> ## Documentation Index
> Fetch the complete documentation index at: https://docs.optimism.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Fact sheet

> A quick look of the OP Stack's capabilities

While the OP Stack allows for full customization, standard OP Stack chains adhere to a [standard set of technical and governance parameters](/op-stack/protocol/blockspace-charter), facilitating OP Stack interoperability, network security, and ease of upgrading your chain.

# Technical stack

| Feature                           | Standard OP Stack             | OP Stack                    |
| --------------------------------- | ----------------------------- | --------------------------- |
| **Parent chain**                  | Ethereum                      | Any L1, any L2              |
| **Throughput<sup>1</sup>**        | 32.5Mgas/s                    | 50Mgas/s                    |
| **Gas limit<sup>2</sup>**         | 200M                          | 200M                        |
| **Blocktimes<sup>3</sup>**        | 200ms                         | 200ms                       |
| **Data availability support**     | Ethereum                      | Ethereum, Celestia, EigenDA |
| **Gas token support<sup>4</sup>** | ETH                           | ETH, Custom Gas Token       |
| **Upgrades**                      | Facilitated via OP Governance | Self-managed                |
| **EVM compatibility**             | Equivalent                    | Variable                    |

<sup>1</sup>Data for Standard OP Stack from [Base](https://etherscan.io/address/0x73a79Fab69143498Ed3712e519A88a918e1f4072#readProxyContract#F14). Data for OP Stack from [opBNB](https://docs.bnbchain.org/bnb-opbnb/core-concepts/opbnb-metrics/).

<sup>2</sup>The standard blockspace charter has a max gas limit of [200m](https://specs.optimism.io/protocol/configurability.html?utm_source=op-docs\&utm_medium=docs#gas-limit). Both gas limit and gas target can be configured through the system config.

<sup>3</sup>While protocol blocktimes can be lowered to 1 second, subsecond blocktimes can be achieved using [Rollup Boost and Flashblocks](https://writings.flashbots.net/introducing-rollup-boost).

<sup>4</sup>OP Stack chains can use [Custom Gas Token](/op-stack/features/custom-gas-token) to enable any asset as the native fee currency. Standard OP Stack chains use ETH as the gas token, though chain operators can achieve similar UX using an ERC-20 paymaster.