Meta: Muse Ember vs StepFun: Step 5 Preview
Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-11-12.
| Meta: Muse Ember | StepFun: Step 5 Preview | |
|---|---|---|
| Vendor | meta | stepfun |
| Quality Score | 100 | 100 |
| Benchmark Score | 56.7 | 43.5 |
| Input Price | $0.10/M | $1.00/M |
| Output Price | $0.50/M | $2.70/M |
| Context Window | 1,048,576 | 1,000,000 |
| Max Output | 943,718 | 64,000 |
| Tool Calling | ✓ | ✓ |
| Structured Output | ✓ | ✓ |
| Reasoning Mode | ✓ | ✓ |
| Vision | ✓ | ✓ |
| Audio | ✓ | - |
| Benchmark Scores | ||
| ai_index | 59.4 | 47.1 |
The verdict
For a sample job of 1 million input tokens and 250,000 output tokens, Muse Ember costs $0.23 and Step 5 Preview costs $1.68, so Muse Ember is about 7.4 times cheaper for the same work.
Both take in a similar amount of text: 1,048,576 and 1,000,000 tokens, about 1,573 and 1,500 pages.
Only Muse Ember offers audio input.
On our blended benchmark score Muse Ember leads 56.7 to 43.5.
Across the 20 tasks where they differ, Muse Ember scores higher on 20 (SQL Generation, Code Review, Code Completion and others).
Muse Ember was released in November 2026 and Step 5 Preview in October 2026.
Pick Muse Ember if you need lower cost, audio input, benchmark performance 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 | Meta: Muse Ember | StepFun: Step 5 Preview |
|---|---|---|
| SQL Generation | 141 | 139 |
| Code Review | 143 | 140 |
| Code Completion | 133 | 120 |
| Code Refactoring | 145 | 143 |
| Bug Fixing | 147 | 144 |
| Unit Test Generation | 131 | 129 |
| Code Documentation | 137 | 135 |
| Regex Writing | 125 | 124 |
| CI/CD Pipelines | 127 | 125 |
| Frontend Component Design | 129 | 127 |
| Data Analysis | 132 | 131 |
| CSV / Spreadsheet Cleanup | 136 | 135 |
| ETL Scripting | 136 | 134 |
| JSON Extraction | 131 | 123 |
| Bulk Data Labeling | 129 | 120 |
| OCR / Document Parsing | 134 | 133 |
| Table Extraction from PDFs | 134 | 133 |
| Long-Document Summarization | 147 | 145 |
| Short-Form Summarization | 126 | 117 |
| Blog Post Writing | 129 | 127 |
Scores reflect capability match + benchmark data + pricing for each task. Methodology →