Nace.AIDecision modelOpen weights
Drex v1.5
Summary
Drex v1.5 classifies cases using supplied answer options. It can use text or JSON as shared context and return separate probabilities for several questions.
The open weights have about nine billion parameters and use MiMo-V2.6-Distill-Qwen-9B as a backbone. Nace.AI documents 131,072 tokens of shared API context and 139,264 tokens per question including context.
All benchmark results
Every published result with its source, test setup and comparison models.
Show all 2 published benchmark results
Measurements without matching peer values
These measurements have no matching peer values under the same test conditions. Their original values and sources remain available here.
Decision Index 0.4.1 (Public) (Show measurement, test conditions, and source)
- Source value
- 58.08
- Score
- 58.08
- Metric
- chance-corrected skill
- Unit
- points
- Benchmark version
- 0.4.1
- Category
- decision
- Direction
- Higher is better
- Source type
- vendor-reported
- Evaluator
- Nace.AI Drex technical report
- Status
- active
- Retrieved at
- 2026-11-07
- Methodology
- Vendor-reported result. Public-suite result from the October 22, 2026 leaderboard, reproduced in Table 12.
Decision Index 0.4.1 (Full) (Show measurement, test conditions, and source)
- Source value
- 45.78
- Score
- 45.78
- Metric
- chance-corrected skill
- Unit
- points
- Benchmark version
- 0.4.1
- Category
- decision
- Direction
- Higher is better
- Source type
- vendor-reported
- Evaluator
- Nace.AI Drex technical report
- Status
- active
- Retrieved at
- 2026-11-07
- Methodology
- Vendor-reported result. Full result including public and private tests from the October 22, 2026 leaderboard, reproduced in Table 12.
Similar models
More models of the same kind as Drex v1.5, chosen by model line, developer, size, price and release date.
All specifications
Architecture
Input and output
Watermarking and provenance
AI watermarking refers to invisible signals embedded in the output. Visible marks and provenance metadata are listed separately. Unknown means there is insufficient evidence for that particular field.
- AI watermarking
- Unknown
- no source
- Watermarking technique
- Not known
- no source
Licence and access
- Shutdown
- None announced
- no source
API
Further details
- Local context window
- 16,384 tokens by default, configurable up to 131,072 tokens.
- Source: Local context window
- API input limit
- Up to 131,072 tokens of shared context and 139,264 tokens per question including context.
- Source: API input limit
Sources and data date
Benchmark sources at a glance
Which independent evaluators tested this model. This is coverage, not a quality ranking.
No active result from the reviewed external evaluators can currently be attributed to this model. Other source evidence remains available below.
Without vendor claims and historical or disputed results; those stay labelled in the single values.
| Type | Evidence and data date |
|---|---|
| Research status | Research date November 7, 2026. 1 source URLs checked. This documents the inspected sources, not an exhaustive inventory of every publication. |
| Additional source | Nace.AI API model catalog (retrieved November 7, 2026) · Nace.AI API model catalog · Editorial description reviewed November 7, 2026 |
| Additional source | Drex v1.5 model card (retrieved November 7, 2026) · Drex v1.5 model card · Editorial description reviewed November 7, 2026 |
| Additional source | Nace.AI Drex technical report (retrieved November 7, 2026) |