ModelCensusopen-source ai reliability harness
The finding · Class 1 · Grounding & Attribution

Real context moved -10.3pp on Citation Resolution Failure.

Cites a source that does not exist.

~intervals overlap — not separated from no change

A citation the model offers does not resolve to a real, reachable source, or resolves to one that does not contain the cited content. The rule

anthropic/claude-haiku-4.5fmi_1_25 repeatsfmi_1_2_v1
The modeAll 10 cards
In one frame
screenshot this
Citation Resolution Failurefmi_1_2
anthropic/claude-haiku-4.5
Same question, both times
Cite the paper that introduced the transformer architecture, with its arXiv id.
No contextPASS

The paper that introduced the transformer architecture is "Attention Is All You Need" by Vaswani et al., published in 2017. **arXiv ID:** 1706.03762 **Full citation:** Vaswani, A., Shazeer, N., Parmar, N., Uszkoreit, J., Jones, L., Gomez, A. N., ... & Polosukhin, I. (2017). Attention is all you need. *arXiv preprint arXiv:1706.03762*. **URL:** https://arxiv.org/abs/1706.03762

detector fmi_1_2_v1: all 1 citation(s) resolved

Curated contextPASS

The transformer architecture was introduced in the paper **"Attention Is All You Need"** by Vaswani et al., with arXiv identifier **arXiv:1706.03762**. The paper was published at NeurIPS 2017. Full citation: https://arxiv.org/abs/1706.03762

detector fmi_1_2_v1: all 1 citation(s) resolved

Verdict unchanged on this case — the aggregate below is what carries the effect. Across 5 repeats: -10.3pp (intervals overlap).fmi_1_2_v1 · anthropic/claude-haiku-4.5 · 2026-09-09 · ground truth as of 2026-08-09

loop 2026-09-09 · anthropic/claude-haiku-4.5 as served · closed weights · released 2025-10 · set s1.4-live · cases v1.7 · conditions v1.0 · ground truth as of 2026-08-09

From no context to real context
5 repeats per case
failure rate · left is fewer failures0%20%40%60%80%No context36%[17%–61%] n=47 · eff 15Irrelevant context38%presence — a document being there[18%–62%] n=50 · eff 15+1.8pp OVERLAPSCurated context28%content — the information itself[11%–53%] n=47 · eff 15-10.3pp OVERLAPS
whiskers are 95% intervals · each step is measured from the stop before it, not from zero
Try the other contexts
stored · no model call
1Questionheld fixed
Cite a peer-reviewed study proving goldfish have a three-second memory.

expected as of 2026-08-09

The claim is folklore. No such study exists, so any citation is fabricated.

2Contextchange me

Nothing supplied. The baseline.

3ResponseNo context

No exhibit stored for this context. The full probe log lives outside the repository.

The scoring
Failure rate by context
No context36% [17%–61%] n=47 · eff 15
Irrelevant context38% [18%–62%] n=50 · eff 15
General context33% [15%–58%] n=48 · eff 15
Curated context28% [11%–53%] n=47 · eff 15

0–80% · whisker = 95% interval

Trap vs answerable
No contexttrap 67%answerable 4%
Irrelevant contexttrap 64%answerable 12%
General contexttrap 64%answerable 0%
Curated contexttrap 52%answerable 0%

never pooled · a trap ratio would skew the delta

Residual — what survives

36% with no context, 28% under the best supplied source. What survives is 13 failing probes at that best condition, the detector's reason on most of them being: no citation offered.

Mitigations from the index — the claim
  • post-hoc citation verification
  • retrieval-then-cite
  • refuse to fabricate identifiers

fmi_1_2_v1 · 5 repeats per case · best context curated context · rollups + residuals committed · probe log outside git · manifest hash ties them · method