NewModelHubPlan Your Free Volume
Audio minutes use about 800 characters per minute of English speech — an estimate that varies by language, voice, and pace. There is no published monthly cap on Turbo Free; the per-minute limit and shared capacity are the binding constraints.
Your Estimate
Cost on Turbo Free (through Nov 30, 2026): $0.00
Same volume on paid Turbo ($4 / 1M chars): $70.40
Free period ends November 30, 2026.
HeyGen Voice Rates & Turbo Free Limits
| Model | Price | Notes |
|---|---|---|
| heygen-voice-1-turbo-free | $0 until Nov 30, 2026 | No credit balance needed |
| heygen-voice-1-turbo (paid) | $4 per 1M characters | Per official announcement table |
| heygen-voice-1 (default) | $15 per 1M characters | Per official announcement table |
| Turbo Free limit | Value |
|---|---|
| Requests per minute (per endpoint, per workspace member) | 30 (default; accounts may differ) |
| Shared capacity | 429 possible even below your own limit |
| Voices supported | Public voices + instant clones (no professional clones) |
| Sync endpoint | POST /v3/models/audio/tts → 44.1 kHz mono WAV URL |
| Streaming endpoint | POST /v3/models/audio/tts/stream → SSE audio parts |
| Availability / latency guarantee | None (best effort) |
Rates and limits from HeyGen's official developer docs (developers.heygen.com/docs/voices/heygen-voice-speech) and official announcement (heygen.com/blog/heygen-voice-turbo, updated October 21, 2026), verified October 25, 2026 (Asia/Shanghai). Note the sourcing split: the $4/$15 per-1M-character figures come from the announcement comparison table — the developer docs page itself lists no per-character price. A free request never switches to a paid model automatically; paid Turbo needs a separate request with model heygen-voice-1-turbo.
Planning Tips
- Front-load before November 30. Every character synthesized on Turbo Free is $0; the same volume costs $4 per 1M characters on paid Turbo afterward. Batch your backlog into the free window.
- Stay under 30 requests per minute per endpoint — and expect 429s anyway. Shared capacity means a 429 can hit even below your own limit: honor Retry-After headers, otherwise back off exponentially, and never retry in a tight loop.
- Use longer requests, not more requests. One 4,000-character request consumes one slot of your 30/min budget; forty 100-character requests consume forty. Chunk scripts into fewer, larger requests where latency allows.
- Keep professional clones off Turbo Free. They are not supported and return an error — use the default heygen-voice-1 model for professional clones, at $15 per 1M characters.
- Free never bills you by accident. A Turbo Free request never switches to a paid model mid-flight, so a runaway script costs retries, not money — but it can still burn your free window on 429s.
Related tools
FAQ
How long is HeyGen Voice Turbo Free?
Turbo Free (model heygen-voice-1-turbo-free) is free through November 30, 2026, per HeyGen's official announcement. It requires no credit balance, and HeyGen says it will give advance notice before the terms change.
What are the HeyGen Voice Turbo Free limits?
Each endpoint allows 30 requests per minute per workspace member by default. All Turbo Free users also share limited capacity, so you can receive HTTP 429 even below your own limit. Availability, response time, and time to first audio are not guaranteed.
Which voices work with Turbo Free?
Public voices and HeyGen Voice 1 instant clones. Professional clones are not supported on Turbo Free; using one returns an error. Professional clones require the default heygen-voice-1 model.
What does HeyGen Voice Turbo cost after November 30, 2026?
Paid Turbo (model heygen-voice-1-turbo) is listed at $4 per 1M characters in HeyGen's official announcement comparison table. The developer docs page itself lists no per-character price. A free request never switches to a paid model automatically; paid Turbo requires a separate request.
Is this an official HeyGen tool?
No. It is an unofficial, fan-made estimator. HeyGen's invoice and official docs are authoritative. Audio-minute figures are estimates (about 800 characters per minute of English speech) and vary by language and pace.
Methodology & sources: rates and limits verified against HeyGen's official developer docs and official announcement on October 25, 2026 (Asia/Shanghai) — https://developers.heygen.com/docs/voices/heygen-voice-speech and https://www.heygen.com/blog/heygen-voice-turbo. Estimates exclude taxes and reseller markups. Your invoice follows metered usage.