Relays & gateways2026-10-194 min Claude Code ANTHROPIC_BASE_URL: 1M Context and Permission DefaultsSince 2.1.285, custom ANTHROPIC_BASE_URL sessions get the model's 1M context and allowedProviders is new; 2.1.302 changed -p defaults. A 4-step check. #Claude Code#ANTHROPIC_BASE_URL#1M context#permission mode