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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 Haiku 5.5

TypeScript · With Guidelines · 2026-11-05
97.6%Task Pass Rate
245/251Checks Passed
96Total Evals

advanced

100% · 12 evals
PassTaskChecksRun Time
✓Atomic Reservation2/29.8s
✓Stable Pagination2/29s
✓Online Backfill2/217.1s
✓Incremental Totals2/29.2s
✓Webhook Ordering2/212.6s
✓Lease Fencing2/210.4s
✓Cancel Reschedule2/225.9s
✓Transactional Quota2/26.7s
✓Scheduled Queue2/212.7s
✓Procedure Cache2/214.7s
✓Permission Revocation2/29.7s
✓Multi Session Presence2/26.9s

auth

100% · 9 evals
PassTaskChecksRun Time
✓Auth Identity Check2/24s
✓Private Vs Public Table2/25.1s
✓Registered User Gate2/23.2s
✓Admin Bootstrap2/25.3s
✓Role Based Access2/24s
✓Ban List2/24.4s
✓Rate Limit2/25.8s
✓Shared Document2/24.6s
✓Secure Projection3/33.4s

basics

100% · 15 evals
PassTaskChecksRun Time
✓Empty Reducers1/12.8s
✓Basic Tables1/12.7s
✓Scheduled Table2/23.3s
✓Struct In Table1/12.4s
✓Insert2/23.1s
✓Update3/33.5s
✓Delete4/43.1s
✓Crud4/44.9s
✓Index Lookup3/33.7s
✓Init4/42.9s
✓Connect2/22.6s
✓Helper Function3/33.1s
✓Schedule At Time2/26.5s
✓Cancel Schedule2/25.4s
✓Lifecycle Player2/22.5s

data modeling

100% · 6 evals
PassTaskChecksRun Time
✓Event Table2/22.9s
✓Optional Fields2/22.9s
✓Cascade Delete2/23.2s
✓Filter And Aggregate2/26.4s
✓Two Table Join2/26.2s
✓Unique Constraint2/22.7s

lifecycle

100% · 3 evals
PassTaskChecksRun Time
✓Scheduled Materialization4/48.8s
✓Connection Scoped Presence5/55.4s
✓Scheduled Private3/37.7s

migrations

100% · 3 evals
PassTaskChecksRun Time
✓Automatic Migration3/35.6s
✓Incremental Migration4/48.2s
✓Hot Swap Compatibility2/25s

procedures

74% · 8 evals
PassTaskChecksRun Time
✓Procedure Return2/22.6s
✓Http Fetch2/24.9s
✗Fetch And Store0/34.8s
✗Scheduled Procedure0/37.5s
✓Http Handler2/22.9s
✓Http Router3/34.4s
✓Idempotent Webhook4/49s
✓External Upload Flow4/47.8s

queries

100% · 8 evals
PassTaskChecksRun Time
✓View Basic2/24.2s
✓View Per User2/22.6s
✓Range Query2/24.9s
✓Sort And Limit2/23.2s
✓Find First2/22.7s
✓Select Distinct2/25.6s
✓Count Without Collect2/25.1s
✓Multi Column Filter2/23.2s

reducers

100% · 7 evals
PassTaskChecksRun Time
✓Atomic Idempotent Transfer6/68.7s
✓Nested Update3/34.9s
✓Nested Cascade Delete11/118.1s
✓Batched Delete5/59.1s
✓Deterministic Context5/52.9s
✓Reducer Result Table2/22.4s
✓Caller Error Message2/22.7s

schema

100% · 10 evals
PassTaskChecksRun Time
✓Spacetime Product Type3/32.7s
✓Spacetime Sum Type3/33.4s
✓Elementary Columns3/33.3s
✓Product Type Columns3/33s
✓Sum Type Columns3/33.6s
✓Scheduled Columns2/22.8s
✓Constraints3/33s
✓Many To Many5/55.4s
✓Ecs7/78.4s
✓Multi Column Index5/53.7s

tables

100% · 8 evals
PassTaskChecksRun Time
✓Normalized Collection1/12.6s
✓Heartbeat Isolation1/13.1s
✓Binary Storage2/25.6s
✓Normalized Schema1/14.2s
✓Denormalized Index4/46.8s
✓Autoinc Reference2/24.9s
✓Default Values2/24.8s
✓Special Types1/15.1s

views

100% · 7 evals
PassTaskChecksRun Time
✓Three Table Join2/27.1s
✓Semijoin Intersection2/25.6s
✓Timestamp Window2/27.7s
✓Index And Filter2/23.3s
✓Materialized Aggregate3/310.8s
✓Query Builder View2/24.2s
✓View Primary Key2/26.3s