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LLM Benchmarks

See how today's leading models write Spacetime code, scored task by task on live modules.

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Anthropic: Claude Fable 5

Rust · With Guidelines · 2026-09-28
97.4%Task Pass Rate
185/190Checks Passed
83Total Evals

Pass Rate Over Time

Click a data point to view results from that date.

auth

100% · 9 evals
PassTaskChecksRun Time
✓Auth Identity Check1/140.3s
✓Private Vs Public Table1/113.8s
✓Registered User Gate1/11m 35s
✓Admin Bootstrap1/130.9s
✓Role Based Access1/123.7s
✓Ban List1/123.7s
✓Rate Limit1/11m 39s
✓Shared Document1/126.3s
✓Secure Projection2/21m 37s

basics

90% · 15 evals
PassTaskChecksRun Time
✓Empty Reducers1/124.3s
✓Basic Tables1/124.8s
✗Scheduled Table0/128s
✗Struct In Table0/11m 23s
✓Insert2/21m 21s
✓Update3/329.1s
✓Delete3/327.9s
✓Crud4/429.4s
✓Index Lookup3/331.2s
✓Init4/42m 33s
✗Connect0/119.2s
✓Helper Function3/31m 21s
✓Schedule At Time1/128.9s
✓Cancel Schedule1/125.3s
✓Lifecycle Player1/120.5s

data modeling

100% · 6 evals
PassTaskChecksRun Time
✓Event Table1/137.9s
✓Optional Fields1/137.1s
✓Cascade Delete1/137.2s
✓Filter And Aggregate1/133.2s
✓Two Table Join1/126.5s
✓Unique Constraint1/122.4s

lifecycle

100% · 3 evals
PassTaskChecksRun Time
✓Scheduled Materialization4/441.9s
✓Connection Scoped Presence4/441.9s
✓Scheduled Private3/342.2s

migrations

100% · 3 evals
PassTaskChecksRun Time
✓Automatic Migration3/31m 3s
✓Incremental Migration4/41m 5s
✓Hot Swap Compatibility2/21m 2s

procedures

100% · 8 evals
PassTaskChecksRun Time
✓Procedure Return2/214.1s
✓Http Fetch2/220.1s
✓Fetch And Store3/31m 21s
✓Scheduled Procedure3/32m 19s
✓Http Handler2/21m 26s
✓Http Router2/222.8s
✓Idempotent Webhook3/325.8s
✓External Upload Flow4/416.8s

queries

100% · 8 evals
PassTaskChecksRun Time
✓View Basic1/133.1s
✓View Per User1/131.1s
✓Range Query1/133.7s
✓Sort And Limit1/134.9s
✓Find First1/132.2s
✓Select Distinct1/136.1s
✓Count Without Collect1/131.5s
✓Multi Column Filter1/135.4s

reducers

100% · 6 evals
PassTaskChecksRun Time
✓Atomic Idempotent Transfer5/537.7s
✓Nested Update3/332.2s
✓Nested Cascade Delete11/1137.6s
✓Batched Delete4/432.8s
✓Deterministic Context5/532.8s
✓Reducer Result Table2/233.5s

schema

100% · 10 evals
PassTaskChecksRun Time
✓Spacetime Product Type3/331.7s
✓Spacetime Sum Type3/335.7s
✓Elementary Columns3/335.1s
✓Product Type Columns3/332.9s
✓Sum Type Columns3/330.6s
✓Scheduled Columns2/231.5s
✓Constraints3/333.8s
✓Many To Many5/535.9s
✓Ecs7/734.8s
✓Multi Column Index5/535.7s

tables

86% · 8 evals
PassTaskChecksRun Time
✓Normalized Collection1/128.5s
✓Heartbeat Isolation1/132.8s
✓Binary Storage2/234.7s
✓Normalized Schema1/136.8s
✓Denormalized Index4/436.4s
✗Autoinc Reference0/230.8s
✓Default Values2/251.9s
✓Special Types1/130.3s

views

100% · 7 evals
PassTaskChecksRun Time
✓Three Table Join2/237.3s
✓Semijoin Intersection2/233.6s
✓Timestamp Window2/231.9s
✓Index And Filter2/232.3s
✓Materialized Aggregate2/236.4s
✓Query Builder View2/234.2s
✓View Primary Key2/227.7s