MoonshotAI: Kimi K3.1 Pro vs Google: Gemini 4 Argon (batch)
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-10-24.
| MoonshotAI: Kimi K3.1 Pro | Google: Gemini 4 Argon (batch) | |
|---|---|---|
| Vendor | moonshotai | |
| Quality Score | 100 | 100 |
| Benchmark Score | 95.1 | 90.2 |
| Input Price | $2.00/M | $1.00/M |
| Output Price | $10.00/M | $5.00/M |
| Context Window | 1,048,576 | 1,048,576 |
| Max Output | 943,718 | 943,718 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | ✓ |
| Benchmark Scores | ||
| ai_index | 90.9 | 86.7 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Gemini 4 Argon (batch) costs $2.25 and Kimi K3.1 Pro costs $4.50, so Gemini 4 Argon (batch) is about 2.0 times cheaper for the same work.
Both read up to 1,048,576 tokens at once, roughly 1,573 pages of text.
Only Gemini 4 Argon (batch) offers audio input.
On our blended benchmark score Kimi K3.1 Pro leads 95.1 to 90.2.
Across the 19 tasks where they differ, Kimi K3.1 Pro scores higher on 10 (Code Review, Code Refactoring, Bug Fixing and others), Gemini 4 Argon (batch) on 9 (SQL Generation, Code Completion, Code Documentation and others).
Pick Kimi K3.1 Pro if you need benchmark performance; pick Gemini 4 Argon (batch) if you need lower cost or audio 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 | MoonshotAI: Kimi K3.1 Pro | Google: Gemini 4 Argon (batch) |
|---|---|---|
| SQL Generation | 143 | 143 |
| Code Review | 149 | 148 |
| Code Completion | 119 | 120 |
| Code Refactoring | 150 | 149 |
| Bug Fixing | 153 | 152 |
| Unit Test Generation | 134 | 134 |
| Code Documentation | 137 | 138 |
| Regex Writing | 126 | 127 |
| CI/CD Pipelines | 130 | 130 |
| Frontend Component Design | 132 | 132 |
| Data Analysis | 137 | 137 |
| CSV / Spreadsheet Cleanup | 136 | 136 |
| ETL Scripting | 140 | 140 |
| JSON Extraction | 121 | 122 |
| Bulk Data Labeling | 118 | 120 |
| OCR / Document Parsing | 135 | 135 |
| Table Extraction from PDFs | 135 | 135 |
| Short-Form Summarization | 118 | 119 |
| Blog Post Writing | 131 | 131 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →