AI providers

Writrex connects directly to the provider you choose, using your own API key. You pay the provider for usage; Writrex adds no markup and no per-word charge.

Overview

Provider	Good for	Plan
Google Gemini	Balanced quality, speed and cost. The recommended starting point.	All plans
OpenAI	Strong long-form and detailed FAQ output.	Starter+
Anthropic Claude	Natural, human-sounding copy for client-facing pages.	Starter+
Perplexity	Web-grounded research before writing.	Starter+

Configure providers in Writrex → Settings → AI Provider Configuration and Additional AI Providers. Typical generation cost is a few cents per page, depending on the model and page length.

Live model discovery

Writrex doesn't hard-code a model list. After you save a key, it asks the provider which text models that key can use and lets you pick one. Use the Refresh models buttons to fetch the latest list.

Gemini, OpenAI and Claude - models are discovered live and cached for a few hours.
Perplexity - choose a model such as sonar-pro in Settings.
If discovery fails, Writrex falls back to a built-in list so generation keeps working.

Availability depends on your account. Some models need billing enabled or aren't available in every region. If a model doesn't appear, check the provider console.

Getting an API key

Google Gemini

Open Google AI Studio and sign in.
Choose Get API key → Create API key.
Paste it into Settings → Gemini API key and save.

Writrex checks a Gemini key as soon as you paste it. A green Key works means it is ready; otherwise you get a plain message saying the key was rejected, is rate limited or could not be reached. The key is not saved until you save Settings. In Writrex Lite, step 1 of the setup wizard also has a Connect with Google button that opens Google AI Studio in a new tab. You still copy the key and paste it into Writrex yourself. The key check sends the pasted key to Google to validate it.

OpenAI

Open the OpenAI platform and create a secret key. It is shown only once.
Add billing credit - OpenAI needs a funded account.
Paste it into Settings → OpenAI API key.

Anthropic Claude

Open the Anthropic console and create a key.
Top up billing credit.
Paste it into Settings → Anthropic API key.

Perplexity

Open Perplexity → Settings → API and generate a key.
Paste it into Settings → Perplexity API key.

Primary and fallback provider

Choose a primary provider for pages, blogs, WooCommerce, templates, editor buttons and SEO suggestions. Enable AI fallback and pick a different provider so a failed request or outage doesn't stop a campaign. The fallback only runs on failure.

Providers in Ask Writrex

Ask Writrex uses the same saved keys but works differently from generation: you pick the provider, model and effort for each chat, and it never switches provider on its own. If a model is busy or rate limited it moves to another model from the same provider. Writrex Lite uses Gemini; every paid plan can also use OpenAI and Anthropic Claude. Perplexity is not used by Ask Writrex.

Research-first generation

With Perplexity research enabled, Writrex sends a research query first, then hands the findings to your writer model to turn into finished copy. This helps location pages where current local facts improve quality. It requires a Perplexity key. The Structured brief option in the generation form adds a research brief that's stored with the page and shown in its Research Brief panel.

Temperature

Lower values are safer and more predictable; higher values add variation. In Pages Automator, the Writing temperature (recommended 0.75–0.9) and Refinement temperature (recommended 0.45–0.65) can be set per generation.

Last updated: 30 October 2026