StepFun: Step 3.7 Flash vs SpaceXAI: Grok Build 0.1
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-07.
| StepFun: Step 3.7 Flash | SpaceXAI: Grok Build 0.1 | |
|---|---|---|
| Vendor | stepfun | x-ai |
| Quality Score | 100 | 100 |
| Benchmark Score | 50.8 | - |
| Input Price | $0.20/M | $1.00/M |
| Output Price | $1.15/M | $2.00/M |
| Context Window | 262,144 | 256,000 |
| Max Output | 230,400 | 230,400 |
| 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 Grok Build 0.1 costs $1.50, so Step 3.7 Flash is about 3.1 times cheaper for the same work.
Both take in a similar amount of text: 262,144 and 256,000 tokens, about 393 and 384 pages.
Only Step 3.7 Flash offers video input.
Across the 20 tasks where they differ, Step 3.7 Flash scores higher on 20 (SQL Generation, Code Review, Code Completion and others).
Pick Step 3.7 Flash if you need lower cost, video input or the stronger all-round task scores.
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 | SpaceXAI: Grok Build 0.1 |
|---|---|---|
| SQL Generation | 153 | 130 |
| Code Review | 146 | 126 |
| Code Completion | 130 | 116 |
| Code Refactoring | 144 | 127 |
| Bug Fixing | 155 | 130 |
| Unit Test Generation | 139 | 121 |
| Code Documentation | 133 | 125 |
| Regex Writing | 129 | 119 |
| CI/CD Pipelines | 131 | 117 |
| Frontend Component Design | 136 | 122 |
| Data Analysis | 150 | 124 |
| CSV / Spreadsheet Cleanup | 141 | 127 |
| ETL Scripting | 137 | 122 |
| JSON Extraction | 142 | 123 |
| Bulk Data Labeling | 133 | 121 |
| OCR / Document Parsing | 138 | 128 |
| Table Extraction from PDFs | 138 | 128 |
| Long-Document Summarization | 142 | 129 |
| Short-Form Summarization | 128 | 115 |
| Blog Post Writing | 129 | 118 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →