anthropic.php
1 year ago
core.php
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factory.php
1 year ago
google.php
1 year ago
huggingface.php
1 year ago
openai.php
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openrouter.php
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openrouter.php
244 lines
| 1 | <?php |
| 2 | |
| 3 | // If this isn't defined elsewhere, set it here by default. You can override |
| 4 | // it in your theme's functions.php or your main wp-config.php. If set to true, |
| 5 | // additional time will be spent fetching exact pricing info from OpenRouter |
| 6 | // after each query, resulting in more accurate but potentially slower responses. |
| 7 | if ( ! defined( 'MWAI_OPENROUTER_ACCURATE_PRICING' ) ) { |
| 8 | define( 'MWAI_OPENROUTER_ACCURATE_PRICING', false ); |
| 9 | } |
| 10 | |
| 11 | class Meow_MWAI_Engines_OpenRouter extends Meow_MWAI_Engines_OpenAI |
| 12 | { |
| 13 | /** |
| 14 | * Keep a static dictionary (query -> price) so that if we see the same query |
| 15 | * again in another instance, we can immediately return the stored price |
| 16 | * instead of recomputing. |
| 17 | * @var array |
| 18 | */ |
| 19 | private static $accuratePrices = array(); |
| 20 | |
| 21 | public function __construct( $core, $env ) { |
| 22 | parent::__construct( $core, $env ); |
| 23 | } |
| 24 | |
| 25 | protected function set_environment() { |
| 26 | $env = $this->env; |
| 27 | $this->apiKey = $env['apikey']; |
| 28 | } |
| 29 | |
| 30 | protected function build_url( $query, $endpoint = null ) { |
| 31 | $endpoint = apply_filters( 'mwai_openrouter_endpoint', 'https://openrouter.ai/api/v1', $this->env ); |
| 32 | return parent::build_url( $query, $endpoint ); |
| 33 | } |
| 34 | |
| 35 | protected function build_headers( $query ) { |
| 36 | $site_url = apply_filters( 'mwai_openrouter_site_url', get_site_url(), $query ); |
| 37 | $site_name = apply_filters( 'mwai_openrouter_site_name', get_bloginfo( 'name' ), $query ); |
| 38 | if ( $query->apiKey ) { |
| 39 | $this->apiKey = $query->apiKey; |
| 40 | } |
| 41 | if ( empty( $this->apiKey ) ) { |
| 42 | throw new Exception( 'No API Key provided. Please visit the Settings.' ); |
| 43 | } |
| 44 | return array( |
| 45 | 'Content-Type' => 'application/json', |
| 46 | 'Authorization' => 'Bearer ' . $this->apiKey, |
| 47 | 'HTTP-Referer' => $site_url, |
| 48 | 'X-Title' => $site_name, |
| 49 | 'User-Agent' => 'AI Engine', |
| 50 | ); |
| 51 | } |
| 52 | |
| 53 | protected function build_body( $query, $streamCallback = null, $extra = null ) { |
| 54 | $body = parent::build_body( $query, $streamCallback, $extra ); |
| 55 | // Use transforms from OpenRouter docs |
| 56 | $body['transforms'] = ['middle-out']; |
| 57 | $body['usage'] = [ 'include' => true ]; |
| 58 | return $body; |
| 59 | } |
| 60 | |
| 61 | protected function get_service_name() { |
| 62 | return "OpenRouter"; |
| 63 | } |
| 64 | |
| 65 | public function get_models() { |
| 66 | return $this->core->get_engine_models( 'openrouter' ); |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * Requests usage data if streaming was used and the usage is incomplete. |
| 71 | */ |
| 72 | public function handle_tokens_usage( |
| 73 | $reply, |
| 74 | $query, |
| 75 | $returned_model, |
| 76 | $returned_in_tokens, |
| 77 | $returned_out_tokens, |
| 78 | $returned_price = null |
| 79 | ) { |
| 80 | // If streaming is not enabled, we might already have all usage data |
| 81 | $everything_is_set = !is_null( $returned_model ) |
| 82 | && !is_null( $returned_in_tokens ) |
| 83 | && !is_null( $returned_out_tokens ); |
| 84 | |
| 85 | // Clean up the data |
| 86 | $returned_in_tokens = $returned_in_tokens ?? $reply->get_in_tokens( $query ); |
| 87 | $returned_out_tokens = $returned_out_tokens ?? $reply->get_out_tokens(); |
| 88 | $returned_price = $returned_price ?? $reply->get_price(); |
| 89 | |
| 90 | // Record the usage in the database |
| 91 | $usage = $this->core->record_tokens_usage( |
| 92 | $returned_model, |
| 93 | $returned_in_tokens, |
| 94 | $returned_out_tokens, |
| 95 | $returned_price |
| 96 | ); |
| 97 | |
| 98 | // Set the usage back on the reply |
| 99 | $reply->set_usage( $usage ); |
| 100 | } |
| 101 | |
| 102 | public function get_price( Meow_MWAI_Query_Base $query, Meow_MWAI_Reply $reply ) { |
| 103 | $price = $reply->get_price(); |
| 104 | return is_null( $price ) ? parent::get_price( $query, $reply ) : $price; |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * Retrieve the models from OpenRouter, adding tags/features accordingly. |
| 109 | */ |
| 110 | public function retrieve_models() { |
| 111 | |
| 112 | // 1. Get the list of models supporting "tools" |
| 113 | $toolsModels = $this->get_supported_models( 'tools' ); |
| 114 | |
| 115 | // 2. Retrieve the full list of models |
| 116 | $url = 'https://openrouter.ai/api/v1/models'; |
| 117 | $response = wp_remote_get( $url ); |
| 118 | if ( is_wp_error( $response ) ) { |
| 119 | throw new Exception( 'AI Engine: ' . $response->get_error_message() ); |
| 120 | } |
| 121 | $body = json_decode( $response['body'], true ); |
| 122 | if ( !isset( $body['data'] ) || !is_array( $body['data'] ) ) { |
| 123 | throw new Exception( 'AI Engine: Invalid response for the list of models.' ); |
| 124 | } |
| 125 | |
| 126 | $models = array(); |
| 127 | foreach ( $body['data'] as $model ) { |
| 128 | |
| 129 | // Basic defaults |
| 130 | $family = 'n/a'; |
| 131 | $maxCompletionTokens = 4096; |
| 132 | $maxContextualTokens = 8096; |
| 133 | $priceIn = 0; |
| 134 | $priceOut = 0; |
| 135 | |
| 136 | // Family from model ID (e.g. "openai/gpt-4/32k" -> "openai") |
| 137 | if ( isset( $model['id'] ) ) { |
| 138 | $parts = explode( '/', $model['id'] ); |
| 139 | $family = $parts[0] ?? 'n/a'; |
| 140 | } |
| 141 | |
| 142 | // maxCompletionTokens |
| 143 | if ( isset( $model['top_provider']['max_completion_tokens'] ) ) { |
| 144 | $maxCompletionTokens = (int) $model['top_provider']['max_completion_tokens']; |
| 145 | } |
| 146 | |
| 147 | // maxContextualTokens |
| 148 | if ( isset( $model['context_length'] ) ) { |
| 149 | $maxContextualTokens = (int) $model['context_length']; |
| 150 | } |
| 151 | |
| 152 | // Pricing |
| 153 | if ( isset( $model['pricing']['prompt'] ) && $model['pricing']['prompt'] > 0 ) { |
| 154 | $priceIn = $this->truncate_float( floatval( $model['pricing']['prompt'] ) * 1000 ); |
| 155 | } |
| 156 | if ( isset( $model['pricing']['completion'] ) && $model['pricing']['completion'] > 0 ) { |
| 157 | $priceOut = $this->truncate_float( floatval( $model['pricing']['completion'] ) * 1000 ); |
| 158 | } |
| 159 | |
| 160 | // Basic features and tags |
| 161 | $features = [ 'completion' ]; |
| 162 | $tags = [ 'core', 'chat' ]; |
| 163 | |
| 164 | // If the name contains (beta), (alpha) or (preview), add 'preview' tag and remove from name |
| 165 | if ( preg_match( '/\((beta|alpha|preview)\)/i', $model['name'] ) ) { |
| 166 | $tags[] = 'preview'; |
| 167 | $model['name'] = preg_replace( '/\((beta|alpha|preview)\)/i', '', $model['name'] ); |
| 168 | } |
| 169 | |
| 170 | // If model supports tools |
| 171 | if ( in_array( $model['id'], $toolsModels, true ) ) { |
| 172 | $tags[] = 'functions'; |
| 173 | $features[] = 'functions'; |
| 174 | } |
| 175 | |
| 176 | // Check if the model supports "vision" (if "image" is in the left side of the arrow) |
| 177 | // e.g. "text+image->text" or "image->text" |
| 178 | $modality = $model['architecture']['modality'] ?? ''; |
| 179 | $modality_lc = strtolower( $modality ); |
| 180 | if ( |
| 181 | strpos( $modality_lc, 'image->' ) !== false || |
| 182 | strpos( $modality_lc, 'image+' ) !== false || |
| 183 | strpos( $modality_lc, '+image->' ) !== false |
| 184 | ) { |
| 185 | // Means it can handle images as input, so we consider that "vision" |
| 186 | $tags[] = 'vision'; |
| 187 | } |
| 188 | |
| 189 | $models[] = array( |
| 190 | 'model' => $model['id'] ?? '', |
| 191 | 'name' => trim( $model['name'] ?? '' ), |
| 192 | 'family' => $family, |
| 193 | 'features' => $features, |
| 194 | 'price' => array( |
| 195 | 'in' => $priceIn, |
| 196 | 'out' => $priceOut, |
| 197 | ), |
| 198 | 'type' => 'token', |
| 199 | 'unit' => 1 / 1000, |
| 200 | 'maxCompletionTokens' => $maxCompletionTokens, |
| 201 | 'maxContextualTokens' => $maxContextualTokens, |
| 202 | 'tags' => $tags, |
| 203 | ); |
| 204 | } |
| 205 | |
| 206 | return $models; |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * Return an array of model IDs that support a certain feature (e.g. "tools"). |
| 211 | */ |
| 212 | private function get_supported_models( $feature ) { |
| 213 | // Make a request to get models supporting that feature |
| 214 | $url = 'https://openrouter.ai/api/v1/models?supported_parameters=' . urlencode( $feature ); |
| 215 | $response = wp_remote_get( $url ); |
| 216 | if ( is_wp_error( $response ) ) { |
| 217 | Meow_MWAI_Logging::error( "OpenRouter: Failed to retrieve models for '$feature': " . $response->get_error_message() ); |
| 218 | return array(); |
| 219 | } |
| 220 | $body = json_decode( $response['body'], true ); |
| 221 | if ( !isset( $body['data'] ) || !is_array( $body['data'] ) ) { |
| 222 | Meow_MWAI_Logging::error( "OpenRouter: Invalid response for '$feature' models." ); |
| 223 | return array(); |
| 224 | } |
| 225 | |
| 226 | $modelIDs = array(); |
| 227 | foreach ( $body['data'] as $m ) { |
| 228 | if ( isset( $m['id'] ) ) { |
| 229 | $modelIDs[] = $m['id']; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | return $modelIDs; |
| 234 | } |
| 235 | |
| 236 | /** |
| 237 | * Utility function to truncate a float to a specific precision. |
| 238 | */ |
| 239 | private function truncate_float( $number, $precision = 4 ) { |
| 240 | $factor = pow( 10, $precision ); |
| 241 | return floor( $number * $factor ) / $factor; |
| 242 | } |
| 243 | } |
| 244 |