Comparison · 2 options
Admux vs OpenAI Ads Manager
OpenAI Ads Manager buys ChatGPT ads directly, on a postpay account per advertiser. Admux buys ChatGPT ads together with Google and Gravity from one prepaid balance, adds a disclosed markup to the media cost, and gives agents scoped keys and an MCP server.
Side by side
Each cell is what that company publishes, with the source number. A dash means it isn’t published or doesn’t apply.
| Question | Admux | OpenAI Ads Manager |
|---|---|---|
| Channels | ChatGPT ads, Google Search (including eligible AI placements) and the Gravity network[1] | Self-serve Ads Manager (beta) at ads.openai.com[2] |
| Accounts | One Admux workspace; no separate ad account with each provider[3] | Create a separate ad account for each advertiser[2] |
| Billing | Prepaid USD balance; each campaign reserves its full budget when submitted[1] | Postpay; self-serve card accounts are charged when a payment threshold is reached and at month end[4] |
| Price | Provider media cost plus a per-channel markup, shown in a price offer before you submit[1] | Auction; the final winning auction bid sets the price paid[5] |
| API | HTTP API with an OpenAPI document; one key covers all channels[6] | Public REST API (https://api.ads.openai.com/v1) for campaigns, ad groups, ads, feeds, conversions and reporting; keys created in Ads Manager[7] |
| Agents and MCP | MCP server over Streamable HTTP; tools filtered by the key’s scopes[8] | — |
| Launch control | Review before launch by default: approved legs wait for you unless a key with launch scope says otherwise[1] | Yes; ads must pass review before serving[9] |
Which fits you
Admux
- You want ChatGPT, Google and Gravity from one balance and one report.
- You want to prepay rather than run a postpay account.
- You want an agent to work through a scoped key with a spending limit.
OpenAI Ads Manager
- You only need ChatGPT ads and want to pay media cost with no markup.
- You want OpenAI features as soon as they ship, such as new bidding options.
- You manage up to a few advertisers’ accounts yourself.
Questions
Does Admux cost more than buying from OpenAI directly?
Yes: Admux charges the provider’s media cost plus a per-channel markup, shown in the price offer before you submit. In return you get one prepaid balance across channels, screening before submission, and scoped keys for agents.
Does OpenAI have an MCP server for ads?
OpenAI doesn’t document one; it offers a REST Advertiser API and a ChatGPT Ads Manager plugin.
Sources
- Admux agents.txt: instructions for AI agentsAdmux · checked 10 Nov 2026
- Ads Manager Account Setup | OpenAI Help CenterOpenAI Help Center · checked 10 Nov 2026
- AdmuxAdmux · checked 10 Nov 2026
- Billing & Payment | OpenAI Help CenterOpenAI Help Center · checked 10 Nov 2026
- Bidding strategies and how pricing works in ChatGPT Ads | OpenAI Help CenterOpenAI Help Center · checked 10 Nov 2026
- Admux HTTP API guideAdmux · checked 10 Nov 2026
- Overview (Advertiser API)OpenAI developer docs · checked 10 Nov 2026
- Admux MCP server guideAdmux · checked 10 Nov 2026
- Frequently asked questions | OpenAI Help CenterOpenAI Help Center · checked 10 Nov 2026
Comparisons use what each company publishes as of the date above. Admux is one of the options compared on some pages; we keep every cell to sourced facts.