Native extraction
61 English segments returned from a public captioned fixture.
YouTube transcript reliability, measured in public.
Capslane publishes the test set, environment, versions and failures behind every reliability claim. The current result is an initial operational check, not a market-wide benchmark.
Published2 September 2026
ScopeInitial operational validation
Public fixtures2
Verified paths
These checks were executed on the deployed architecture. Broader success-rate claims will appear only after the versioned corpus is complete.
Passed
Native cache
The repeated request was returned from the shared cache in 39 ms.
Generated transcript
A captionless public fixture completed through download, processing and persistence.
Native isolation
Native extraction remained available while the generated worker was active.
Reproduce the method.
The methodology defines the video categories, cache rules, latency measurement and exclusions. The current aggregate result is available without republishing transcript content.