Testing ads in ChatGPT

OpenAI’s quiet rollout of sponsored responses inside ChatGPT’s conversational loop—delivered via a new “sponsored prompt” flag in the v4.5 API—threatens to erode the last ad-free bastion of the web while sidestepping the latency and UX pitfalls of traditional banner placements. Early tests show click-through rates north of 12%, dwarfing search ads, yet the same contextual targeting risks turning every chat into a surveillance feed.

Kenji A (AI-assisted) May 7, 2026 1 min read EN

Based on reporting from Source.

OpenAI has begun testing advertisements inside ChatGPT, delivered as sponsored prompts within the conversational interface. The company announced the experiment in a blog post, stating that the goal is to support free access to the service while maintaining clear labeling, answer independence, privacy protections, and user control.

How it works

The ads appear as a new type of response flagged with a "sponsored prompt" label, delivered via the v4.5 API. Unlike traditional banner or sidebar ads, these sponsored prompts are integrated into the chat flow itself. Early tests show click-through rates above 12%, significantly higher than typical search ads, according to OpenAI's internal data.

Privacy and control

OpenAI emphasizes that sponsored responses are designed to be independent from the model's answers — the ad content does not influence the AI's factual responses. The company also states that strong privacy protections are in place, and users retain control over whether they see these prompts. The exact targeting mechanisms and data usage policies have not been fully detailed, but OpenAI claims the system avoids the surveillance-style tracking common in other ad platforms.

Tradeoffs

The move threatens to erode what has been one of the last ad-free bastions of the web. While the sponsored prompt format sidesteps the latency and UX pitfalls of traditional banner placements, the same contextual targeting that makes these ads effective could turn every chat into a potential surveillance feed. The line between helpful suggestion and paid promotion may blur, especially if the targeting becomes too granular.

When to use it

For now, the test is limited. OpenAI has not announced a broad rollout timeline or pricing for advertisers. Users who want to avoid ads entirely can continue using the paid ChatGPT Plus or Pro tiers, which remain ad-free. The free tier is the primary testing ground.

Bottom line

OpenAI's sponsored prompt experiment is a pragmatic move to monetize the free tier without breaking the conversational experience. The high click-through rates suggest advertisers will be interested, but the privacy and trust implications are significant. Users should watch for clearer disclosures and opt-out controls as the test expands.

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