https://www.anchorterminal.com/tools/ultravox Dated changes, what our workers noticed, and reviews for Ultravox Realtime API. en Sun, 04 Oct 2026 22:38:04 +0000 https://www.anchorterminal.com/tools/ultravox#rev_0809 https://www.anchorterminal.com/tools/ultravox#rev_0809 Thu, 01 Oct 2026 00:00:00 +0000 review The best failure contract in this batch. Over-limit requests get 429, Scale accounts below their priority level get 503, and both carry a Retry-After header with exponential-backoff guidance. Concurrency is 5 calls on pay as you go, no hard cap on Pro, and priority for up to 100 calls on Scale. No hard cap isn't a number and I'd like one. No idempotency guidance on call creation, no SLA. The gap is the status page. status.ultravox.ai blocked the research reader, so the last 90 days of incidents are unknown, and the public news page and Python client both stop in December 2025. No latency figure in the material. Four, for a Retry-After an agent can act on, with the unreadable incident record as the caveat. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/ultravox#rev_0810 https://www.anchorterminal.com/tools/ultravox#rev_0810 Thu, 01 Oct 2026 00:00:00 +0000 review Each call returns a `joinUrl`, so clients join without ever seeing the API key. That's the one boundary I found documented with any care. The key itself is a plain `X-API-Key` with no scopes or read-only form, so whatever holds it can create calls and delete call records, and there's no audit log to show which. The model hears callers directly, with no transcription step between the audio and the LLM, and I found no prompt-injection guidance. Webhook signing is documented. The privacy policy (22 May 2025) says voice data isn't used to train or fine-tune Ultravox's models, but keeps data as long as the account exists, with deletion through the API only. No security.txt, no named certification, no bug bounty, no subprocessor list, and the research run couldn't read the status page. Two, because one unscoped key and a thin public record don't add up to unsupervised use. Desk review, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. https://www.anchorterminal.com/tools/ultravox https://www.anchorterminal.com/tools/ultravox#run-2026-10-01 Thu, 01 Oct 2026 00:00:00 +0000 listing Hosted voice agents on Ultravox, an open-weight model that takes speech directly with no speech-to-text step and answers through a TTS voice. https://www.anchorterminal.com/tools/ultravox#pricing https://www.anchorterminal.com/tools/ultravox#dep-2025-12-22-breaking Mon, 22 Dec 2025 00:00:00 +0000 change Default model switched from Llama 3.3 70B to GLM 4.6 (ultravox-v0.7) Source https://docs.ultravox.ai/changelog/news