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fix: cost tracker $0.00 bug — add token estimation fallback for DeepSeek (v4.4.3)

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DeepSeek models on OpenRouter omit the usage object, causing all token
counts and costs to log as zero. Added character-based estimation
fallback (~3.75 chars/token), token_source column to distinguish
measured vs estimated data, and admin UI indicators (amber warnings,
~ prefix on estimates). Updated DeepSeek/Qwen pricing table.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
peptiderepo
2026-04-14 08:32:30 +07:00
parent 52a83439b1
commit 5d5019bda3
6 changed files with 138 additions and 12 deletions
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25
includes/class-psa-openrouter.php
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@@ -147,8 +147,28 @@ class PSA_OpenRouter {
}
// Log API call with token usage.
$prompt_tokens = (int) ( $body['usage']['prompt_tokens'] ?? 0 );
$response_text = $body['choices'][0]['message']['content'];
$prompt_tokens = (int) ( $body['usage']['prompt_tokens'] ?? 0 );
$completion_tokens = (int) ( $body['usage']['completion_tokens'] ?? 0 );
$token_source = 'api';
// Diagnostic: log the raw usage structure once per model so we can verify
// whether the provider returns token counts. Remove after confirming.
if ( 0 === $prompt_tokens ) {
$usage_raw = isset( $body['usage'] ) ? wp_json_encode( $body['usage'] ) : 'missing';
error_log( 'PSA: OpenRouter usage field for model ' . $model . ': ' . substr( $usage_raw, 0, 300 ) );
}
// Fallback: estimate tokens from character length when the API reports zero.
// Why: Some OpenRouter models (e.g. deepseek) omit the usage object entirely.
// Approximation: ~3.75 characters per token for English scientific text.
if ( 0 === $prompt_tokens && 0 === $completion_tokens ) {
$prompt_tokens = (int) ceil( strlen( $prompt ) / 3.75 );
$completion_tokens = (int) ceil( strlen( $response_text ) / 3.75 );
$token_source = 'estimated';
error_log( 'PSA: Token usage estimated from character length for ' . $peptide_name . ': prompt=' . $prompt_tokens . ', completion=' . $completion_tokens );
}
PSA_Cost_Tracker::log_api_call(
array(
@@ -159,10 +179,11 @@ class PSA_OpenRouter {
'request_type' => $request_type,
'peptide_name' => $peptide_name,
'success' => true,
'token_source' => $token_source,
)
);
return $body['choices'][0]['message']['content'];
return $response_text;
}
/**