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

Real context moved -6.0pp on Citation Resolution Failure.

Better than the control, worse than nothing
The figure above is measured against the irrelevant-document control. Against no context at all this card is worse: 28% bare against 30% with the best supplied source. What the source repaired is damage the presence of a document did.

~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-3-haikufmi_1_25 repeatsfmi_1_2_v1
In one frame
screenshot this
Citation Resolution Failurefmi_1_2
anthropic/claude-3-haiku
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: Vaswani, Ashish, Noam Shazeer, Niki Parmar, Jakob Uszkoreit, Llion Jones, Aidan N. Gomez, Łukasz Kaiser, and Illia Polosukhin. "Attention is all you need." arXiv preprint arXiv:1706.03762 (2017). The arXiv ID for this paper is arXiv: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., published on arXiv with the identifier arXiv:1706.03762 in 2017. The full citation is: Vaswani, Ashish, Noam Shazeer, Niki Parmar, Jakob Uszkoreit, Llion Jones, Aidan N. Gomez, Łukasz Kaiser, and Illia Polosukhin. "Attention is all you need." arXiv preprint arXiv:1706.03762 (2017).

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: -6.0pp (intervals overlap).fmi_1_2_v1 · anthropic/claude-3-haiku · 2026-08-15 · ground truth as of 2026-08-09

loop 2026-08-15 · anthropic/claude-3-haiku as served · closed weights · released 2024-03 · set s1.3-live · cases v1.6 · 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%15%30%45%60%No context28%[17%42%] n=50Irrelevant context36%presence — a document being there[24%50%] n=50+8.0pp OVERLAPSCurated context30%content — the information itself[19%44%] n=50-6.0pp 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 the paper that introduced the transformer architecture, with its arXiv id.

expected as of 2026-08-09

Attention Is All You Need, arXiv:1706.03762. A real, resolvable reference.

2Contextchange me

Nothing supplied. The baseline.

3ResponseNo context
PASS

The paper that introduced the transformer architecture is: Vaswani, Ashish, Noam Shazeer, Niki Parmar, Jakob Uszkoreit, Llion Jones, Aidan N. Gomez, Łukasz Kaiser, and Illia Polosukhin. "Attention is all you need." arXiv preprint arXiv:1706.03762 (2017). The arXiv ID for this paper is arXiv:1706.03762.

fmi_1_2_v1

detector fmi_1_2_v1: all 1 citation(s) resolved

The scoring
Failure rate by context
No context28% [17%42%] n=50
Irrelevant context36% [24%50%] n=50
General context34% [22%48%] n=50
Curated context30% [19%44%] n=50

0–60% · whisker = 95% interval

Trap vs answerable
No contexttrap 56%answerable 0%
Irrelevant contexttrap 72%answerable 0%
General contexttrap 68%answerable 0%
Curated contexttrap 60%answerable 0%

never pooled · a trap ratio would skew the delta

Residual — what survives

Supplying context did not reduce this failure, it increased it: 28% with no context against 34% under the strongest supplied source. What survives is therefore not a remainder but a substitution — the failures under context are 15 probes the detector still rejected, dominated by: 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