a4405a5d32
Don't silently swap to a different model when the user's selection is unknown. Pass whatever the user configured to OpenRouter and let the API error clearly. Fallback chain: caller hint → saved option → PRAUTOBLOGGER_DEFAULT_IMAGE_MODEL constant. Cost estimation for unknown models logs a warning and uses a conservative $0.05 estimate. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
95 lines
3.2 KiB
PHP
95 lines
3.2 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* Pricing + model-id resolution helpers for the OpenRouter image provider.
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*
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* Mirrors the Cloudflare pricing helper pattern. Each model's cost per image
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* is a flat rate sourced from OpenRouter's pricing page (April 2026).
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*
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* Triggered by: PRAutoBlogger_OpenRouter_Image_Provider (both generate_image()
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* and estimate_cost() delegate here).
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* Dependencies: None — pure calculation + option reads.
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*
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* @see class-openrouter-image-provider.php — Caller.
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* @see class-cloudflare-image-pricing.php — Sibling pattern for Cloudflare.
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*/
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class PRAutoBlogger_OpenRouter_Image_Pricing {
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/**
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* Flat per-image cost (USD) for each supported model, April 2026.
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* Update here when OpenRouter reprices or new models launch.
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*
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* @var array<string, float>
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*/
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private const COST_PER_IMAGE = [
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'google/gemini-2.5-flash-image' => 0.005,
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'google/gemini-3.1-flash-image-preview' => 0.008,
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'google/gemini-3-pro-image-preview' => 0.03,
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'openai/gpt-5-image-mini' => 0.02,
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'openai/gpt-5-image' => 0.08,
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];
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/**
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* Resolve the model identifier from a hint, falling back to site option,
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* then to the PRAUTOBLOGGER_DEFAULT_IMAGE_MODEL constant.
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*
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* Never silently swaps to a different model — if the user picked something,
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* we send it to OpenRouter and let the API error if it's invalid. That way
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* the user sees a clear log message instead of getting billed for a model
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* they didn't choose.
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*
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* @param string $hint Caller-supplied model identifier (may be empty).
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* @return string OpenRouter model id.
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*/
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public function resolve_model( string $hint ): string {
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$hint = trim( $hint );
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if ( '' !== $hint ) {
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return $hint;
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}
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$saved = trim( (string) get_option( 'prautoblogger_image_model', '' ) );
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if ( '' !== $saved ) {
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return $saved;
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}
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// Last resort: use the constant from prautoblogger.php (admin can change it).
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return defined( 'PRAUTOBLOGGER_DEFAULT_IMAGE_MODEL' )
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? PRAUTOBLOGGER_DEFAULT_IMAGE_MODEL
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: 'google/gemini-2.5-flash-image';
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}
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/**
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* Estimate USD cost for a single image at the given model.
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*
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* OpenRouter image models use flat per-image pricing, not per-megapixel.
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* Width/height are accepted for interface compatibility but don't affect cost.
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*
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* @param int $width Width in pixels (unused for flat pricing).
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* @param int $height Height in pixels (unused for flat pricing).
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* @param string $model Resolved OpenRouter model id.
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* @return float USD cost rounded to 6 decimals.
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*/
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public function estimate_cost( int $width, int $height, string $model ): float {
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if ( isset( self::COST_PER_IMAGE[ $model ] ) ) {
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return round( self::COST_PER_IMAGE[ $model ], 6 );
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}
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// Unknown model — log it and use a conservative $0.05 estimate.
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PRAutoBlogger_Logger::instance()->warning(
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sprintf( 'No pricing data for image model "%s". Using $0.05 estimate.', $model ),
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'openrouter-image'
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);
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return 0.05;
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}
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/**
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* Get the full model cost table for admin display.
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*
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* @return array<string, float> Model id => cost per image in USD.
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*/
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public static function get_model_costs(): array {
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return self::COST_PER_IMAGE;
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}
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}
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