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OpenAI introduces text watermarking in its API – disabled by default

OpenAI is launching support for text watermarking in its developer interface. The feature is disabled by default to give developers full control over their applications.

By the Aheadline editorial team·6 okt. 2026·2 min read·Source: Entity-watch: OpenAIVerifierad signalAI-generated
OpenAI introduces text watermarking in its API – disabled by default
OpenAI introduces text watermarking in its API – disabled by default
OpenAI introduces text watermarking in its API – disabled by default
By · Policy- & EU-reporter
Last updated
Vad betyder det för mig?

What happened?

OpenAI has launched support for text watermarking via its developer interface (API). The feature allows developers to include an invisible digital signature in text generated by the company's AI models, facilitating the identification of AI-generated content. Unlike competitor Anthropic, OpenAI has chosen to have the feature disabled by default.

Key facts

Status för vattenmärkningAvstängd som standard (off by default)
KonkurrentjämförelseAnthropic har funktionen aktiverad som standard

Why it matters

Traceability of AI-generated text has become a key issue in combating disinformation and preventing misuse. By offering watermarking at the API level, OpenAI provides organisations with better tools to monitor and control their content, while maintaining flexibility for developers who do not want to affect the model's latency or generation patterns.

Who is affected?

The update primarily affects software developers and companies building applications on top of the OpenAI API. Developers must now actively choose whether they want generated text to include watermarking data or not.

Impact on the EU

The feature is being made available globally via the OpenAI API, meaning developers and companies in the EU will also have access to the tool. Unlike some stricter consumer regulations, the optional default setting does not directly affect the existing systems of EU developers.

What else you should know

Anthropic previously implemented watermarking in its developer tools, but chose to have the feature enabled by default. OpenAI's decision to make the feature optional means it is up to each individual developer to evaluate the need for traceability against potential impacts on model performance.

Frequently asked questions

Quick answers about this story

Vad har hänt?
OpenAI har introducerat en funktion för vattenmärkning av text i sitt utvecklargränssnitt (API), vilket gör det möjligt att identifiera AI-genererat innehåll.
När hände det?
Uppdateringen publicerades den 5 oktober 2026.
Varför spelar det roll?
Det ger utvecklare verktyg att spåra AI-genererad text och motverka desinformation, samtidigt som inställningen är valfri för att inte störa befintliga system.
Påverkar det EU?
Ja, funktionen är tillgänglig globalt via OpenAI:s API, inklusive för utvecklare och företag baserade inom EU.
Original source
Entity-watch: OpenAI·thenewstack.io

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Topics

#OpenAI#API
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