Function modelSupportsEffort

src/utils/effort.ts:23–49

(model: string)

// @[MODEL LAUNCH]: Add the new model to the allowlist if it supports the effort parameter.
export function modelSupportsEffort(model: string): boolean {
  const m = model.toLowerCase()
  if (isEnvTruthy(process.env.CLAUDE_CODE_ALWAYS_ENABLE_EFFORT)) {
    return true
  }
  const supported3P = get3PModelCapabilityOverride(model, 'effort')
  if (supported3P !== undefined) {
    return supported3P
  }
  // Supported by a subset of Claude 4 models
  if (m.includes('opus-4-6') || m.includes('sonnet-4-6')) {
    return true
  }
  // Exclude any other known legacy models (haiku, older opus/sonnet variants)
  if (m.includes('haiku') || m.includes('sonnet') || m.includes('opus')) {
    return false
  }

  // IMPORTANT: Do not change the default effort support without notifying
  // the model launch DRI and research. This is a sensitive setting that can
  // greatly affect model quality and bashing.

  // Default to true for unknown model strings on 1P.
  // Do not default to true for 3P as they have different formats for their
  // model strings (ex. anthropics/claude-code#30795)
  return getAPIProvider() === 'firstParty'
}

// @[MODEL LAUNCH]: Add the new model to the allowlist if it supports 'max' effort.
// Per API docs, 'max' is Opus 4.6 only for public models — other models return an error.