drex-v1.5

Drex v1.5 is a 9B decision model from Nace.AI. Given a state (text or JSON) and typed questions (yes/no, multiple choice, or ordinal score), it returns a calibrated probability for every option in a single forward pass, with no text generation. It is TypeSafe System One compatible, handles contexts up to 131K tokens, and scores 58.28 on Decision Index 0.2.1, ahead of Jev 1.13.0.

Context
131K
Input price
$0.04/1M tokens
Output price
$0/1M tokens

Capabilities

Infrastructure
Streaming

Details

Model IDnace-ai/drex-v1.5
Provider DeepInfra
Creator nace-ai
Family—
License—
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters—
Architecture—
Context window131K tokens
Max input—
Max output—
Reasoning tokens—
Knowledge cutoff—
Release date—
Sourceofficial

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.deepinfra.com/v1/openai/v1/chat/completions

Pricing

Input
$0.04
Output
$0
Cache write
—
Cache read
—
Batch in
—
Batch out
—

API

GET/v1/models/deepinfra/nace-ai/drex-v1.5

drex-v1.5

nace-ai/drex-v1.5

Drex v1.5 is a 9B decision model from Nace.AI. Given a state (text or JSON) and typed questions (yes/no, multiple choice, or ordinal score), it returns a calibrated probability for every option in a single forward pass, with no text generation. It is TypeSafe System One compatible, handles contexts up to 131K tokens, and scores 58.28 on Decision Index 0.2.1, ahead of Jev 1.13.0.

Changes · 2 entries
nace-ai/drex-v1.5createca7a400Nov 2, 2026, 03:02 AM
nace-ai/drex-v1.5createbcf2693Oct 16, 2026, 06:36 AM