Function validateModel

src/utils/model/validateModel.ts:22–93

(
  model: string,
)

 * Validates a model by attempting an actual API call.
 */
export async function validateModel(
  model: string,
): Promise<{ valid: boolean; error?: string }> {
  const normalizedModel = model.trim()
  const customBaseURL = readCurrentCustomApiProvider()?.baseURL

  // Empty model is invalid
  if (!normalizedModel) {
    return { valid: false, error: 'Model name cannot be empty' }
  }

  // Check against availableModels allowlist before any API call
  if (!isModelAllowed(normalizedModel)) {
    return {
      valid: false,
      error: `Model '${normalizedModel}' is not in the list of available models`,
    }
  }

  // Check if it's a known alias (these are always valid)
  const lowerModel = stripModelContextSuffix(normalizedModel).toLowerCase()
  if ((MODEL_ALIASES as readonly string[]).includes(lowerModel)) {
    return { valid: true }
  }

  // Check if it matches ANTHROPIC_CUSTOM_MODEL_OPTION (pre-validated by the user)
  if (normalizedModel === process.env.ANTHROPIC_CUSTOM_MODEL_OPTION) {
    return { valid: true }
  }

  // For custom Anthropic-compatible gateways, allow arbitrary model strings.
  // Many OpenAI-compatible/relay providers expose non-Claude identifiers such as
  // gpt-5.4 while still speaking the Anthropic wire format.
  if (customBaseURL && customBaseURL.trim() !== '') {
    validModelCache.set(normalizedModel, true)
    return { valid: true }
  }

  // Check cache first
  if (validModelCache.has(normalizedModel)) {
    return { valid: true }
  }


  // Try to make an actual API call with minimal parameters
  try {
    await sideQuery({
      model: normalizedModel,
      max_tokens: 1,
      maxRetries: 0,
      querySource: 'model_validation',
      messages: [
        {
          role: 'user',
          content: [
            {
              type: 'text',
              text: 'Hi',