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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

TypeScript · With Guidelines · 2026-09-28
96.3%Task Pass Rate
183/190Checks 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 Check1/17.5s
✓Private Vs Public Table1/113.4s
✓Registered User Gate1/111.8s
✓Admin Bootstrap1/111.7s
✓Role Based Access1/115.7s
✓Ban List1/115.7s
✓Rate Limit1/115.7s
✓Shared Document1/115.7s
✓Secure Projection2/216.2s

basics

100% · 15 evals
PassTaskChecksRun Time
✓Empty Reducers1/114.1s
✓Basic Tables1/112.2s
✓Scheduled Table1/116.8s
✓Struct In Table1/110.8s
✓Insert2/216.8s
✓Update3/318.3s
✓Delete3/313.8s
✓Crud4/412.7s
✓Index Lookup3/319.8s
✓Init4/416.8s
✓Connect1/112.7s
✓Helper Function3/314.1s
✓Schedule At Time1/114.1s
✓Cancel Schedule1/114.1s
✓Lifecycle Player1/119.8s

data modeling

100% · 6 evals
PassTaskChecksRun Time
✓Event Table1/111.7s
✓Optional Fields1/118.2s
✓Cascade Delete1/118.2s
✓Filter And Aggregate1/118.2s
✓Two Table Join1/114.6s
✓Unique Constraint1/111.7s

lifecycle

100% · 3 evals
PassTaskChecksRun Time
✓Scheduled Materialization4/418.2s
✓Connection Scoped Presence4/418.2s
✓Scheduled Private3/318.2s

migrations

100% · 3 evals
PassTaskChecksRun Time
✓Automatic Migration3/324.4s
✓Incremental Migration4/429.6s
✓Hot Swap Compatibility2/224.4s

procedures

100% · 8 evals
PassTaskChecksRun Time
✓Procedure Return2/211.5s
✓Http Fetch2/216s
✓Fetch And Store3/316s
✓Scheduled Procedure3/319.5s
✓Http Handler2/216s
✓Http Router2/216s
✓Idempotent Webhook3/317.5s
✓External Upload Flow4/415.9s

queries

88% · 8 evals
PassTaskChecksRun Time
✓View Basic1/113.3s
✗View Per User0/112s
✓Range Query1/116.6s
✓Sort And Limit1/113.3s
✓Find First1/116.2s
✓Select Distinct1/112.9s
✓Count Without Collect1/112.9s
✓Multi Column Filter1/112.9s

reducers

100% · 6 evals
PassTaskChecksRun Time
✓Atomic Idempotent Transfer5/515s
✓Nested Update3/38.1s
✓Nested Cascade Delete11/1115s
✓Batched Delete4/414.4s
✓Deterministic Context5/57s
✓Reducer Result Table2/27.5s

schema

100% · 10 evals
PassTaskChecksRun Time
✓Spacetime Product Type3/313.7s
✓Spacetime Sum Type3/321.4s
✓Elementary Columns3/318.7s
✓Product Type Columns3/316.5s
✓Sum Type Columns3/321.4s
✓Scheduled Columns2/213.3s
✓Constraints3/313.3s
✓Many To Many5/513.3s
✓Ecs7/721.1s
✓Multi Column Index5/520.9s

tables

100% · 8 evals
PassTaskChecksRun Time
✓Normalized Collection1/121.4s
✓Heartbeat Isolation1/123.2s
✓Binary Storage2/223.6s
✓Normalized Schema1/123.2s
✓Denormalized Index4/421.4s
✓Autoinc Reference2/221.4s
✓Default Values2/224.4s
✓Special Types1/125.7s

views

57% · 7 evals
PassTaskChecksRun Time
✓Three Table Join2/212.7s
✗Semijoin Intersection1/212.7s
✗Timestamp Window1/217.8s
✗Index And Filter1/216.2s
✗Materialized Aggregate1/223.5s
✗Query Builder View1/210.4s
✗View Primary Key1/212.7s