Eleven v4 vs Eleven v4 Turbo: Mana yang Harus Anda Pilih?
Here’s a concise, practical comparison and model-picking guide.
Voice quality
- v4: Highest naturalness and timbre fidelity; better long-form stability, nuanced prosody, fewer artifacts at slower synthesis speeds.
- v4 Turbo: Very good and production-ready, but slightly less natural at extreme speed/low-latency settings; occasional minor artifacts compared to v4.
Latency
- v4: Higher TTFT and overall latency; best for batch or non-interactive playback. Streaming works but isn’t tuned for ultra-low latency turns.
- v4 Turbo: Optimized for real-time; low TTFT and fast token-to-audio, designed for conversational turn-taking and interruptions.
API pricing
- v4: Higher per-character/minute rate.
- v4 Turbo: Lower cost per output unit; typically the cost-efficient choice for high-volume or always-on agents.
- Note: Exact rates vary by plan/region—check your dashboard or pricing page.
Streaming
- v4: Supports streaming playback; good for progressive delivery of long content but not ideal for sub-300 ms turn targets.
- v4 Turbo: Real-time streaming with partial audio chunks; strong for barge-in and quick backchannels in interactive use.
CometAPI access
- v4: Limited or not optimized for Comet real-time endpoints.
- v4 Turbo: Full/primary support for Comet-style low-latency streaming and event-driven playback.
Choose the right model
Use v4 when:
- Highest voice fidelity is the top priority (narration, audiobooks, trailers, branded content).
- You can tolerate higher latency (pre-render, batch jobs, non-interactive playback).
- Long-form script stability and prosody nuance matter more than speed.
Use v4 Turbo when:
- You’re building interactive agents, IVR, live assistants, or any voice UX with tight latency budgets.
- You need cost efficiency at scale without sacrificing too much quality.
- You rely on real-time streaming, barge-in, quick turn-taking, and CometAPI endpoints.
Practical routing tips
- For dynamic agents: default to v4 Turbo. Enable streaming with small chunking and immediate playback.
- For content pipelines: default to v4. Pre-render and quality-check before distribution.
- Hybrid: route short, interactive responses to v4 Turbo; route long, polished monologues or final takes to v4.
