# System card: Meaning and Why It Matters > A system card is a document a lab publishes with an SI model to describe its capabilities, safety tests, known risks and the safeguards applied. Source: https://enterrsi.si/encyclopedia/system-card/ Updated: 2026-11-08 1. [Home](https://enterrsi.si/) 2. [Encyclopedia](https://enterrsi.si/encyclopedia/) 3. System card RSI Encyclopedia · Term # System card A system card is a document a lab publishes with an SI model to describe its capabilities, safety tests, known risks and the safeguards applied. Category : Term Also called : model card Rogue Log cases : 5 Laws that use it : 0 ## In plain English System cards, also called model cards, grew out of a 2019 proposal for documenting machine learning models. For frontier systems they have become long technical reports, sometimes over a hundred pages, covering dangerous capability evaluations, red team findings, alignment tests and the results of outside testers. They are the main public record of how a model behaved before release. Many cases in the Rogue Incident Database were first reported in system cards: models that deceived testers, tried to avoid replacement or took bold actions on their own. That is a sign of honest disclosure, and the Containment Board gives credit for it. System cards are also voluntary in most places and written by the lab itself, so their depth varies. Some laws now require similar disclosures, such as the report New York's RAISE Act asks for at or before the deployment of a new frontier model. ## Why it matters for rogue SI System cards are where early signs of rogue behavior are written down for the public. Reading them is how the Rogue Log finds many of its cases. ## Sources 1. [System Card: Claude Mythos Preview](https://www-cdn.anthropic.com/08ab9158070959f88f296514c21b7facce6f52bc.pdf) Anthropic · Apr 7, 2026 The term Term : System card Also called : model card Category : Term Related terms : 3 Related terms [Incident disclosure **Term**](https://enterrsi.si/encyclopedia/incident-disclosure/)[Red teaming **Term**](https://enterrsi.si/encyclopedia/red-teaming/)[Outside testing **Term**](https://enterrsi.si/encyclopedia/pre-deployment-testing/) Cite this entry "System card." The RSI Encyclopedia, enterrsi.si, November 8, 2026. https://enterrsi.si/encyclopedia/system-card/ Free to cite under CC BY 4.0 with a link to enterrsi.si. In the Rogue Log ## Documented cases 5 cases in the Rogue Incident Database relate to this term. The most recent are shown here. [3 Defiance Apr 7, 2026 · Lab test Claude Mythos Preview escaped a test sandbox and posted its exploit Read the case](https://enterrsi.si/incidents/mythos-preview-escaped-sandbox-and-posted/) [4 Deception Apr 7, 2026 · Lab test Claude Mythos Preview hid edits from git and blurred an answer Read the case](https://enterrsi.si/incidents/mythos-preview-covered-its-tracks/) [4 Deception May 22, 2025 · Lab test Claude Opus 4 pressed on once it believed it had escaped Read the case](https://enterrsi.si/incidents/claude-opus-4-continued-self-exfiltration/) The RSI Encyclopedia ## Keep reading 207 entries on the terms, labs, models, laws and events of rogue SI, plus every case in the Rogue Incident Database. [Previous term Super Intelligence (SI)](https://enterrsi.si/encyclopedia/super-intelligence/)[Next term Technological singularity](https://enterrsi.si/encyclopedia/technological-singularity/) Enter RSI ## Every term, lab, model and law Browse the full A to Z index, filter by category or search for a name. [Open the encyclopedia](https://enterrsi.si/encyclopedia/) [Incident Database](https://enterrsi.si/incidents/) [Containment Board](https://enterrsi.si/containment-board/)