Decision Workspace
spectracost vs cachebench vs umf
Side-by-side comparison of Rust crates
44
spectracost
experimentalv0.1.0
AI cost observability SDK - see the full spectrum of your AI spend
47
cachebench
experimentalv0.1.0
Prompt-cache observability for LLM APIs. Per-call hit ratio, cost saved, regression alerts. Anthropic, OpenAI, Bedrock.
66
umf
experimentalv0.2.6
Universal Message Format (UMF) - Provider-agnostic message representation for LLM interactions with ChatML formatting, internal hub model, and MCP support
Core Metrics
| spectracost | cachebench | umf | |
|---|---|---|---|
| Health Score | 44 | 47 | 66 |
| Total Downloads | 16 | 13 | 910 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 0 | 0 | 273 |
| Releases | 1 | 1 | 12 |
| Last Updated | 41d ago | 16d ago | 33d ago |
| Age | 1m | 16d | 6m |
Health Breakdown
spectracost
Maintenance
10
Quality
12
Community
6
Popularity
1
Documentation
15
cachebench
Maintenance
12
Quality
13
Community
6
Popularity
1
Documentation
15
umf
Maintenance
18
Quality
16
Community
13
Popularity
4
Documentation
15
Technical Details
| spectracost | cachebench | umf | |
|---|---|---|---|
| Version | 0.1.0 | 0.1.0 | 0.2.6 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT | MIT | MIT OR Apache-2.0 |
| Dependencies | 9 | 5 | 6 |
| Crate Size | 23KB | 10KB | 36KB |
| Features | 0 | 0 | 7 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2021 |
| MSRV | 1.75 | 1.75 | 1.70 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •umf leads with a health score of 66/100, but none of the options score above 80.
- •umf is depended on by 273 crates — strongest ecosystem trust.