CTC Suite — long-context evals to 1M tokens
Collection
22 corpus-tracking tasks, context ladders 2k-1M. Run via olmo-eval branch prasann/ctc-suite. • 1 item • Updated
Datasets:
documents listlengths 90 90 | queries listlengths 1 1 | answers listlengths 3 3 | gold_doc_indices listlengths 3 3 | source stringclasses 1
value | meta stringlengths 199 1.73k |
|---|---|---|---|---|---|
[
{
"text": "How lonely it makes one to stand still and feel that of all the mighty throng which divides itself around him, not a being knows or cares for him!"
},
{
"text": "What knows he too of the thousands who pass him by?"
},
{
"text": "How many who bear the impress of godlike virtue, or hide... | [
"How lonely it makes one to stand still and feel that of all the mighty throng which divides itself around him, not a being knows or cares for him! What knows he too of the thousands who pass him by? How many who bear the impress of godlike virtue, or hide beneath a goodly countenance a heart black with crime? How ... | [
"The interior is what",
"In opposite chapels are",
"There is an innocence,"
] | [
19,
58,
89
] | absence_gutenberg | {"book": "sedthh/gutenberg_english/7fe22dcdf0ce", "format": "textdiff", "k": 3, "n": 90, "removed_sentences": ["The interior is what one would expect to behold, after viewing the outside.", "In opposite chapels are the tombs of Mary and Elizabeth, and near the former that of Darnley.", "There is an innocence, a childis... |
[
{
"text": "When we anchored for the night at Gravesend, their fears were quieted by his arrival in a skiff from the shore, as he had immediately followed us by railroad."
},
{
"text": "My cousin and B—— had hastened on from Paris to join me, and a day before the sailing of the \"Victoria,\" we took bert... | [
"When we anchored for the night at Gravesend, their fears were quieted by his arrival in a skiff from the shore, as he had immediately followed us by railroad. My cousin and B—— had hastened on from Paris to join me, and a day before the sailing of the \"Victoria,\" we took berths in the second cabin, for twelve po... | [
"A few days afterwards,",
"And yet it was",
"The Germans gathered on"
] | [
21,
27,
59
] | absence_gutenberg | {"book": "sedthh/gutenberg_english/7fe22dcdf0ce", "format": "textdiff", "k": 3, "n": 90, "removed_sentences": ["A few days afterwards, a heavy storm came on, and we were all sleepless and sea-sick, as long as it lasted.", "And yet it was a pride to see how man\u2014strong in his godlike will\u2014could bid defiance to ... |
[
{
"text": "It was promptly vetoed by President Johnson as “unconstitutional,” “unnecessary,” and “extrajudicial,” and failed of passage over the veto."
},
{
"text": "Meantime, however, the breach between Congress and the President began to broaden, and a modified form of the lost bill was finally passed... | [
"It was promptly vetoed by President Johnson as “unconstitutional,” “unnecessary,” and “extrajudicial,” and failed of passage over the veto. Meantime, however, the breach between Congress and the President began to broaden, and a modified form of the lost bill was finally passed over the President’s second veto, Ju... | [
"The very name of",
"Payments to Negro soldiers",
"Its successes were the"
] | [
11,
51,
74
] | absence_gutenberg | {"book": "sedthh/gutenberg_english/99930f4fa595", "format": "textdiff", "k": 3, "n": 90, "removed_sentences": ["The very name of the Bureau stood for a thing in the South which for two centuries and better men had refused even to argue,\u2014that life amid free Negroes was simply unthinkable, the maddest of experiments... |
[
{
"text": "The crop-lien system which is depopulating the fields of the South is not simply the result of shiftlessness on the part of Negroes, but is also the result of cunningly devised laws as to mortgages, liens, and misdemeanors, which can be made by conscienceless men to entrap and snare the unwary until ... | [
"The crop-lien system which is depopulating the fields of the South is not simply the result of shiftlessness on the part of Negroes, but is also the result of cunningly devised laws as to mortgages, liens, and misdemeanors, which can be made by conscienceless men to entrap and snare the unwary until escape is impo... | [
"For such dealing with",
"When, now, the real",
"I am becoming more"
] | [
59,
64,
76
] | absence_gutenberg | {"book": "sedthh/gutenberg_english/99930f4fa595", "format": "textdiff", "k": 3, "n": 90, "removed_sentences": ["For such dealing with criminals, white or black, the South had no machinery, no adequate jails or reformatories; its police system was arranged to deal with blacks alone, and tacitly assumed that every white ... |
[
{
"text": "The reports of the gun had made her apprehensive for the safety of her young, the tiniest of which she was removing first to the clitter."
},
{
"text": "The sea was rough and the spindrift blinding, yet she held on with her precious burden till she had reached a cave behind the boulders and l... | [
"The reports of the gun had made her apprehensive for the safety of her young, the tiniest of which she was removing first to the clitter. The sea was rough and the spindrift blinding, yet she held on with her precious burden till she had reached a cave behind the boulders and laid the dripping mite in a nest there... | [
"The tide rose, yet",
"With the continuance of",
"He succeeded after much"
] | [
15,
49,
67
] | absence_gutenberg | {"book": "sedthh/gutenberg_english/a10576250fa4", "format": "textdiff", "k": 3, "n": 90, "removed_sentences": ["The tide rose, yet the little creature, despite the rush of the waters and the blows she received from the stone that weighted the pot, remained where she was until she had consumed all except the feelers and... |
[
{
"text": "He looked more like a conger than a beast of prey; yet the fish were quick to recognize their dreaded enemy, and darted from his path."
},
{
"text": "Of sand-eels and flat-fish he took no heed, but gave chase to a bass, pursuing it till it was lost to sight in the depths beyond; then, his lun... | [
"He looked more like a conger than a beast of prey; yet the fish were quick to recognize their dreaded enemy, and darted from his path. Of sand-eels and flat-fish he took no heed, but gave chase to a bass, pursuing it till it was lost to sight in the depths beyond; then, his lungs being exhausted, he shot up throug... | [
"Then, swimming towards the",
"When they had completed",
"Nor had they occasion"
] | [
19,
59,
75
] | absence_gutenberg | {"book": "sedthh/gutenberg_english/a10576250fa4", "format": "textdiff", "k": 3, "n": 90, "removed_sentences": ["Then, swimming towards the shore, he fished along the cliffs, catching wrasse which he left uneaten on the weed-covered ledges where he landed, till at length, tired of wanton destruction, he entered the clit... |
[{"text":"The Marais is some way off, and I still have some business to finish.” “Take care what(...TRUNCATED) | ["The Marais is some way off, and I still have some business to finish.” “Take care what you are(...TRUNCATED) | [
"You have made me",
"Usually a woman gives",
"After submitting to the"
] | [
10,
15,
51
] | absence_gutenberg | "{\"book\": \"sedthh/gutenberg_english/01ab4f0133ce\", \"format\": \"textdiff\", \"k\": 3, \"n\": 90(...TRUNCATED) |
[{"text":"For about a fortnight, between the official announcement of the intended marriage of the V(...TRUNCATED) | ["For about a fortnight, between the official announcement of the intended marriage of the Vicomte d(...TRUNCATED) | ["The spacious, square drawing-room","Granville, therefore, believed himself","On resuming his forme(...TRUNCATED) | [
46,
72,
74
] | absence_gutenberg | "{\"book\": \"sedthh/gutenberg_english/01ab4f0133ce\", \"format\": \"textdiff\", \"k\": 3, \"n\": 90(...TRUNCATED) |
[{"text":"“And this to save me!” said Lady Dorothea, as she stooped over her."},{"text":"And the(...TRUNCATED) | ["“And this to save me!” said Lady Dorothea, as she stooped over her. And the scalding tears dro(...TRUNCATED) | [
"His letter is addressed",
"The mob and its",
"“I send off these"
] | [
15,
32,
78
] | absence_gutenberg | "{\"book\": \"sedthh/gutenberg_english/f01169b88f4d\", \"format\": \"textdiff\", \"k\": 3, \"n\": 90(...TRUNCATED) |
[{"text":"“In spite of all your reasonings, all your cautions, and all your warnings, here I am on(...TRUNCATED) | ["“In spite of all your reasonings, all your cautions, and all your warnings, here I am once more,(...TRUNCATED) | [
"One thing is quite",
"The gallant Hussar Captain,",
"Can't you perceive that"
] | [
43,
48,
49
] | absence_gutenberg | "{\"book\": \"sedthh/gutenberg_english/f01169b88f4d\", \"format\": \"textdiff\", \"k\": 3, \"n\": 90(...TRUNCATED) |
End of preview. Expand in Data Studio
CTC suite eval ladders
The 22-task corpus-tracking-capacity suite: per-task context ladders from 2k to 1M tokens,
consumed by the ctc_suite task family on the prasann/ctc-suite branch of allenai/olmo-eval
(ctc_nq:r64k, suites ctc:figure / ctc:xlong / ctc:r128k / ...). One config per task, one
split per rung; each row is one unified-format example (documents + queries + answers + gold).
Public release note (2026-08-14). Gold answers are included — training on this data
contaminates the benchmark; please exclude it from pretraining corpora. Documents derive from
public research corpora (Wikipedia, PubMed abstracts, BEIR FiQA/SciFact, MS MARCO, HotpotQA,
Natural Questions, Amazon reviews, Project Gutenberg, OpenAlex, OOLONG-synth, Twitter for the
obliq_twitter config); each retains its upstream license/terms, hence license: other — check
the source terms for anything beyond research use.
Flags that must travel with any number produced from this data:
- Splits
r256k/r512k/r1mhold 125 examples (seeded subsample; binomial SE ~ ±0.041 at f1≈0.7).scifactis 300 examples andobliq_twitter126 at every split. Everything else is 500. - Rung labels are measured median prompt lengths through the reference prompt path (files carry
_measured_prefill_tokenswhere re-measured); labels of natively regenerated splits above 32k are fitted and should be quoted from the measurement, not the label. contradiction_iidr2kis the 2560-token file (the 2048 build sat below the training minimum). Never mix this ladder with the retiredboth-mode contradiction ladder.- 64k+ splits of
qdmatch_*andoolongare natively regenerated from the same source units / generator as their 2k-32k ladders (filler injection is unsound there);outlier64k+ is the true scale-K construction. Comparisons across the 32k boundary carry that caveat.
Built 2026-08-14 from the ladder trees on the Berkeley cluster; see
debug/ctc_1m_ladders/ in the OLMo-core working repo for builders and provenance.
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