# Microsoft-Decision-1 vs OpenAI Decisions API (slim)

> OpenAI Decisions scores 71.5 (BB) to Microsoft-Decision-1's 39 (E) for decision models. Microsoft-Decision-1 is cheaper for decision models, $0 against $0.10 per 1M tokens. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/microsoft-decision-1-vs-openai-decisions-api.md (~2,850 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/microsoft-decision-1-vs-openai-decisions-api.json · canonical https://www.anchorterminal.com/compare/microsoft-decision-1-vs-openai-decisions-api
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-10

OpenAI Decisions API scores 71.5 (BB) on agent readiness against Microsoft-Decision-1's 39 (E), and leads in every scored category. Both do decision models. Microsoft-Decision-1 is cheaper for decision models, $0 against $0.10 per 1M tokens.

- Microsoft-Decision-1: E 39, rank #921 of 954 · https://www.anchorterminal.com/tools/microsoft-decision-1.min.md
- OpenAI Decisions API: BB 71.5, rank #123 of 954 · https://www.anchorterminal.com/tools/openai-decisions-api.min.md
- Microsoft-Decision-1, good for Routing, classification, prioritisation and rubric checks over text, where a fixed set of options and a low price per token matter more than generated text. Also Cheaper for decision models, $0 against $0.10 per 1M tokens.
- OpenAI Decisions API, good for High-volume yes or no checks, routing among fixed options and rubric scoring over text and images, for teams already on an OpenAI key. Ahead on Reliability, 53 against 30; Schema & documentation, 89 against 43; Agent ergonomics, 87 against 50; Security & auth, 83 against 52; Payments & pricing, 30 against 20; Maintenance & community, 77 against 40; Transparency & trust, 83 against 32. Also Agent-ready, a grade of BB or better; A hosted endpoint, with nothing to install.

| Category | Microsoft-Decision-1 | OpenAI Decisions API |
| --- | --- | --- |
| Reliability (16%) | 30 | 53 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 43 | 89 |
| Agent ergonomics (13%) | 50 | 87 |
| Security & auth (14%) | 52 | 83 |
| Payments & pricing (10%) | 20 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 40 | 77 |
| Transparency & trust (7%) | 32 | 83 |

| Fact (where they differ) | Microsoft-Decision-1 | OpenAI Decisions API |
| --- | --- | --- |
| Vendor | Microsoft | OpenAI |
| Hosted endpoint | no (local only) | `https://api.openai.com/v1/decisions` |
| Auth | OAuth or key | API key |
| Price for decision models | free | $0.10 per 1M tokens |
| Licence | Not stated. The announcement and OpenRouter's model page name no licence, and no weights repository was found. | Proprietary service under OpenAI's services agreement. The official SDKs are Apache-2.0 |
| llms.txt | no | yes |
| Last release | 2026-10-09 | 2026-10-06 |
| Terms last updated | no document linked | 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 |
| Popularity | none | 32k stars |