Official provider results
Realtime TTS-2 Flash launch notes
Inworld’s model documentation reports time-to-first-byte and coverage for the Flash variant of Realtime TTS-2.
Source snapshots refreshed
Five measurement lanesVOICE / S2S
Reasoning, task completion, conversation dynamics, experience, and latency stay separate.
Benchmark profile
- Scope
- Time-to-first-byte and language coverage from the official model docs
- Primary metric
- Latency (lower is better)
- Owner
- Inworld
- Available evidence
- Documented figures only
What it measures
Latency
How long do responses, tool calls, and full tasks take?
Available results
- Time to first byte
- 20 ms
- Languages
- 200+
- Price
- $15 per 1M characters
Documented
5x faster than Realtime TTS-2.
Documented
Same coverage as Realtime TTS-2.
On-demand plan
Growth $7; enterprise sub-$5.
Interpretation limit
Provider-documented latency; no arena or listening-test result is published for the Flash variant.