Looking for an honest Google Gemini 1.5 Pro vs xAI Grok 3.5 comparison in 2026? We scored both ai language models on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. In our overall scoring the xAI Grok 3.5 comes out ahead 70/100 to 76/100 — a 6-point gap. The widest gap is in battery life, where the Google Gemini 1.5 Pro pulls noticeably ahead.
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xAI Grok 3.5 narrowly beats the Google Gemini 1.5 Pro in the ai language models category, especially in design, scoring 76 vs 70. If you want the better overall ai language models, xAI Grok 3.5 is the recommended choice.
Scores are relative within the ai language modelscategory. Percentages show each dimension's weight in the overall score. A difference of less than 0.5 points is considered a tie.
✓ Pros
✗ Cons
✓ Pros
✗ Cons
Lower cost = better value. Free = open-source self-hosted.
| Metric | 1.5 Pro | Grok 3.5 |
|---|---|---|
| Input (Prompt) | ✓$1.25/1M | $3.00/1M |
| Output (Completion) | ✓$5.00/1M | $15.00/1M |
| Open Source | Proprietary | Proprietary |
Context Window (tokens)
| Metric | 1.5 Pro | Grok 3.5 |
|---|---|---|
| Max Output | 8,192 tok | ✓16,384 tok |
| Speed | ✓110 tok/s | 85 tok/s |
| Time to First Token | 700ms | ✓600ms |
| Languages | 40+ | 40+ |
Higher is better. Industry-standard AI evaluation benchmarks.
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| Feature | 1.5 Pro | Grok 3.5 |
|---|---|---|
| Reasoning / Chain-of-Thought | ✕ | ✓ |
| Vision (Image Input) | ✓ | ✓ |
| Audio Input | ✓ | ✕ |
| Video Input | ✓ | ✕ |
| Image/Audio Output | ✕ | ✕ |
| Function Calling / Tools | ✓ | ✓ |
| JSON Mode | ✓ | ✓ |
| Real-time Web Access | ✕ | ✓ |
| Fine-tuning Support | ✕ | ✕ |
| Batch API | ✓ | ✕ |
| Streaming | ✓ | ✓ |
| Open Source | ✕ | ✕ |
| Field | 1.5 Pro | Grok 3.5 |
|---|---|---|
| Provider | xAI | |
| Knowledge Cutoff | 2023-11 | 2025-07 |
| Best For | long contextdocument analysisvideogeneral | reasoningcodingreal time infomath |
Buy Google Gemini 1.5 Pro if…
Choose the Google Gemini 1.5 Pro if budget is your top priority — it offers competitive specs at a lower price point.
Buy xAI Grok 3.5 if…
Buy the xAI Grok 3.5 if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
xAI Grok 3.5 narrowly beats the Google Gemini 1.5 Pro in the ai language models category, especially in design, scoring 76 vs 70. If you want the better overall ai language models, xAI Grok 3.5 is the recommended choice.
No, xAI Grok 3.5 scores higher (75 vs 75).
Check the latest prices using the buy links above.
Choose the Google Gemini 1.5 Pro if budget is your top priority — it offers competitive specs at a lower price point.
Buy the xAI Grok 3.5 if you want the best performance in this comparison. It scores higher overall and is the recommended choice for most buyers.
Reviewed by VersusMatrix Editorial Team
Last updated: April 25, 2026
Methodology: AI-powered analysis of technical specifications from manufacturer data. Scores are calculated by comparing products across multiple dimensions and normalized relative to the full category database. Our editorial process is independent and not influenced by affiliate partnerships.