Heuristic:Elevenlabs Elevenlabs python Client Timeout Configuration
| Knowledge Sources | |
|---|---|
| Domains | Optimization, API_Client |
| Last Updated | 2026-02-15 12:00 GMT |
Overview
The ElevenLabs SDK defaults to a 240-second (4-minute) HTTP timeout, which is unusually high to accommodate long audio generation tasks.
Description
The ElevenLabs SDK sets a default HTTP timeout of 240 seconds for all API requests. This is significantly higher than typical SDK defaults (30-60 seconds) because TTS generation for long texts, voice cloning operations, and batch speech-to-text transcription can take considerable time. Users can override this via the `timeout` parameter or by passing a custom `httpx.Client` with their own timeout configuration. When a custom httpx client is provided, the SDK respects its existing timeout rather than overriding it.
Usage
Use this heuristic when experiencing timeout errors on long operations or when you need to tune performance for your specific use case. Short text TTS calls complete quickly, but long-form audio generation or batch processing may approach the 240s limit.
The Insight (Rule of Thumb)
- Default timeout: 240 seconds (4 minutes). This is intentionally high.
- For short TTS: Consider lowering to 30-60 seconds to fail faster on network issues.
- For long-form audio: The 240s default is appropriate. Increase to 600s+ for very long texts.
- Custom httpx client: When you pass your own `httpx.Client`, the SDK uses its timeout as-is. This allows full control over connect, read, write, and pool timeouts.
- Trade-off: Lower timeouts detect network problems faster but risk aborting legitimate long operations.
Reasoning
ElevenLabs TTS generates audio server-side before streaming the response. For long texts (e.g., book chapters, podcasts), generation can take over 60 seconds. A standard 30-second timeout would fail on these legitimate requests. The 240-second default provides headroom while still eventually failing on truly stalled connections.
The conditional timeout logic (`timeout if timeout is not None else 240 if httpx_client is None else httpx_client.timeout.read`) ensures that:
- Explicit `timeout=X` always wins
- Without explicit timeout, default to 240s for the built-in client
- With a custom httpx client, respect the user's existing configuration
Code Evidence
Default timeout in `client.py:51`:
timeout: typing.Optional[float] = 240,
Timeout defaulting logic in `base_client.py:91-93`:
_defaulted_timeout = (
timeout if timeout is not None else 240 if httpx_client is None else httpx_client.timeout.read
)
Timeout documentation in `base_client.py:63`:
timeout : typing.Optional[float]
The timeout to be used, in seconds, for requests. By default the timeout is 240 seconds,
unless a custom httpx client is used, in which case this default is not enforced.