Gemini 3.1 Pro Preview Custom Tools is a variant of Gemini 3.1 Pro that improves tool selection behavior by preventing overuse of a general bash tool when more efficient third-party or user-defined functions are available. This specialized …
Model details →Google: Gemini 3.1 Pro Preview Custom Tools vs xAI: Grok 4.20 Multi-Agent Beta
xAI: Grok 4.20 Multi-Agent Beta wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
Grok 4.20 Multi-Agent Beta is a variant of xAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information across complex tasks…
Model details →Side-by-side comparison
| Capability | Google: Gemini 3.1 Pro Preview Custom Tools | xAI: Grok 4.20 Multi-Agent Beta | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 2M | 🏆 xAI: Grok 4.20 Multi-Agent Beta |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $2.00 | Tie |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $6.00 | 🏆 xAI: Grok 4.20 Multi-Agent Beta |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | — | 🏆 Google: Gemini 3.1 Pro Preview Custom Tools |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Google: Gemini 3.1 Pro Preview Custom Tools better than xAI: Grok 4.20 Multi-Agent Beta?
xAI: Grok 4.20 Multi-Agent Beta wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Google: Gemini 3.1 Pro Preview Custom Tools and xAI: Grok 4.20 Multi-Agent Beta?
Input: $2.00 vs $2.00 per 1M tokens. Output: $12.00 vs $6.00 per 1M tokens.
What context windows do Google: Gemini 3.1 Pro Preview Custom Tools and xAI: Grok 4.20 Multi-Agent Beta support?
Google: Gemini 3.1 Pro Preview Custom Tools supports up to 1.0M tokens. xAI: Grok 4.20 Multi-Agent Beta supports up to 2M tokens.
Do both Google: Gemini 3.1 Pro Preview Custom Tools and xAI: Grok 4.20 Multi-Agent Beta support tool calling?
Google: Gemini 3.1 Pro Preview Custom Tools: yes. xAI: Grok 4.20 Multi-Agent Beta: not advertised.