StepFun: Step 3.7 Flash vs Xiaomi: MiMo-V2.5
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| StepFun: Step 3.7 Flash | Xiaomi: MiMo-V2.5 | |
|---|---|---|
| Vendor | stepfun | xiaomi |
| Quality Score | 100 | 100 |
| Benchmark Score | 50.8 | - |
| Input Price | $0.20/M | $0.40/M |
| Output Price | $1.15/M | $2.00/M |
| Context Window | 262,144 | 1,000,000 |
| Max Output | 230,400 | 65,536 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | - | ✓ |
| Benchmark Scores | ||
| ai_index | 49.9 | - |
| ai_index_agentic | 35.5 | - |
| ai_index_coding | 65.3 | - |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Step 3.7 Flash costs $0.49 and MiMo-V2.5 costs $0.90, so Step 3.7 Flash is about 1.8 times cheaper for the same work.
MiMo-V2.5 reads up to 1,000,000 tokens at once, roughly 1,500 pages of text, against about 393 pages for Step 3.7 Flash.
Only MiMo-V2.5 offers audio input.
Across the 20 tasks where they differ, Step 3.7 Flash scores higher on 19 (SQL Generation, Code Review, Code Refactoring and others), MiMo-V2.5 on 1 (Code Completion).
Step 3.7 Flash was released in May 2026 and MiMo-V2.5 in April 2026.
Pick Step 3.7 Flash if you need lower cost or the stronger all-round task scores; pick MiMo-V2.5 if you need long documents 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 | StepFun: Step 3.7 Flash | Xiaomi: MiMo-V2.5 |
|---|---|---|
| SQL Generation | 153 | 133 |
| Code Review | 146 | 132 |
| Code Completion | 130 | 131 |
| Code Refactoring | 144 | 136 |
| Bug Fixing | 155 | 136 |
| Unit Test Generation | 139 | 124 |
| Code Documentation | 133 | 131 |
| Regex Writing | 129 | 119 |
| CI/CD Pipelines | 131 | 120 |
| Frontend Component Design | 136 | 122 |
| Data Analysis | 150 | 124 |
| CSV / Spreadsheet Cleanup | 141 | 133 |
| ETL Scripting | 137 | 128 |
| JSON Extraction | 142 | 131 |
| Bulk Data Labeling | 133 | 129 |
| OCR / Document Parsing | 138 | 131 |
| Table Extraction from PDFs | 138 | 131 |
| Long-Document Summarization | 142 | 137 |
| Short-Form Summarization | 128 | 123 |
| Blog Post Writing | 129 | 121 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →