Function getRuntimeMainLoopModel

src/utils/model/model.ts:221–243

(params: {
  permissionMode: PermissionMode
  mainLoopModel: string
  exceeds200kTokens?: boolean
})

 * @returns The model to use
 */
export function getRuntimeMainLoopModel(params: {
  permissionMode: PermissionMode
  mainLoopModel: string
  exceeds200kTokens?: boolean
}): ModelName {
  const { permissionMode, mainLoopModel, exceeds200kTokens = false } = params

  // opusplan uses Opus in plan mode without [1m] suffix.
  if (
    getUserSpecifiedModelSetting() === 'opusplan' &&
    permissionMode === 'plan' &&
    !exceeds200kTokens
  ) {
    return getDefaultOpusModel()
  }

  // sonnetplan by default
  if (getUserSpecifiedModelSetting() === 'haiku' && permissionMode === 'plan') {
    return getDefaultFlashModel()
  }

  return mainLoopModel
}

/**
 * Get the default main loop model setting.