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Nace.AI Drex Alternatives

Jev-compatible decision models with open weights: a probability for every option from one pass, 128K context

Drex is Nace.AI's family of decision models. You send the facts and the options; one forward pass returns a probability for every option, for choice, yes/no and scale questions.

Explore 18 alternatives to Nace.AI Drex across 1 category. Updated October 2026.

Featured

System1 Models

Hosted open decision models behind a Jev-compatible API, with an EU-only tier and a lower-cost Peer-to-Peer tier

$0.019 per 1M input tokens (s1-fast), output free

Lium

GPU rental marketplace where independent providers list verified NVIDIA hosts, billed per second

From $0.06/GPU-hour (RTX 3060, 15 Oct 2026)

NanoGPT

One OpenAI-compatible API for 600+ models, with text billed at provider list prices

Free Trial

Pay per prompt, from $0.10

Lyceum

EU-hosted inference cloud for open-source models, OpenAI-compatible

From $0.06/1M tokens

Feature your product here

Top Nace.AI Drex alternatives at a glance

System1 Models. Hosted open decision models behind a Jev-compatible API, with an EU-only tier and a lower-cost Peer-to-Peer tier
Liquid AI d1. Open-weight 3B decision model on LFM2.5-VL: typed answers over text, JSON and images in one forward pass
Clef. Cloudflare's open decision models: typed choices, scores and yes/no answers with probabilities, hosted or self-run.
ScaleDown Classify-1. Jev-compatible decision API for classification: label probabilities over text, images and documents up to 1M tokens
OpenAI Decisions API. Typed answers with probabilities for yes/no checks, fixed choices and rubric scores

Compare Nace.AI Drex with its alternatives

Product	Pricing Model	Free Tier	Open Source	Hosting	HQ
Nace.AI Drex	Freemium	✓	✓ Nace.AI Open RAIL-M	Cloud + Self-hosted	🇺🇸 United States
System1 Models	Pay-per-use	—	—	Cloud	🇩🇪 Germany
Liquid AI d1	Freemium	✓	✓ LFM Open License v1.0	Cloud + Self-hosted	—
Clef	Pay-per-use	—	✓ APACHE-2.0	Cloud + Self-hosted	🇺🇸 United States
ScaleDown Classify-1	Freemium	✓	—	Cloud	🇺🇸 United States
OpenAI Decisions API	Pay-per-use	—	—	Cloud	🇺🇸 United States
Celeris-1 Decision	Pay-per-use	—	—	Cloud	—
Respan Span-01	Freemium	✓	—	Cloud	🇺🇸 United States
Upstage Solar Decide	Pay-per-use	—	—	Cloud	🇰🇷 South Korea
Mapika Decider	Free	✓	✓ APACHE-2.0	Self-hosted	—
Perplexity pplx-decider	—	✓	✓ APACHE-2.0	Cloud + Self-hosted	—
Laya	Free	—	✓ APACHE-2.0	Self-hosted	—
Strands Decider	Free	✓	✓ APACHE-2.0	Self-hosted	🇺🇸 United States
Microsoft-Decision-1	Pay-per-use	—	—	Cloud	🇺🇸 United States
TypeSafe Jev	Pay-per-use	—	—	Cloud	🇺🇸 United States
Fastino GLiDE	Pay-per-use	—	—	Cloud	—

🤖 Inference APIs

System1 Models

Hosted open decision models behind a Jev-compatible API, with an EU-only tier and a lower-cost Peer-to-Peer tier

Featured

Liquid AI d1

Open-weight 3B decision model on LFM2.5-VL: typed answers over text, JSON and images in one forward pass

Open Source Free Trial

Clef

Cloudflare's open decision models: typed choices, scores and yes/no answers with probabilities, hosted or self-run.

Open Source

ScaleDown Classify-1

Jev-compatible decision API for classification: label probabilities over text, images and documents up to 1M tokens

Free Trial

OpenAI Decisions API

Typed answers with probabilities for yes/no checks, fixed choices and rubric scores

Celeris-1 Decision

Diffusion-based decision model: yes/no, choice and score answers with probabilities and optional one-line reasons

Respan Span-01

Behavior scoring model: the probability that each plain-language behavior you define is present in a conversation

Free Trial

Upstage Solar Decide

Upstage decision model on Solar Mini 4: choices, scores and yes/no answers with probabilities, Jev-compatible

Mapika Decider

Open-weight decision models fine-tuned from Qwen3.5: choices, scores and yes/no probabilities from one forward pass

Open Source Free Trial

Perplexity pplx-decider

Perplexity's open decision model: typed yes/no, choice and score answers with probabilities, by API or open weights

Open Source Free Trial

Laya

Open-source multilingual decision model: typed choices, scores and yes/no answers in one forward pass.

Open Source

Strands Decider

Open-weight decision models from AWS's Strands project: pick between options or rate on a scale, with a confidence

Open Source Free Trial

Microsoft-Decision-1

Microsoft's decision model on Foundry: typed scores and yes/no answers with probabilities instead of text

TypeSafe Jev

Hosted decision model that returns typed choices, scores and yes/no answers with calibrated confidence.

Fastino GLiDE

Fastino's thinking decision model: one selected action, a confidence and a probability for every option

Strom

EU-hosted decision model for text, JSON and images, with calibrated probabilities. In beta, access granted manually.

Kev

Open decision models from 0.8B to 27B, built on Qwen and compatible with TypeSafe's Jev API.

Open Source

Inception Mercury Decide

Inception's decision model: yes/no probabilities, categorical choices and ordinal scores over text, JSON and images

Free Trial

Browse all 147 Inference APIs products

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