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Gradium
Gradium develops voice AI models for natural, expressive, low-latency voice interactions at scale.
For agents: Gradium: voice AI company with low-latency Text-to-Speech and Speech-to-Text APIs, Python SDK, streaming examples, voices and benchmark guides.
text-to-speechspeech-to-textvoice-ailow-latencypython-sdk
- Authority
- 51 reach 6 · trust 5 · quality 25 · freshness 15
- Tier
- listed
- llms.txt
- https://gradium.ai/llms.txt
- llms-full.txt
- https://gradium.ai/llms-full.txt
- Sections
- 4
- Links
- 102
- Size
- 35313 bytes
- Popularity rank
- #698627
- Country
- France
- Categories
- AI and machine learning · APIs and SDKs
- For agents
- Interface: a documented API or declared MCP endpoint an agent can call
- Inferred actions
- Read documentation Call an API About these labels
- Audience
- developers · agents can: read docs, call api · en
- First seen
- 2026-10-19T10:44:34.766Z
- Last checked
- 2026-10-21T12:41:25.801Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-21T12:41:22.456Z. Cached copy · Source on gradium.ai
# Gradium
> Gradium develops voice AI models for natural, expressive, low-latency voice interactions at scale.
Gradium provides Text-to-Speech, Speech-to-Text and speech-to-speech models built for real-time voice agents. This file indexes every published guide and blog post. The full text of each page is at https://gradium.ai/llms-full.txt.
Index generated 2026-10-21. Each entry carries the date its figures were last verified.
## Key resources
- [API documentation](https://docs.gradium.ai): endpoints, parameters and limits
- [Text to Speech](https://gradium.ai/text-to-speech): real-time text-to-speech with expressive voices
- [Speech to Text](https://gradium.ai/speech-to-text): streaming transcription with semantic turn detection
- [Voice Cloning](https://gradium.ai/voice-cloning): instant and pro voice clones
- [Live Translation](https://gradium.ai/live-translation): real-time speech translation between five languages, in the voice you choose
- [Pricing](https://gradium.ai/pricing): plans, credits and concurrency
- [Blog](https://gradium.ai/blog): research, engineering and product posts
- [Blog RSS feed](https://gradium.ai/blog/feed.xml)
- [Guides RSS feed](https://gradium.ai/content/feed.xml)
- [Studio](https://studio.gradium.ai/): voice playground and account management
- [Voices](https://gradium.ai/voices): the voice library, accents and the prompts that design a voice
- [Voice Designer](https://studio.gradium.ai/voices/design): generate an original voice from a description
## Guides, by topic
### Benchmarks
Independent and Gradium-run measurements of Text-to-Speech and Speech-to-Text latency and accuracy, each figure dated.
- [TTS Latency Benchmark 2026: Time to First Audio](https://gradium.ai/content/tts-latency-benchmark-2026) [hub]: TTS latency benchmark 2026: the Coval leaderboard on perceived time to first audio, with Gradium TTS at 214 ms median, September 2026. (last verified 2026-09-10)
- [Gradium vs ElevenLabs for Voice Agents: 2026 Benchmark](https://gradium.ai/content/gradium-vs-elevenlabs-voice-agents-benchmark): Gradium vs ElevenLabs, September 2026: Coval latency, three accuracy tests including an 81.0% hard-case pass rate, Elo and price per 1M characters. (last verified 2026-09-10)
- [STT API Benchmark 2026: Latency and Accuracy](https://gradium.ai/content/stt-api-benchmark-2026-latency-accuracy): Speech-to-Text for voice agents: time to first token against word error rate, why no public cross-vendor board exists, and how to run the test yourself. (last verified 2026-09-10)
- [TTS WER Benchmark 2026: Pronunciation Accuracy](https://gradium.ai/content/tts-wer-benchmark-2026): TTS WER benchmark 2026: Coval, a multilingual test set and an 81.0% hard-case pass rate, September 2026. Every figure dated and sourced. (last verified 2026-09-10)
### Choosing a Text-to-Speech API
Rankings, criteria frameworks and head-to-head comparisons for picking a Text-to-Speech provider.
- [Best Text-to-Speech APIs 2026: The Full Ranking
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| Domain | Title | Category | Country | Authority | llms.txt | llms-full.txt | Save |
|---|---|---|---|---|---|---|---|
| sourcey.com | Sourcey | interface AI and machine learning AI agents and MCP | 70 | ✓ | ✓ | ||
| gofrantic.com | Frantic | interface AI and machine learning AI agents and MCP | 61 | ✓ | |||
| intellweb.ai | Intellweb | documentation Ecommerce Productivity +3 | US | 61 | ✓ | ✓ | |
| agentwebmap.com | Agent Web Map | interface AI and machine learning AI agents and MCP +1 | FR | 60 | ✓ | ✓ | |
| cloudflare.com | Cloudflare | interface AI and machine learning Cybersecurity +1 | 85 | ✓ | ✓ | ||
| adobe.com | Adobe Tools | transactional AI and machine learning Design +1 | FR | 75 | ✓ | ||
| taboola.com | Taboola.com | documentation AI and machine learning Marketing | 75 | ✓ | ✓ | ||
| opera.com | The Opera browser overview | documentation Infrastructure AI and machine learning +2 | NL | 74 | ✓ |
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