# Differences between Ethereum and Pivotal ## Pivotal is built on the [Bedrock](https://stack.optimism.io/docs/releases/bedrock/explainer/) release of the [OP Stack](https://stack.optimism.io/), which is designed from the ground up to be as close to Ethereum as possible. ### As such, there are very few differences when it comes to building on Pivotal and Ethereum. However, there are still some minor discrepancies between the behavior of Pivotal and Ethereum that you should be aware of when building apps on top of Pivotal. ### These minor differences include: * [Opcodes](https://stack.optimism.io/docs/releases/bedrock/differences/#opcode-differences) * [Blocks](https://stack.optimism.io/docs/releases/bedrock/differences/#blocks) * [Network specifications](https://stack.optimism.io/docs/releases/bedrock/differences/#network-specifications) * [Transaction costs](https://stack.optimism.io/docs/releases/bedrock/differences/#transaction-costs) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.pivotalchain.io/pivotal-docs/build-on-pivotalchain/differences-between-ethereum-and-pivotal.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.