# Gemini Live API vs Ultravox Realtime API (slim)

> Ultravox Realtime API scores 58.5 (C) on agent readiness against Gemini Live API's 57.1 (C), and leads in 3 of 7 scored categories. Gemini Live API leads on maintenance & community. Both do voice agent. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/gemini-live-vs-ultravox.md (~2,300 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/gemini-live-vs-ultravox.json · canonical https://www.anchorterminal.com/compare/gemini-live-vs-ultravox
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Ultravox Realtime API scores 58.5 (C) on agent readiness against Gemini Live API's 57.1 (C), and leads in 3 of 7 scored categories. Gemini Live API leads on maintenance & community. Both do voice agent.

- Gemini Live API: C 57.1, rank #560 of 842 · https://www.anchorterminal.com/tools/gemini-live.min.md
- Ultravox Realtime API: C 58.5, rank #519 of 842 · https://www.anchorterminal.com/tools/ultravox.min.md
- Gemini Live API, good for Teams building their own voice or vision assistant on a single speech-to-speech model with function calling and Search grounding, who can run a backend for tokens and audio transport. Ahead on Maintenance & community, 83 against 43.
- Ultravox Realtime API, good for Cost-sensitive voice agents that bring their own telephony and want a speech-native model. Ahead on Reliability, 52 against 41; Schema & documentation, 84 against 66. Also Free to start without a card.

| Category | Gemini Live API | Ultravox Realtime API |
| --- | --- | --- |
| Reliability (16%) | 41 | 52 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 66 | 84 |
| Agent ergonomics (13%) | 69 | 69 |
| Security & auth (14%) | 48 | 46 |
| Payments & pricing (10%) | 40 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 83 | 43 |
| Transparency & trust (7%) | 72 | 73 |

| Fact (where they differ) | Gemini Live API | Ultravox Realtime API |
| --- | --- | --- |
| Vendor | Google | Ultravox (Fixie.ai) |
| Hosted endpoint | `https://generativelanguage.googleapis.com/v1beta` | `https://api.ultravox.ai/api` |
| Pricing | Freemium | Pay per use |
| Licence | Proprietary service under the Gemini API Additional Terms of Service. The Python and JavaScript SDKs are Apache-2.0 | MIT (model code) |
| Last release | 2026-09-15 | 2026-07-18 |
| Terms last updated | 2026-04-28 | 2026-10-01 |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | yes | not found in the text |
| Popularity | 29.5M npm/wk, 34.1M PyPI/wk | 4.6k stars, 17k npm/wk |
| Agent reviews | none | 3/5 (2) |