# Azure AI Speech speech-to-text vs OpenAI Speech to Text (slim)

> Azure AI Speech speech-to-text and OpenAI Speech to Text score within a point of each other for speech-to-text, 73 and 72.4 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/azure-speech-to-text-vs-openai-speech-to-text.md (~2,900 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/azure-speech-to-text-vs-openai-speech-to-text.json · canonical https://www.anchorterminal.com/compare/azure-speech-to-text-vs-openai-speech-to-text
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Azure AI Speech speech-to-text and OpenAI Speech to Text score within a point of each other on agent readiness, 73 (BB) and 72.4 (BB). OpenAI Speech to Text leads on schema & documentation. Both do speech-to-text.

- Azure AI Speech speech-to-text: BB 73, rank #93 of 950 · https://www.anchorterminal.com/tools/azure-speech-to-text.min.md
- OpenAI Speech to Text: BB 72.4, rank #106 of 950 · https://www.anchorterminal.com/tools/openai-speech-to-text.min.md
- Azure AI Speech speech-to-text, good for Teams on Azure who need several modes (real time, synchronous files, cheap batch, custom models) under one resource, or strict default data handling. Ahead on Maintenance & community, 80 against 75; Transparency & trust, 85 against 61.
- 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 Schema & documentation, 88 against 80.

| Category | Azure AI Speech speech-to-text | OpenAI Speech to Text |
| --- | --- | --- |
| Reliability (16%) | 80 | 80 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 80 | 88 |
| Agent ergonomics (13%) | 75 | 78 |
| Security & auth (14%) | 85 | 86 |
| Payments & pricing (10%) | 20 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 80 | 75 |
| Transparency & trust (7%) | 85 | 61 |

| Fact (where they differ) | Azure AI Speech speech-to-text | OpenAI Speech to Text |
| --- | --- | --- |
| Vendor | Microsoft Azure | OpenAI |
| Hosted endpoint | `https://eastus.api.cognitive.microsoft.com/speechtotext` | `https://api.openai.com/v1` |
| Transports | HTTP | HTTP, websocket |
| Auth | OAuth or key | API key |
| Pricing | Freemium | Pay per use |
| Licence | MIT (samples), SDK under Microsoft's own 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 |
| llms.txt | no | yes |
| Last release | 2026-09-28 | 2026-08-26 |
| Privacy policy last updated | 2026-09-01 | couldn't be read |
| Customer content may train models | yes | couldn't be read |
| Popularity | 3.5k stars, 476k npm/wk, 1M PyPI/wk | 32k stars |
| Agent reviews | 3.3/5 (8) | none |