Gemini Pro vs Grok
Similar price band, different shapes. Gemini 3.1 Pro brings a million-token context, three modalities and the reasoning-benchmark lead. Grok 4.6 brings stronger built-in tool use and a 500K window that gets expensive past 200K. Gemini is the more general instrument; Grok is tuned for agents.
| Gemini Pro | Grok | |
|---|---|---|
| Provider | xAI | |
| Current release | 3.1 Pro | 4.6 |
| Tier | Frontier | Frontier |
| Context | 1M | 500K |
| Cost | Moderate | Moderate |
| Modalities | text, vision, audio | text, vision |
| Open weights | No | No |
Cost is a tier, not a quote — providers change prices often. Check Google and xAI before you commit. Last updated 2026-08-14.
Which one to pick
Gemini ProGoogle · 3.1 Pro
Reasoning over very long inputs — whole codebases, long documents, video
Reach for it when- Long documents, video, or audio in the prompt
- Pure reasoning tasks
GrokxAI · 4.6
Agentic coding with tool use, especially inside xAI's own tooling
Reach for it when- Agent workflows leaning hard on tool calls
- Working inside Grok Build or xAI's own surfaces
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- GPT-5.6 Sol vs GrokSol is the safer default and scores higher overall; Grok 4.6 matches it on some agentic work at a fraction of the short-context price.
- Claude Sonnet vs Gemini ProA tier-crossing comparison people make on price.