Gemini 3.1 Pro vs Grok 4.3
How Gemini 3.1 Pro (Google) and Grok 4.3 (xAI) compare on price, context window and best-fit use case.
In short: Gemini 3.1 Pro is best for long-document and multimodal workloads, RAG over huge corpora, and Google Cloud-native apps, while Grok 4.3 suits reasoning and agentic tasks needing current/real-time info and low output costs. On price it's $2.00 (under 200K; $4.00 above) vs $1.25 ($0.20 cached) per 1M input tokens; on context, 2M tokens vs 1M tokens.
Verdict
Gemini 3.1 Pro is the more capable pick (Bq score 92 vs 88). Choose Grok 4.3 if budget leads: its input price is $1.25 ($0.20 cached) per 1M vs $2.00 (under 200K; $4.00 above).
| Spec | Gemini 3.1 Pro | Grok 4.3 |
|---|---|---|
| Developer | xAI | |
| Context window | 2M tokens | 1M tokens |
| Input price /1M | $2.00 (under 200K; $4.00 above) | $1.25 ($0.20 cached) |
| Output price /1M | $12.00 (under 200K; $18.00 above) | $2.50 |
| Modalities | text, image, audio, video | text, image |
| Best for | Long-document and multimodal workloads, RAG over huge corpora, and Google Cloud-native apps. | Reasoning and agentic tasks needing current/real-time info and low output costs. |
Gemini 3.1 Pro
- Largest mainstream context (2M)
- Strong multimodal reasoning
- Native Google ecosystem integration
- Competitive pricing
Grok 4.3
- Very competitive output pricing
- Configurable reasoning effort
- Real-time X and web search integration
- 1M context