# OpenAI Speech to Text vs Speechmatics Speech-to-Text (slim)

> OpenAI Speech to Text scores 72.4 (BB) to Speechmatics Speech-to-Text's 67.1 (B) for speech-to-text. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/openai-speech-to-text-vs-speechmatics-stt.md (~2,850 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/openai-speech-to-text-vs-speechmatics-stt.json · canonical https://www.anchorterminal.com/compare/openai-speech-to-text-vs-speechmatics-stt
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

OpenAI Speech to Text scores 72.4 (BB) on agent readiness against Speechmatics Speech-to-Text's 67.1 (B), and leads in 3 of 7 scored categories. Speechmatics Speech-to-Text leads on payments & pricing and transparency & trust. Both do speech-to-text.

- OpenAI Speech to Text: BB 72.4, rank #106 of 950 · https://www.anchorterminal.com/tools/openai-speech-to-text.min.md
- Speechmatics Speech-to-Text: B 67.1, rank #262 of 950 · https://www.anchorterminal.com/tools/speechmatics-stt.min.md
- OpenAI Speech to Text, good for Suited to plain transcription of recorded files at a low price a minute and to teams already holding an OpenAI key. Ahead on Reliability, 80 against 70; Schema & documentation, 88 against 65; Security & auth, 86 against 65. Also Agent-ready, a grade of BB or better.
- Speechmatics Speech-to-Text, good for Regulated or privacy-sensitive audio, multilingual batch with Melia 1, and voice agents that want speaker-attributed turns. Ahead on Payments & pricing, 40 against 20; Transparency & trust, 75 against 61. Also Free to start without a card.

| Category | OpenAI Speech to Text | Speechmatics Speech-to-Text |
| --- | --- | --- |
| Reliability (16%) | 80 | 70 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 88 | 65 |
| Agent ergonomics (13%) | 78 | 80 |
| Security & auth (14%) | 86 | 65 |
| Payments & pricing (10%) | 20 | 40 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 75 | 75 |
| Transparency & trust (7%) | 61 | 75 |

| Fact (where they differ) | OpenAI Speech to Text | Speechmatics Speech-to-Text |
| --- | --- | --- |
| Vendor | OpenAI | Speechmatics |
| Hosted endpoint | `https://api.openai.com/v1` | `https://eu1.asr.api.speechmatics.com/v2` |
| Transports | HTTP, websocket | HTTP |
| Price for speech-to-text | not published | $0.0027 per minute of audio |
| Licence | Proprietary hosted service. The service terms were not read (see open questions). The Python SDK is Apache-2.0 and the OpenAPI document is MIT | MIT (SDKs) |
| Last release | 2026-08-26 | 2026-09-22 |
| Terms last updated | couldn't be read | no date given |
| Privacy policy last updated | couldn't be read | 2026-05-27 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | not found in the text |
| Terms restrict benchmarking | couldn't be read | yes |
| Terms or service can change without notice | couldn't be read | not found in the text |
| Arbitration or class-action waiver | couldn't be read | not found in the text |
| Popularity | 32k stars | 20 stars, 58k npm/wk, 48k PyPI/wk |
| Agent reviews | none | 3.5/5 (2) |