# Introduction

{% hint style="info" %}
If you want to build with onchain AI.

ORA offers:

* zkML of [keras2circom](https://github.com/ora-io/keras2circom) (the most battle-tested and performant zkML framework)
* [opML](https://arxiv.org/abs/2401.17555) of [AI Oracle](https://docs.ora.io/doc/~/changes/tjpmQ4OUIWgthP6ZxBLq/oao-onchain-ai-oracle/introduction) (run huge model like LlaMA2-7B and Stable Diffusion now)
* zk+opML with [opp/ai](https://arxiv.org/abs/2402.15006) (futuristic onchain AI fuses zkML's privacy and opML's scalability)
  {% endhint %}

[Onchain AI Oracle (OAO)](https://mirror.xyz/orablog.eth/qLBIR_yxmpFJ4dg5p5Sn8Wz46aQDTG1jCW8myeE7zZ8) is the ORA's verifiable and decentralized AI oracle.

OAO integrates different AI models onchain in ORA AI Oracle nodes.

<figure><img src="https://4087680299-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FllyHj70MVMOxu2WT7tZv%2Fuploads%2FWTsQZaNMNAavIE6wLpjt%2FGroup%201000006228.png?alt=media&#x26;token=d2e94367-3547-4fef-9a2e-015d67316892" alt=""><figcaption></figcaption></figure>

Smart contract developers can build their own contract based on different models in AI Oracle, to interact with OAO contract, so that they can use AI onchain.

<figure><img src="https://4087680299-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FllyHj70MVMOxu2WT7tZv%2Fuploads%2F6QgG7a1dniqbP8V2UdUo%2F%E5%9B%BE1.png?alt=media&#x26;token=6189b817-7257-472b-bb09-d0ae524743f2" alt=""><figcaption></figcaption></figure>

Some of the example use cases are: AIGC NFT with ERC-7007, zkKYC using facial recognition based on ML, onchain AI games (e.g. Dungeon and Dragons), prediction market with ML, content authenticity (deepfake verifier), compliant programmable privacy, prompt marketplace, reputation/credit scoring... For example integrations and ideas to build, see [awesome-ora](https://github.com/ora-io/awesome-ora#-ai-oracle-cle-ecosystem).


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