Amp's Dial modes now use only OpenAI models when you link a ChatGPT subscription, eliminating confusion about which tokens are billed where. Low mode switches from GLM-5.2 to GPT-5.6 Terra, while high mode now uses GPT-5.6 Sol for both agent and oracle instead of Claude Fable. Thread reader and code review also move to GPT-5.6 Terra, and high mode drops its credit minimum with an active subscription. Ultra mode remains unchanged, still using Claude Fable on credits for maximum capability. Users without a subscription see no changes.