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feat: add OpenRouter image provider for higher-quality image generation

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Replaces Cloudflare Workers AI (FLUX.1 schnell) as the default image
provider with OpenRouter, which offers FLUX.2 Pro, Seedream 3.0,
Gemini Flash Image, and GPT Image 1 at comparable or better pricing.

- New provider class (3-file split: provider, pricing, support) reuses
  the existing OpenRouter API key and Cloudflare AI Gateway
- Admin settings: new Image Provider dropdown (openrouter/cloudflare),
  model picker shows all available image models from both providers
- Image pipeline auto-selects the configured provider at construction
- Cost logging now uses actual model name instead of hardcoded flux-1-schnell
- Default model changed to black-forest-labs/flux-2-pro ($0.03/image)
- Unit tests for pricing resolution and provider response parsing

Cost impact: FLUX.2 Pro at $0.03/image vs schnell at $0.0007/image —
~43x more expensive per image, but dramatically better quality. At 2
images/article × 1 article/day = ~$1.80/month. Seedream 3.0 ($0.003)
available as a budget alternative.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
peptiderepo
2026-04-18 09:19:13 +07:00
parent b5e91ba3a6
commit 0a68741945
11 changed files with 852 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

105
includes/admin/class-settings-fields-extended.php
View File

@@ -14,6 +14,73 @@ declare(strict_types=1);
*/
class PRAutoBlogger_Settings_Fields_Extended {
/**
* Static image model list for the admin model picker.
* No registry API for these — they're hardcoded here and updated manually.
*
* @return array<int, array<string, mixed>>
*/
public static function get_image_models(): array {
return [
[
'id' => 'black-forest-labs/flux-2-pro',
'name' => 'FLUX.2 Pro',
'provider' => 'openrouter',
'cost_per_image' => 0.03,
'capabilities' => [ 'image_generation' ],
'description' => __( 'High quality, fast. Recommended.', 'prautoblogger' ),
],
[
'id' => 'black-forest-labs/flux-1.1-pro',
'name' => 'FLUX 1.1 Pro',
'provider' => 'openrouter',
'cost_per_image' => 0.04,
'capabilities' => [ 'image_generation' ],
'description' => __( 'Previous gen Pro. Slightly pricier.', 'prautoblogger' ),
],
[
'id' => 'black-forest-labs/flux-1.1-pro-ultra',
'name' => 'FLUX 1.1 Pro Ultra',
'provider' => 'openrouter',
'cost_per_image' => 0.06,
'capabilities' => [ 'image_generation' ],
'description' => __( 'Highest quality FLUX. Premium.', 'prautoblogger' ),
],
[
'id' => 'bytedance/seedream-3.0',
'name' => 'Seedream 3.0',
'provider' => 'openrouter',
'cost_per_image' => 0.003,
'capabilities' => [ 'image_generation' ],
'description' => __( 'Budget. Good quality, very low cost.', 'prautoblogger' ),
],
[
'id' => 'google/gemini-2.5-flash-preview:image',
'name' => 'Gemini 2.5 Flash Image',
'provider' => 'openrouter',
'cost_per_image' => 0.01,
'capabilities' => [ 'image_generation' ],
'description' => __( 'Google multimodal. Text-in-image.', 'prautoblogger' ),
],
[
'id' => 'openai/gpt-image-1',
'name' => 'GPT Image 1',
'provider' => 'openrouter',
'cost_per_image' => 0.04,
'capabilities' => [ 'image_generation' ],
'description' => __( 'OpenAI. Photorealistic style.', 'prautoblogger' ),
],
[
'id' => 'flux-1-schnell',
'name' => 'FLUX.1 schnell (Cloudflare)',
'provider' => 'cloudflare',
'cost_per_image' => 0.0007,
'capabilities' => [ 'image_generation' ],
'description' => __( 'Cheapest. Low quality, 4-step.', 'prautoblogger' ),
],
];
}
/**
* Get schedule, publishing, analytics, and image settings fields.
*
@@ -113,14 +180,36 @@ class PRAutoBlogger_Settings_Fields_Extended {
'type' => 'toggle',
'section' => 'prautoblogger_images',
'default' => '0',
'description' => __( 'When enabled, generate two images (A/B) for each published article. Requires Cloudflare credentials.', 'prautoblogger' ),
'description' => __( 'When enabled, generate two images (A/B) for each published article.', 'prautoblogger' ),
],
[
'id' => 'prautoblogger_image_provider',
'label' => __( 'Image Provider', 'prautoblogger' ),
'type' => 'select',
'section' => 'prautoblogger_images',
'default' => 'openrouter',
'options' => [
'openrouter' => __( 'OpenRouter (FLUX.2 Pro, Seedream, GPT-Image)', 'prautoblogger' ),
'cloudflare' => __( 'Cloudflare Workers AI (FLUX.1 schnell)', 'prautoblogger' ),
],
'description' => __( 'OpenRouter reuses your existing API key and offers higher-quality models. Cloudflare is cheaper but lower quality.', 'prautoblogger' ),
],
[
'id' => 'prautoblogger_image_model',
'label' => __( 'Image Model', 'prautoblogger' ),
'type' => 'model_select',
'section' => 'prautoblogger_images',
'default' => PRAUTOBLOGGER_DEFAULT_IMAGE_MODEL,
'capability' => 'image_generation',
'description' => __( 'Pick a model from your selected provider. FLUX.2 Pro recommended for quality.', 'prautoblogger' ),
'badge' => __( 'Quality', 'prautoblogger' ),
],
[
'id' => 'prautoblogger_cloudflare_ai_token',
'label' => __( 'Cloudflare API Token', 'prautoblogger' ),
'type' => 'password',
'section' => 'prautoblogger_images',
'description' => __( 'Workers AI token with Read + Edit scope. Create at dash.cloudflare.com → AI → API Tokens.', 'prautoblogger' ),
'description' => __( 'Only needed if using Cloudflare provider. Workers AI token with Read + Edit scope.', 'prautoblogger' ),
'icon' => '🔑',
],
[
@@ -129,17 +218,7 @@ class PRAutoBlogger_Settings_Fields_Extended {
'type' => 'text',
'section' => 'prautoblogger_images',
'default' => '',
'description' => __( 'The Account ID shown on your Cloudflare dashboard sidebar.', 'prautoblogger' ),
],
[
'id' => 'prautoblogger_image_model',
'label' => __( 'Image Model', 'prautoblogger' ),
'type' => 'model_select',
'section' => 'prautoblogger_images',
'default' => PRAUTOBLOGGER_DEFAULT_IMAGE_MODEL,
'capability' => 'cloudflare_image',
'description' => __( 'Schnell is the normal choice. Switch to [dev] for higher quality.', 'prautoblogger' ),
'badge' => __( 'Low cost', 'prautoblogger' ),
'description' => __( 'Only needed if using Cloudflare provider.', 'prautoblogger' ),
],
[
'id' => 'prautoblogger_image_style_suffix',