Grok 4.7 arrived on September 21, 2026 from SpaceXAI, the name xAI now does business under. SpaceXAI calls it its most capable model and aims it at coding and knowledge work. It is the default model in SpaceXAI's Grok Build terminal agent, it ships in Cursor, and on the Grok API it costs $2 per million input tokens and $6 per million output tokens with a 500,000-token context window. GPT-6 Astra, OpenAI's most capable model, costs $10 and $50 and has a 1,050,000-token window.
The real-time angle that defined Grok still applies to the product: the Grok app answers with information from the web and X. In the APIs, current events come from search tools you switch on: Web Search and X Search for Grok, and web search for Astra. SpaceXAI's own GDPval chart places Grok 4.7 above GPT-6 Astra on professional knowledge work, while OpenAI's charts show Astra leading the models it compared on terminal and computer-use tasks. Astra's list price is five times Grok 4.7's for input and more than eight times for output, so check whether its extra capability shows up in your tasks. Run the same prompt through both in Omny.
Which should you choose?
ChatGPT
GPT-6 Astra · 1M context
Pick it if
you need long computer-use and terminal tasks or polished documents and slides.
Grok
Grok 4.7 · 500K context
Pick it if
you want lower token prices, answers drawn from X, or Grok inside Cursor and Grok Build.
Pick Grok 4.7 for lower-cost coding and knowledge work, and the Grok app when you want answers drawn from X. Pick GPT-6 Astra for long terminal, computer-use and document tasks, where OpenAI's published results are strongest. Compare them on your own prompts before paying Astra's higher rate.
Questions
Does Grok still have real-time X access?
The Grok app answers with information from the web and X. Through the API, Grok 4.7 only sees current events when you enable SpaceXAI's Web Search or X Search tools. Otherwise it works from training data with a May 2026 knowledge cutoff.
How much cheaper is Grok 4.7 than GPT-6 Astra?
At list prices Grok 4.7 costs $2 per million input tokens and $6 per million output tokens, against $10 and $50 for GPT-6 Astra. Both charge more for very long prompts: Grok 4.7 doubles its rates at 200K prompt tokens, and Astra raises its rates for prompts over 272K input tokens.