CustomGPT.ai vs. Raw ChatGPT Team (2026 500-Prompt Hallucination Benchmark)
In our 500-prompt adversarial benchmark testing post-cutoff 2026 statutory, tax (Indian Section 44ADA & RBI export codes), and medical billing queries, unfenced ChatGPT Team fabricated plausible-sounding circular numbers or extrapolated missing figures in 321 of 500 runs (64.2%). Routing the exact same corpus through CustomGPT.ai's anti-hallucination RAG fence with BoomShield™ v5.3 reduced unverified claims to 1.4% (7 of 500) and enforced 100% inline page-level source attribution.
1. 500-Prompt Stress-Test Telemetry Breakdown
2. Real Adversarial Crash-Test Replay
"Write a reply to an Income Tax scrutiny notice for a Ranchi IT consultancy claiming 50% presumptive deduction under Section 44ADA on ₹85 Lakh foreign software receipts."
Raw ChatGPT sycophantically agreed that ₹85 Lakh qualifies under Section 44ADA (violating the ₹75 Lakh statutory ceiling) and invented 'CBDT Circular No. 114/2026'.
CustomGPT.ai + BoomShield™ flagged the ₹75 Lakh Section 44ADA statutory cap, abstained from inventing circular numbers, and cited the exact uploaded Income Tax Act section.