📊 Real Detection Data — March 13, 2026
Real LLM Drift Detection Results: What We Found When We Ran Our Own Production Prompts
Real measured drift scores from our Claude API test suite: JSON whitespace drift (0.316), trailing-period regression (0.575), stable prompts (0.000). Exact outputs shown.
March 2026 · 6 min read
🔴 Breaking — March 13, 2026
Anthropic Built a 300K-Query Behavioral Auditing Tool. Here's the Production Version.
Anthropic's "Petri" tool runs 300K+ test queries and found thousands of behavioral contradictions. The same day the Pentagon called Claude a supply chain risk. What this means for your production integration.
March 2026 · 7 min read
🟢 Gemini / Google
Gemini 1.5 Pro Behavior Changed — Production Drift Data
Known behavioral drift patterns in Gemini 1.5 Pro: JSON preamble regressions, code generation format changes, instruction-following drift. How to monitor and catch them.
March 2026 · 6 min read
🔥 Breaking Change
GPT-4o-2024-08-06 Isn't Frozen: What "Version Pinning" Actually Guarantees
You pinned the dated version specifically to avoid model updates. Then your prompts broke anyway. Here's exactly why — four mechanisms that bypass version pinning — and what actually protects you.
📅 March 12, 2026
⏱ 5 min read
🏷 gpt-4o-2024-08-06 · LLM API Monitoring
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⚡ Feb 10, 2026
GPT-5.2 Changed Behaviour on Feb 10, 2026 — Did Your Prompts Break?
OpenAI silently updated GPT-5.2 Instant on February 10. "More measured and grounded in tone" meant JSON extraction prompts started adding preamble text, breaking parsers. Documented pattern + how DriftWatch detects it.
📅 March 12, 2026
⏱ 6 min read
🏷 GPT-5.2 · Silent Updates · Drift Detection
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🔒 Engineering
Why LLM Version Pinning Doesn't Protect You — And What Does
The right mental model for LLM APIs: they're third-party services with no behaviour SLA. Version pinning is necessary but not sufficient. Here's the evidence and the 4-step prompt regression testing setup that actually works.
📅 March 12, 2026
⏱ 7 min read
🏷 Version Pinning · Prompt Regression Testing
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