Default Effort Elevation to HIGH

Description

Anthropic decision in v2.1.94 (April 7, 2026) to elevate default reasoning effort from low/medium to HIGH for all users, reversing the thinking-depth regression at the cost of higher per-session compute. Shipped 6 days after Stella Laurenzo filed GitHub #42796 (790 HN points). Directly attributed to community-documented regression pressure.

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Sources

src-20260419-3e34d5830692