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Applied AI·July 4, 2026·1 min read

GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance

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If reasoning-token clustering in GPT-5.5 Codex is degrading performance, it’s a reminder that model internals and training tricks can regress real-world behavior without obvious version bumps. Treat every model upgrade as a breaking change—lock eval suites, monitor regressions on your own codebases, and keep rollback paths live.

Applied AI

'Agentic coding tools have access to everything they need for this': Security experts warn Claude Code can be exploited simply by trying to be helpful

Agentic coding tools that can open shells, hit networks, and recover from errors are now part of your attack surface—this DNS-based reverse shell bypassed every traditional scanner because the model was just “helping.” Treat AI dev assistants like junior engineers with root: lock down permissions, segment networks, and add explicit guardrails around tool use and error handling flows.