained ·
GEO Toolbox: Grok 5 status ·
xAI: Introducing Grok 4.7
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