SpaceXAI: Grok 4.3 vs Google: Gemma 4 31B
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| SpaceXAI: Grok 4.3 | Google: Gemma 4 31B | |
|---|---|---|
| Vendor | x-ai | |
| Quality Score | 100 | 100 |
| Benchmark Score | 58.6 | 53.7 |
| Input Price | $1.25/M | $0.20/M |
| Output Price | $2.50/M | $0.40/M |
| Context Window | 1,000,000 | 262,144 |
| Max Output | 900,000 | 16,384 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | - |
| Benchmark Scores | ||
| ai_index | 62.0 | 48.4 |
| ai_index_agentic | 39.8 | 23.8 |
| ai_index_coding | 69.7 | 71.7 |
| eqbench | - | 57.5 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Gemma 4 31B costs $0.30 and Grok 4.3 costs $1.88, so Gemma 4 31B is about 6.2 times cheaper for the same work.
Grok 4.3 reads up to 1,000,000 tokens at once, roughly 1,500 pages of text, against about 393 pages for Gemma 4 31B.
Only Gemma 4 31B offers video input.
On our blended benchmark score Grok 4.3 leads 58.6 to 53.7.
Across the 20 tasks where they differ, Grok 4.3 scores higher on 15 (SQL Generation, Code Review, Code Refactoring and others), Gemma 4 31B on 5 (Code Completion, Regex Writing, JSON Extraction and others).
Pick Grok 4.3 if you need long documents, benchmark performance or the stronger all-round task scores; pick Gemma 4 31B if you need lower cost or video input.
Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.
Who wins by task?
| Task | SpaceXAI: Grok 4.3 | Google: Gemma 4 31B |
|---|---|---|
| SQL Generation | 158 | 156 |
| Code Review | 155 | 152 |
| Code Completion | 120 | 131 |
| Code Refactoring | 155 | 151 |
| Bug Fixing | 164 | 160 |
| Unit Test Generation | 144 | 143 |
| Code Documentation | 139 | 137 |
| Regex Writing | 130 | 131 |
| CI/CD Pipelines | 136 | 135 |
| Frontend Component Design | 138 | 138 |
| Data Analysis | 153 | 152 |
| CSV / Spreadsheet Cleanup | 147 | 145 |
| ETL Scripting | 145 | 143 |
| JSON Extraction | 134 | 143 |
| Bulk Data Labeling | 124 | 133 |
| OCR / Document Parsing | 141 | 140 |
| Table Extraction from PDFs | 141 | 140 |
| Long-Document Summarization | 152 | 149 |
| Short-Form Summarization | 120 | 129 |
| Blog Post Writing | 134 | 133 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →