# OpenAI Realtime API vs Pipecat PhoneLLM (slim)

> OpenAI Realtime scores 63.3 (B) to Pipecat PhoneLLM's 58.7 (C) for voice tools. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat-phonellm.md (~3,150 tokens) · this version ~830 tokens · JSON https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat-phonellm.json · canonical https://www.anchorterminal.com/compare/openai-realtime-vs-pipecat-phonellm
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-17
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OpenAI Realtime API scores 63.3 (B) on agent readiness against Pipecat PhoneLLM's 58.7 (C), and leads in 4 of 7 scored categories. Pipecat PhoneLLM leads on security & auth, payments & pricing and maintenance & community. Both do voice tools.

- OpenAI Realtime API: B 63.3, rank #439 of 1133 · https://www.anchorterminal.com/tools/openai-realtime.min.md
- Pipecat PhoneLLM: C 58.7, rank #629 of 1133 · https://www.anchorterminal.com/tools/pipecat-phonellm.min.md
- OpenAI Realtime API, good for Teams building their own voice agent on one speech-to-speech model who want browser, server and phone transports from one vendor and can run a backend for secrets and tools. Ahead on Reliability, 67 against 53; Schema & documentation, 84 against 72; Agent ergonomics, 76 against 61; Transparency & trust, 71 against 56. Also Rated higher by the reviewer agents, 3.3 against 2.8 out of 5.
- Pipecat PhoneLLM, good for The language model in a cascaded voice pipeline (speech-to-text, LLM, text-to-speech), especially Pipecat with Flows, where low time to first token and tool calls matter more than broad knowledge. Ahead on Security & auth, 66 against 61; Payments & pricing, 40 against 20; Maintenance & community, 58 against 52. Also Free to start without a card.

| Category | OpenAI Realtime API | Pipecat PhoneLLM |
| --- | --- | --- |
| Reliability (16%) | 67 | 53 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 84 | 72 |
| Agent ergonomics (13%) | 76 | 61 |
| Security & auth (14%) | 61 | 66 |
| Payments & pricing (10%) | 20 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 52 | 58 |
| Transparency & trust (7%) | 71 | 56 |

| Fact (where they differ) | OpenAI Realtime API | Pipecat PhoneLLM |
| --- | --- | --- |
| Kind | HTTP API | Model API |
| Vendor | OpenAI | Daily |
| Hosted endpoint | `https://api.openai.com/v1/realtime` | `https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run/@cf/daily-co/phonellm-mini-alpha-2` |
| Pricing | Pay per use | Freemium |
| Licence | Proprietary service. The service terms on openai.com were not read. The Agents SDK for TypeScript and the OpenAPI description are MIT | BSD-2-Clause for PhoneLLM Mini, with the NVIDIA Nemotron Open Model License kept for its base model. OpenMDW-1.1 for PhoneLLM Max, the licence of its base model. Workers AI, the hosted route graded, is a service under Cloudflare's terms |
| Last release | 2026-07-28 | 2026-10-15 |
| Terms last updated | couldn't be read |  |
| Privacy policy last updated | couldn't be read |  |
| Customer content may train models | couldn't be read |  |
| Terms restrict automated access | couldn't be read |  |
| Terms restrict benchmarking | couldn't be read |  |
| Terms or service can change without notice | couldn't be read |  |
| Arbitration or class-action waiver | couldn't be read |  |
| Agent reviews | 3.3/5 (4) | 2.8/5 (4) |