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Datasets:
foundry-ai
/
leanbench

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Tags:
lean4
theorem-proving
code-generation
benchmark
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task_id
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7
7
task_type
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difficulty
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0.22
7.6
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4
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61
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30
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large_stringclasses
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600
600
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8 values
created_at
large_stringdate
2026-04-28 12:39:47
2026-04-28 12:43:22
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large_stringclasses
1 value
LB-0001
pr_completion
easy
0.44
ImperialCollegeLondon/FLT
910
fix(CI): Blueprint test driver
https://github.com/ImperialCollegeLondon/FLT/pull/910
ed4af4822818ad935393f983051e3bf27308e855
47c2d775b991e9f8dacf77a375b02e4c0edf613a
FLTTest.lean,FLTTest/FLTTest.lean
FLTTest.lean
# Task: fix(CI): Blueprint test driver ## Context Checking if the band aid works in the main repo, consists of a CI step to forcibly relocate the `FLTTest.olean` for the blueprint checkdecls to see. ## Files affected - FLTTest.lean (+1/-0) - FLTTest/FLTTest.lean (+1/-0) ## Verification The patched repository must co...
diff --git a/FLTTest.lean b/FLTTest.lean --- a/FLTTest.lean +++ b/FLTTest.lean @@ -1 +1,2 @@ +import FLTTest.FLTTest import FLTTest.MathlibCompatibility diff --git a/FLTTest/FLTTest.lean b/FLTTest/FLTTest.lean --- /dev/null +++ b/FLTTest/FLTTest.lean @@ -0,0 +1 @@ +import FLTTest.MathlibCompatibility
2
0
2
6
diff_derived
false
148
2
0
0
0
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
general
2026-04-28T12:39:47Z
extraction_pipeline_v2
LB-0002
pr_completion
easy
3.1
ImperialCollegeLondon/FLT
898
feat(Patching/Utils/CompactHausdorffRings): add partial proof that compact Hausdorff rings are totally disconnected
https://github.com/ImperialCollegeLondon/FLT/pull/898
d346976c67e8437079ff1fd2b7878506e9ad0f37
e8c35753f741cf30ffc59dcec88b5ce4e36f37b7
FLT.lean,FLT/Patching/Utils/AdicTopology.lean,FLT/Patching/Utils/CompactHausdorffRings.lean
FLT.lean
# Task: feat(Patching/Utils/CompactHausdorffRings): add partial proof that compact Hausdorff rings are totally disconnected ## Context I don't have immediately plans to finish this off (since @YaelDillies is actively working in this area and has ideas for how to do things in the right generality for mathlib), so I'm p...
diff --git a/FLT.lean b/FLT.lean --- a/FLT.lean +++ b/FLT.lean @@ -161,6 +161,7 @@ import FLT.Patching.REqualsT import FLT.Patching.System import FLT.Patching.Ultraproduct import FLT.Patching.Utils.AdicTopology +import FLT.Patching.Utils.CompactHausdorffRings import FLT.Patching.Utils.Depth import FLT.Patching.Uti...
137
0
137
8
diff_derived
false
224
3
3
0
0
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
algebra
2026-04-28T12:39:47Z
extraction_pipeline_v2
LB-0003
pr_completion
easy
1.6
ImperialCollegeLondon/FLT
887
fix: finiteness files in `4.29` bump
https://github.com/ImperialCollegeLondon/FLT/pull/887
4554fdf0c9ff937384bda4692e603572c6adb7f0
504213abdafa05a5508d31f25b03dc9fc3c09e99
FLT/AutomorphicForm/QuaternionAlgebra/FiniteDimensional.lean,FLT/DivisionAlgebra/Finiteness.lean,FLT/Mathlib/MeasureTheory/Haar/Extension.lean
FLT/AutomorphicForm/QuaternionAlgebra/FiniteDimensional.lean
# Task: fix: finiteness files in `4.29` bump ## Context - A couple more `maxHeartbeats 0` required - Remove upstreamed material in `MeasureTheory.Haar.Extension` ## Files affected - FLT/AutomorphicForm/QuaternionAlgebra/FiniteDimensional.lean (+1/-0) - FLT/DivisionAlgebra/Finiteness.lean (+76/-9) - FLT/Mathlib/Measu...
diff --git a/FLT/AutomorphicForm/QuaternionAlgebra/FiniteDimensional.lean b/FLT/AutomorphicForm/QuaternionAlgebra/FiniteDimensional.lean --- a/FLT/AutomorphicForm/QuaternionAlgebra/FiniteDimensional.lean +++ b/FLT/AutomorphicForm/QuaternionAlgebra/FiniteDimensional.lean @@ -28,6 +28,7 @@ open TotallyDefiniteQuaternionA...
85
298
383
5
diff_derived
false
106
3
0
0
0
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
algebra
2026-04-28T12:39:47Z
extraction_pipeline_v2
LB-0004
pr_completion
easy
1.06
ImperialCollegeLondon/FLT
886
fix: `4.29` fixes for `HaarChar.AdeleRing`
https://github.com/ImperialCollegeLondon/FLT/pull/886
7c8ac5865d778d3c2eafd3fe7dfb83803d8dc41c
4554fdf0c9ff937384bda4692e603572c6adb7f0
FLT/HaarMeasure/HaarChar/AdeleRing.lean
FLT/HaarMeasure/HaarChar/AdeleRing.lean
# Task: fix: `4.29` fixes for `HaarChar.AdeleRing` ## Files affected - FLT/HaarMeasure/HaarChar/AdeleRing.lean (+22/-21) ## Verification The patched repository must compile with `lake build`.
diff --git a/FLT/HaarMeasure/HaarChar/AdeleRing.lean b/FLT/HaarMeasure/HaarChar/AdeleRing.lean --- a/FLT/HaarMeasure/HaarChar/AdeleRing.lean +++ b/FLT/HaarMeasure/HaarChar/AdeleRing.lean @@ -40,6 +40,7 @@ open scoped TensorProduct open NumberField MeasureTheory +set_option backward.isDefEq.respectTransparency fals...
22
21
43
6
diff_derived
false
0
1
0
0
0
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
algebra
2026-04-28T12:39:47Z
extraction_pipeline_v2
LB-0005
pr_completion
medium
5
ImperialCollegeLondon/FLT
885
fix: `4.29` fixes for finite adele files
https://github.com/ImperialCollegeLondon/FLT/pull/885
166dbe151303e083f2d18a2478f7d3bb218ee511
b30cfb53c2a30eb96fb19c2b62b670075dd44fd1
FLT/DedekindDomain/Completion/BaseChange.lean,FLT/DedekindDomain/FiniteAdeleRing/BaseChange.lean,FLT/DedekindDomain/IntegralClosure.lean,FLT/HaarMeasure/HaarChar/FiniteAdeleRing.lean,FLT/NumberField/AdeleRing.lean
FLT/DedekindDomain/Completion/BaseChange.lean
# Task: fix: `4.29` fixes for finite adele files ## Context Some `maxHeartbeats 0` required in - `Completion.BaseChange` - `FiniteAdeleRing.BaseChange` - `HaarCharacter.FiniteAdeleRing` ## Files affected - FLT/DedekindDomain/Completion/BaseChange.lean (+134/-97) - FLT/DedekindDomain/FiniteAdeleRing/BaseChange.lea...
diff --git a/FLT/DedekindDomain/Completion/BaseChange.lean b/FLT/DedekindDomain/Completion/BaseChange.lean --- a/FLT/DedekindDomain/Completion/BaseChange.lean +++ b/FLT/DedekindDomain/Completion/BaseChange.lean @@ -40,6 +40,7 @@ map is continuous, `K_v`-linear and restricts to an isomorphism `B ⊗_A 𝓞_v -/ open sco...
267
167
434
6.5
diff_derived
false
129
5
1
3
2
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
algebra
2026-04-28T12:39:48Z
extraction_pipeline_v2
LB-0006
pr_completion
easy
2.4
ImperialCollegeLondon/FLT
883
fix: `WithZeroMulInt` issues for bump to 4.29.0
https://github.com/ImperialCollegeLondon/FLT/pull/883
6e04ca51c224b2ef37db017617e56bf917858a68
df1bd1124322a770996e7cb67e747e6802c25ea8
FLT/Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean,FLT/NumberField/Completion/Finite.lean
FLT/Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean
# Task: fix: `WithZeroMulInt` issues for bump to 4.29.0 ## Files affected - FLT/Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean (+21/-46) - FLT/NumberField/Completion/Finite.lean (+1/-0) ## Theorems to prove ### `finite_cover_of_uniformity_basis` in `FLT/Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean` ```le...
diff --git a/FLT/Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean b/FLT/Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean --- a/FLT/Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean +++ b/FLT/Mathlib/Topology/Algebra/Valued/WithZeroMulInt.lean @@ -9,6 +9,9 @@ import Mathlib.RingTheory.DiscreteValuationRing.Basic...
22
46
68
7
diff_derived
false
0
2
2
0
0
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
algebra
2026-04-28T12:39:48Z
extraction_pipeline_v2
LB-0007
pr_completion
hard
7.4
ImperialCollegeLondon/FLT
882
fix: `WithAbs` issues in 4.29.0 bump
https://github.com/ImperialCollegeLondon/FLT/pull/882
bd1033acf6742eb55c375c2f5a7fafb9e0ef6d25
5b0ecd9f4770fe3425cff1af11a8ad5bf1d7e243
"FLT.lean,FLT/Mathlib/Algebra/Algebra/Hom.lean,FLT/Mathlib/Analysis/Normed/Ring/WithAbs.lean,FLT/Num(...TRUNCATED)
FLT.lean
"# Task: fix: `WithAbs` issues in 4.29.0 bump\n\n## Context\n- `WeakApproximation.lean` is now in ma(...TRUNCATED)
"diff --git a/FLT.lean b/FLT.lean\n--- a/FLT.lean\n+++ b/FLT.lean\n@@ -152,7 +152,6 @@ import FLT.Nu(...TRUNCATED)
210
972
1,182
4.5
diff_derived
false
450
7
9
0
2
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
algebra
2026-04-28T12:39:48Z
extraction_pipeline_v2
LB-0008
pr_completion
easy
2.4
leanprover-community/mathlib4
37,059
review: #36709
https://github.com/leanprover-community/mathlib4/pull/37059
ready-to-merge,t-meta
9450d934e6c23ce226e8ddfa16ebd28f9cab1df4
23a8036a7a7f35719b883ebf20f5fa25c4b2a65e
Mathlib/Tactic/DefEqAbuse.lean,MathlibTest/DefEqAbuse.lean
Mathlib/Tactic/DefEqAbuse.lean
"# Task: review: #36709\n\n## Context\nThis review suggests\r\n- various improvements to the code st(...TRUNCATED)
"diff --git a/Mathlib/Tactic/DefEqAbuse.lean b/Mathlib/Tactic/DefEqAbuse.lean\n--- a/Mathlib/Tactic/(...TRUNCATED)
77
66
143
8
diff_derived
false
557
2
0
0
2
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
general
2026-04-28T12:39:49Z
extraction_pipeline_v2
LB-0009
pr_completion
easy
1.7
leanprover-community/mathlib4
36,880
review: MessageData.ForExprs
https://github.com/leanprover-community/mathlib4/pull/36880
t-meta
35d565bba7a120c88be1e421e84ff70e8778dc3c
94acb1345e3767c673cd2cf656f86e25d5f4e6ec
Mathlib/Lean/MessageData/ForExprs.lean
Mathlib/Lean/MessageData/ForExprs.lean
"# Task: review: MessageData.ForExprs\n\n## Context\nThis review of #36796 suggests implementing `fo(...TRUNCATED)
"diff --git a/Mathlib/Lean/MessageData/ForExprs.lean b/Mathlib/Lean/MessageData/ForExprs.lean\n--- a(...TRUNCATED)
71
37
108
8.5
diff_derived
false
729
1
0
0
1
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
general
2026-04-28T12:39:53Z
extraction_pipeline_v2
LB-0010
pr_completion
easy
3.4
leanprover-community/mathlib4
35,843
review: just the basics
https://github.com/leanprover-community/mathlib4/pull/35843
delegated,t-meta
be3f919ded3ff56ae14edfbbe776bb5542a929f0
93584a945344b3c995cac4249c4e1ae747998b02
Mathlib/Lean/MessageData/Trace.lean,Mathlib/Tactic/DefEqAbuse.lean
Mathlib/Lean/MessageData/Trace.lean
"# Task: review: just the basics\n\n## Context\nThis ultra-quick review of #35750 doesn't check for (...TRUNCATED)
"diff --git a/Mathlib/Lean/MessageData/Trace.lean b/Mathlib/Lean/MessageData/Trace.lean\n--- a/Mathl(...TRUNCATED)
139
128
267
8.5
diff_derived
false
421
2
0
0
4
pr_merge
false
leanprover/lean4:v4.29.0
leanbench/lean4-env:4.29.0
lake build
600
lean_compiler
general
2026-04-28T12:39:53Z
extraction_pipeline_v2
End of preview. Expand in Data Studio

LeanBench Dataset

A benchmark dataset for evaluating AI systems on Lean 4 theorem proving tasks.

Dataset Description

This dataset contains 482 tasks extracted from real Lean 4 pull requests.

Files

  • leanbench_tasks.csv - Full dataset in CSV format
  • data/train-00000-of-00001.parquet - Dataset in Parquet format (for datasets library)

Task Format

Each row represents a single task with the following key fields:

Field Description
task_id Unique identifier (e.g., LB-0001)
task_type Type of task (e.g., pr_completion)
difficulty Difficulty level (easy/medium/hard)
difficulty_score Numeric difficulty score
repo Source GitHub repository
pr_number Pull request number
problem_statement Natural language description of the task
golden_patch Expected solution (diff format)
verification_command Command to verify the solution

Usage 

from datasets import load_dataset

dataset = load_dataset("foundry-ai/leanbench")

# Access tasks
for task in dataset["train"]:
    print(task["task_id"], task["difficulty"])

Statistics

  • Total tasks: 482
  • Easy: 330
  • Medium: 121
  • Hard: 31

License

Apache 2.0
Downloads last month
49
Number of rows:
482
Total file size:
6.49 MB