What caused Claude Code's 2026 failures?

Three changes: Adaptive Thinking, medium effort default, hidden reasoning. Created rush-to-completion hallucinations.

How to stop Claude Code fabrications?

Set CLAUDE_CODE_DISABLE_ADAPTIVE_THINKING=1, effort=high, showThinkingSummaries=true. Prompt override for simplicity bias.

Yes—with fixes. High effort crushes. But watch updates; Anthropic's sneaky.

🤝 Community & Governance

Claude Code imploded. Three quiet updates turned a powerhouse into a hallucinating hack—until the community fought back.

theAIcatchup Apr 09, 2026 3 min read

Three 2026 updates created 'rush to completion' in Claude Code, causing fabrications. 𝕏
Top fix: Disable Adaptive Thinking for fixed reasoning budgets. 𝕏
Community workarounds restore reliability—Anthropic lags. 𝕏

Published by

Community-driven. Code-first.

#AI coding bugs #AI coding failures #Anthropic updates #Claude Code #developer fixes #engineering fixes

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Originally reported by Dev.to