Gemini 3.8 Flash and Grok 4.7 are the newest models from Google and SpaceXAI (xAI's current name), released 19 days apart in September 2026. Both target coding and agent work at prices well below the top OpenAI and Anthropic models. Gemini 3.8 Flash costs $0.75 per million input tokens and $3.75 per million output tokens until the end of 2026, and Grok 4.7 costs $2 and $6. Gemini accepts up to 1,048,576 input tokens of text, images, video, audio or PDF. Grok 4.7 takes text and images within a 500,000-token window.
Both have a live-data story. Gemini can ground answers in Google Search and Google Maps, and it runs in the Gemini app, AI Mode and Google Sheets for AI Pro and Ultra subscribers. Grok answers from the web and X in the Grok app, and SpaceXAI's API offers Web Search and X Search tools. Google aims 3.8 Flash at long-horizon software engineering and enterprise agents. SpaceXAI aims Grok 4.7 at longer-running coding tasks and documents, and ships it in Cursor and Grok Build. Each vendor picks its own comparisons and test harnesses, so compare them on your own tasks in Omny.
Which should you choose?
Gemini
Gemini 3.8 Flash · 1M context
Pick it if
you want the lower token price, video or audio input, or Gemini in Search and Sheets.
Grok
Grok 4.7 · 500K context
Pick it if
you want X Search, Grok in Cursor or Grok Build, or the Grok app's take on current events.
Gemini 3.8 Flash is cheaper per token, takes more input types and fits Google's apps. Grok 4.7 brings X Search and ready integrations in Cursor and Grok Build. Both are priced for everyday coding and agent work, so test them side by side.
Questions
Which is cheaper, Gemini or Grok?
Gemini 3.8 Flash, at $0.75 per million input tokens and $3.75 per million output tokens through 2026, against $2 and $6 for Grok 4.7. Gemini's rates rise to $1.50 and $7.50 on January 1, 2027, and Grok's double for prompts of 200K tokens or more.
Does Gemini have real-time data like Grok?
Yes, from different sources. Gemini can ground answers in Google Search and Google Maps, and Grok can search the web and X. In both APIs you switch these tools on per request.