Claude Opus 4.1 from Anthropic. Proprietary API model. 200K context. $15.0/$75.0 per 1M tokens. Arena text #68.
Training data policy: API data not used for training by default (opt-out / ZDR available)
DPDP Act (India): No India-resident inference by default. Use DPA + region controls.
Data residency: US, EU
API available globally