The list is fetched, not hardcoded
Each provider is asked once a day what your account can serve, so a model released after the last plugin update still appears.
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Use Claude in WordPress with your own Anthropic key
WP Content Writer Pro can call the Anthropic API from your WordPress site using a key you supply. Your content goes from your server to Anthropic directly; we never proxy it and never see it.
First, the thing that catches people out
A Claude subscription is not API access. They are separate Anthropic products, billed separately. Paying for Claude.ai does not give you an API key, and an API key is what a WordPress plugin needs in order to call a model on your behalf.
You will need a key from the Anthropic console with credit on the account. The same separation applies to OpenAI: a ChatGPT subscription does not include API access either.
Models, and what happens when one is retired
Retirement is handled explicitly
When a model you use is withdrawn it is replaced with the closest match from the same provider and you are emailed. If nothing is close enough, nothing changes and the email says so.
Your provider is never switched for you
That is a key, a bill and a contract, not a detail to swap because a model moved.
Claude alongside four others
Anthropic, OpenAI, Google Gemini, NVIDIA NIM and OpenRouter sit behind one interface, so Claude can be your default or your fallback.
Where your key and your content go
The key stays on your site
Encrypted in your own WordPress database, never rendered back into a form field, and never sent to us. You can define it in wp-config.php instead if you prefer.
The content goes to Anthropic
Directly, from your server. We do not proxy it, so there is no copy of your drafts on our infrastructure.
Their terms govern what happens next
Anthropic decides what it retains. Their policies are authoritative; ours cannot speak for them.
Credentials travel in headers
Never in a query string, which gets copied into every access and proxy log it passes through.
Failover, and why it behaves the way it does
Multi-provider support is easy to claim and easy to get wrong. Two details decide whether you leave it switched on.
It is sticky. Once a call succeeds on a fallback entry, the rest of that article continues there. Mixing models mid-article produces visible voice drift between the metadata, the body and the rewrite, and a consistent second choice reads better than a blend.
It is capped. At most five entries are tried per call. An uncapped chain during a provider-wide outage burns every configured model and still fails, only slower and more expensively.
Questions
Does my Claude subscription work with this?
No, and it is the most common setup problem. A Claude.ai subscription and Anthropic API access are separate products with separate billing. The plugin calls the API, so you need a key from the Anthropic console with credit on the account.
Is this plugin made by Anthropic?
No. WP Content Writer Pro is published by OwnWebServers LTD and is not affiliated with, endorsed by or sponsored by Anthropic. Claude is a trademark of Anthropic; the name is used here only to say which API the plugin can be configured to call.
Which Claude models can I choose?
The list is fetched from Anthropic once a day rather than hardcoded, so the dropdown shows what your own account can actually use, including models released since the last plugin update. At the time of writing that covers Opus 4.8, Sonnet 5, Haiku 4.5 and Fable 5.
What happens if Anthropic rate-limits me mid-article?
If you have configured a fallback order, the run continues on the next entry and stays there for the rest of that article rather than mixing models mid-piece. At most five entries are tried per call, so a provider-wide outage fails quickly instead of burning every model you own.
Trademark notice
Claude is a trademark of Anthropic. ChatGPT and GPT are trademarks of OpenAI. Gemini is a trademark of Google. NIM is a trademark of NVIDIA. WP Content Writer Pro is published by OwnWebServers LTD and is not affiliated with, endorsed by or sponsored by any of them; these names identify the APIs the plugin can be configured to call.
Connect Anthropic
Paste a key, press Test, and the plugin tells you whether it worked before you rely on it.