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Opml

OPML is an open-source infrastructure project that runs supported AI model inference off-chain and provides on-chain interactive disputes for optimistic fault proofs. Its Go tensor library, MIPS machine-learning runtime, and smart contracts implement model execution and challenge logic.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Opml — OpenViST project profile in Infrastructure.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use OPML when you want to study or prototype off-chain inference paired with an on-chain challenge and verification flow, particularly through its documented MNIST example.

Who it is for

  • Developers exploring optimistic verification of off-chain AI inference.
  • Teams prototyping model-inference dispute flows with MIPS execution and smart contracts.

Documented uses

  • Build the repository with its documented Go, Node.js, Make, and CMake prerequisites.
  • Demonstrate an MNIST inference fault-proof flow, including a challenge game and single-step verification.
  • Explore the documented LLaMA example, including LLaMA 2.
Before you choose

Requirements & limits

The project is publicly available on GitHub and states that its code is MIT licensed.

  • The repository documents MNIST and LLaMA examples; general DNN model support through ONNX is marked work in progress.
  • Inference is listed as complete, while training and fine-tuning are listed as pending.
  • The documented MNIST demo requires a local Hardhat node.
  • The repository explicitly warns that the code is unaudited and should not be used to secure money until further testing and auditing are done.
  • The MNIST example and challenge script are described as demonstrating the fault-proof and single-step verification flow (Verified).

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Build OPML and run the MNIST fault-proof demo

Build the repository and follow its documented local MNIST challenge and single-step verification example.

Before you start

  • Go 1.19
  • Node.js
  • Make
  • CMake

Steps

  1. Clone the repository recursively.

  2. Run the command below.

    Documented command
    make build

  3. Start a local node with the command below.

    Documented command
    npx hardhat node

  4. Run the command below.

    Documented command
    bash ./demo/challenge_simple.sh

Expected outcome

The documented example demonstrates an MNIST fault-proof process, including the challenge game and single-step verification.

Guide limitations

  • The repository describes this as an example; it does not establish a production deployment or security assurance.
  • The project states that its code is unaudited and should not be used to secure money until further testing and auditing are done.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
14 October 2026
Original website title
ora-io/opml · Official homepage title · retained in its source language
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