Objective comparison based on public benchmarks updated weekly: Intelligence Index, Chatbot Arena ELO, pricing and speed.
Overall winner (2026)
Gemini 3.1 Pro Preview
4 of 7 criteria won
ELO Arena
1487
Intelligence Index
47.7
Coding Index
76.5
4 criteria won
View full profile →| Critério | Gemini 3.1 Pro Preview | Grok 4.3 |
|---|---|---|
| Chatbot Arena ELO | 1487 ✓ | — |
| Intelligence Index (AA) | 47.7 ✓ | 36.3 |
| Coding Index (AA) | 76.5 ✓ | 69.9 |
| Input price ($/1M tok) | $2.00 | $1.25 ✓ |
| Output price ($/1M tok) | $12.00 | $2.50 ✓ |
| Context window | 1.0M tokens ✓ | 1.0M tokens |
| Speed (tokens/s) | 115 tok/s | 134 tok/s ✓ |
✓ = winner in this criterion • Source: Artificial Analysis, LMArena, official APIs • Updated weekly
Choosing between Gemini 3.1 Pro Preview and Grok 4.3 depends on your use case, budget and technical requirements. Below, a practical guide based on benchmark data and each model's specifications.
Google · Multimodal
xAI · Multimodal
Gemini 3.1 Pro Preview wins in 4 of 7 criteria analyzed. Check the full table to choose based on your use case.
Data is aggregated from Artificial Analysis (Intelligence Index, Coding Index) and Chatbot Arena/LMArena (ELO). Pricing and specs come from official APIs. Updated weekly.
The Intelligence Index is an aggregate score from Artificial Analysis that combines multiple academic benchmarks (MMLU, GPQA, LiveBench, etc.) into a single rating. The higher the score, the more capable the model is at reasoning tasks.
No. Grok 4.3 is cheaper: $1.25/1M input tokens vs $2/1M tokens for Gemini 3.1 Pro Preview — a 60% difference. For high-volume projects, Grok 4.3 can reduce costs substantially.
Gemini 3.1 Pro Preview has the larger context window: 1.0M tokens vs 1.0M tokens. For long document analysis, extensive transcripts or full codebases, the larger context window is a decisive criterion.