# Drex 1.5 vs SPEV (slim)

> Drex 1.5 scores 69.5 (B) to SPEV's 51.1 (D) for decision models. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/nace-drex-vs-sprag-spev.md (~2,700 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/nace-drex-vs-sprag-spev.json · canonical https://www.anchorterminal.com/compare/nace-drex-vs-sprag-spev
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-15
- Licence: CC BY 4.0, credit Anchor Terminal (anchorterminal.com) and link this page when you pass anything on

Drex 1.5 scores 69.5 (B) on agent readiness against SPEV's 51.1 (D), and leads in every scored category. Both do decision models.

- Drex 1.5: B 69.5, rank #191 of 1094 · https://www.anchorterminal.com/tools/nace-drex.min.md
- SPEV: D 51.1, rank #819 of 1094 · https://www.anchorterminal.com/tools/sprag-spev.min.md
- Drex 1.5, good for Routing, triage and yes or no gates inside an agent, where the caller supplies the options and acts on the probabilities. Suited to hosted use at a low per-token price, or to open weights where the licence fits. Ahead on Reliability, 80 against 45; Schema & documentation, 88 against 81; Agent ergonomics, 85 against 76; Security & auth, 65 against 33; Payments & pricing, 40 against 30; Maintenance & community, 65 against 49; Transparency & trust, 61 against 54.
- SPEV, good for Typed decisions over raw audio, such as end-of-turn detection, call triage and flagging, plus text and single images, hosted or self-hosted.

| Category | Drex 1.5 | SPEV |
| --- | --- | --- |
| Reliability (16%) | 80 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 88 | 81 |
| Agent ergonomics (13%) | 85 | 76 |
| Security & auth (14%) | 65 | 33 |
| Payments & pricing (10%) | 40 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 65 | 49 |
| Transparency & trust (7%) | 61 | 54 |

| Fact (where they differ) | Drex 1.5 | SPEV |
| --- | --- | --- |
| Vendor | Nace AI, Inc. (Nace.AI) | Sprag |
| Hosted endpoint | `https://console.nace.ai/v1/systemone` | `https://api.sprag.ai/v1/decisions` |
| Pricing | Freemium | Pay per use |
| Licence | Hosted API under the Nace AI Terms of Service, last updated 5 May 2026. Weights under the Nace AI Open RAIL-M licence (modified, version 1.0, October 2026), which is not an open-source licence. Businesses above $1 million in revenue or funding need a separate commercial licence, and competing products are excluded. The bundled code/kev package, derived from Jared Palmer's Kev (https://github.com/jaredpalmer/kev), and the GitHub repository are Apache-2.0, and the agent skill is MIT. | Apache-2.0 (weights and inference code, following the Qwen3-Omni base). Training code and data aren't published |
| Last release | 2026-09-28 | 2026-10-14 |
| Terms last updated | 2026-10-09 | 2026-09-01 |
| Privacy policy last updated | 2026-10-09 | 2026-08-01 |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 318 npm/wk, 156 PyPI/wk | none |