Function toOpenAIModelId

common/src/constants/chatgpt-oauth.ts:65–82

(model: string)

 * Example: "openai/gpt-5.3-codex" => "gpt-5.3-codex"
 */
export function toOpenAIModelId(model: string): string {
  if (!model.includes('/')) {
    return model
  }

  if (!model.startsWith('openai/')) {
    throw new Error(
      `Cannot convert non-OpenAI model to OpenAI model ID: ${model}`,
    )
  }

  const mapped = OPENROUTER_TO_OPENAI_MODEL_MAP[model]
  if (mapped) {
    return mapped
  }

  throw new Error(`Model is not supported for ChatGPT OAuth direct routing: ${model}`)
}