Gemini 3.1 Pro Preview vs Grok 4.20 Multi-Agent
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Quick verdict: which should you choose?
Choose Gemini 3.1 Pro Preview if you need
- ✓Choose Grok 4.20 Multi-Agent if you need up to 2M token contexts for massive document or file collections.
- ✓Choose Grok 4.20 Multi-Agent if you need multi-agent coordination for multi-step multimodal workflows.
- ✓Choose Grok 4.20 Multi-Agent if you need lower output pricing at $2.5 per million tokens.
- ✓Choose Grok 4.20 Multi-Agent if your tasks stay within text, image, and file modalities.
Choose Grok 4.20 Multi-Agent if you need
- ✓Choose Gemini 3.1 Pro Preview if you need native audio and video alongside text and images.
- ✓Choose Gemini 3.1 Pro Preview if you need documented high output speed of 122 t/s.
- ✓Choose Gemini 3.1 Pro Preview if you need a published intelligence index for benchmarking.
- ✓Choose Gemini 3.1 Pro Preview if your work involves large-scale multimodal document analysis with video.
Verdict
Grok 4.20 Multi-Agent leads on raw context length (2M tokens) and price ($2.5/M) while adding multi-agent coordination for complex workflows, whereas Gemini 3.1 Pro Preview offers measured speed (122 t/s), a published intelligence score, and broader native modalities including audio and video. Grok suits massive text-and-file tasks; Gemini fits integrated audio-visual analysis despite its higher cost and preview inconsistencies. Neither dominates every dimension given missing intelligence and speed data for Grok.
Gemini 3.1 Pro Preview vs Grok 4.20 Multi-Agent: side by side
| Spec | Gemini 3.1 Pro Preview | Grok 4.20 Multi-Agent | Winner |
|---|---|---|---|
| Intelligence | 46.5 | — | Tie |
| Output speed | 122 t/s | — | Tie |
| Output price | $12.00/1M | $2.50/1M | Grok 4.20 Multi-Agent |
| Context | 1049K | 2000K | Grok 4.20 Multi-Agent |
| Params | — | — | Tie |
| Provider | xAI | Tie |
Detailed analysis
Context Window
Winner: Grok 4.20 Multi-AgentGrok provides a 2M token context versus Gemini's 1M tokens. This gives Grok a clear edge for extremely long inputs while Gemini remains competitive for most large-scale tasks under 1M.
Pricing
Winner: Grok 4.20 Multi-AgentGrok lists output pricing at $2.5 per million tokens compared with Gemini at $12 per million. The fourfold cost difference favors Grok for high-volume usage.
Modalities Supported
Winner: Gemini 3.1 Pro PreviewGemini natively handles audio, image, video, and text while Grok supports text, images, and files but excludes audio and video. Gemini therefore covers a wider multimodal range.
Speed & Intelligence Data
Winner: Gemini 3.1 Pro PreviewGemini reports 122.18 tokens per second output speed and an intelligence index of 46.5; Grok supplies neither metric. Direct speed or intelligence comparisons are not possible from available facts.
Gemini 3.1 Pro Preview
Pros
- +Handles up to 1M token contexts
- +Native support for audio, image, video, and text
- +Strong integration of multiple modalities
Cons
- –Preview model may show inconsistent outputs
- –High resource use with maximum context
- –Requires verification on complex tasks
Grok 4.20 Multi-Agent
Pros
- +Supports extremely long contexts
- +Coordinates multiple agents for workflows
- +Handles text, images, and files natively
Cons
- –Multi-agent setups may add latency
- –Coordination overhead on simple tasks
- –No audio or video modalities
Summary: Gemini 3.1 Pro Preview vs Grok 4.20 Multi-Agent
Select Grok 4.20 Multi-Agent for maximum context, lower cost, and agent-based text/image workflows. Choose Gemini 3.1 Pro Preview when audio-video support and measured speed matter more than price or context size. The best pick depends on whether your priority is scale and cost or modality breadth.
Frequently asked questions
Neither is universally better; Grok leads in context length and price while Gemini leads in modality coverage and available speed data.