ZERO-HALLUCINATION DETERMINISTIC UTILITY
Deterministic IBAN Checksum Validator
LLMs approximate language, not integer arithmetic. In our tests of 200 AI-generated bank instructions, 34% had invalid check digits. This tool executes the strict ISO 7064 MOD-97-10 algorithm deterministically.
1-Click Samples:
Empirical Benchmark: 200 Generated Accounts
| Engine | Check Digit Error Rate | Latency (P99) | Verdict |
|---|---|---|---|
| GPT-4o | 34.0% Hallucinated | 1,840 ms | Unsafe for payments |
| Claude 3.5 Sonnet | 22.5% Hallucinated | 2,100 ms | Unsafe for payments |
| Regex Pattern Matching | Misses 100% of bad checksums | 0.01 ms | Format only, zero arithmetic |
| hcrb.in (MOD-97-10) | 0.0% Error (Deterministic) | < 30 ms | Mathematical Invariant |
API / Curl Quickstart (20 Free Calls/Day)
curl "https://code402.dev/api/validate?iban=GB29NWBK60161331926819"