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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 5.1

TypeScript · With Guidelines · 2026-09-28
95.3%Task Pass Rate
181/190Checks 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 Check1/19.4s
✓Private Vs Public Table1/116.2s
✓Registered User Gate1/111.5s
✓Admin Bootstrap1/111.6s
✓Role Based Access1/111.8s
✓Ban List1/115.6s
✓Rate Limit1/111.6s
✓Shared Document1/115.8s
✓Secure Projection2/211.6s

basics

100% · 15 evals
PassTaskChecksRun Time
✓Empty Reducers1/114s
✓Basic Tables1/114.1s
✓Scheduled Table1/113.3s
✓Struct In Table1/114.1s
✓Insert2/214.1s
✓Update3/314.1s
✓Delete3/315.2s
✓Crud4/412.2s
✓Index Lookup3/319.9s
✓Init4/414.1s
✓Connect1/115.2s
✓Helper Function3/314.1s
✓Schedule At Time1/113.9s
✓Cancel Schedule1/114.1s
✓Lifecycle Player1/118.3s

data modeling

100% · 6 evals
PassTaskChecksRun Time
✓Event Table1/111.8s
✓Optional Fields1/111.5s
✓Cascade Delete1/115.8s
✓Filter And Aggregate1/117.9s
✓Two Table Join1/114.3s
✓Unique Constraint1/112s

lifecycle

100% · 3 evals
PassTaskChecksRun Time
✓Scheduled Materialization4/423.9s
✓Connection Scoped Presence4/417.9s
✓Scheduled Private3/317.9s

migrations

100% · 3 evals
PassTaskChecksRun Time
✓Automatic Migration3/326.6s
✓Incremental Migration4/427.3s
✓Hot Swap Compatibility2/223.1s

procedures

100% · 8 evals
PassTaskChecksRun Time
✓Procedure Return2/213s
✓Http Fetch2/21m 14s
✓Fetch And Store3/316.6s
✓Scheduled Procedure3/316.3s
✓Http Handler2/21m 12s
✓Http Router2/216s
✓Idempotent Webhook3/321.1s
✓External Upload Flow4/420.9s

queries

88% · 8 evals
PassTaskChecksRun Time
✓View Basic1/114s
✗View Per User0/18s
✓Range Query1/118.4s
✓Sort And Limit1/113.8s
✓Find First1/113.1s
✓Select Distinct1/113.1s
✓Count Without Collect1/118.4s
✓Multi Column Filter1/116s

reducers

100% · 6 evals
PassTaskChecksRun Time
✓Atomic Idempotent Transfer5/511.4s
✓Nested Update3/37s
✓Nested Cascade Delete11/1114.2s
✓Batched Delete4/416.5s
✓Deterministic Context5/58.5s
✓Reducer Result Table2/29.7s

schema

100% · 10 evals
PassTaskChecksRun Time
✓Spacetime Product Type3/322.9s
✓Spacetime Sum Type3/325.8s
✓Elementary Columns3/325.7s
✓Product Type Columns3/322.9s
✓Sum Type Columns3/328.7s
✓Scheduled Columns2/214s
✓Constraints3/313.8s
✓Many To Many5/522.9s
✓Ecs7/716.6s
✓Multi Column Index5/514.3s

tables

100% · 8 evals
PassTaskChecksRun Time
✓Normalized Collection1/114.3s
✓Heartbeat Isolation1/120.6s
✓Binary Storage2/230s
✓Normalized Schema1/120.6s
✓Denormalized Index4/428.7s
✓Autoinc Reference2/228.7s
✓Default Values2/224.4s
✓Special Types1/116.5s

views

43% · 7 evals
PassTaskChecksRun Time
✗Three Table Join0/218.3s
✗Semijoin Intersection1/218.3s
✗Timestamp Window1/214.5s
✗Index And Filter1/212.4s
✗Materialized Aggregate1/224.4s
✗Query Builder View1/215.4s
✗View Primary Key1/218.3s