# Comparison of Proving Frameworks

### opML vs zkML

ORA leverages opML for Onchain AI Oracle because it’s the most feasible solution on the market for running any-size AI model onchain. The comparison between opML and zkML can be viewed from the following perspectives:

* **Proof system**: opML uses fraud proofs, while zkML uses zk proofs.
* **Performance**: opML is much more performant, while zkML has long proof generation time and extremely high memory consumption ([ref1](https://hackmd.io/mGwARMgvSeq2nGvQWLL2Ww#Honey-I-SNARKED-the-GPT), [ref2](https://medium.com/@ModulusLabs/chapter-8-make-zkml-real-a3a355b2b756), [ref3](https://twitter.com/shumochu/status/1723839817836888365), [ref4](https://blog.ezkl.xyz/post/benchmarks/), [ref5](https://medium.com/@ModulusLabs/chapter-14-the-worlds-1st-on-chain-llm-7e389189f85e), [ref6](https://twitter.com/nim_network/status/1783147018392588685)). 
* **Security**: opML uses crypto-economic based security, while zkML uses cryptography based security.
* **Finality**: We can define the finalized point of zkML and opML as follows:
  * zkML: Zero-knowledge proof of ML inference is generated (and verified).
  * opML: Challenge period of ML inference is passed. With additional mechanisms, faster finality can be achieved in much shorter time than the challenge period.

<figure><img src="https://4087680299-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FllyHj70MVMOxu2WT7tZv%2Fuploads%2FmznuYLXWVF9rKQwM6dq3%2Fimage.png?alt=media&#x26;token=5cd594e4-c592-4b13-a8c6-b2095c7af1d5" alt=""><figcaption></figcaption></figure>

### opp/ai

Opp/AI combines both opML and zkML approaches to achieve scalability and privacy. It preserves privacy while being more efficient than zkML.

Compared to pure zkML, opp/ai has much better performance with the same privacy feature.<br>

<div data-full-width="true"><figure><img src="https://4087680299-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FllyHj70MVMOxu2WT7tZv%2Fuploads%2F4AU9kOTOMebNpIRSBiM1%2Fimage.png?alt=media&#x26;token=204e9218-e9e4-4bbb-ae07-eff9fe86e7c3" alt="" width="375"><figcaption></figcaption></figure></div>


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