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LLM Benchmarks

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

Anthropic: Claude Fable 5.1

C# · With Guidelines · 2026-09-02

98.9%Task Pass Rate

88/89Checks Passed

47Total Evals

88% · 8 evals

Pass	Task	Checks	Run Time
✓	Auth Identity Check	1/1	12.7s
✓	Private Vs Public Table	1/1	12.3s
✓	Registered User Gate	1/1	14.5s
✓	Admin Bootstrap	1/1	15.6s
✓	Role Based Access	1/1	16.4s
✓	Ban List	1/1	16.1s
✗	Rate Limit	0/1	9.8s
✓	Shared Document	1/1	16.6s

100% · 15 evals

Pass	Task	Checks	Run Time
✓	Empty Reducers	1/1	13.1s
✓	Basic Tables	1/1	12.2s
✓	Scheduled Table	1/1	13.3s
✓	Struct In Table	1/1	11.3s
✓	Insert	2/2	11.6s
✓	Update	3/3	13.5s
✓	Delete	3/3	13.6s
✓	Crud	4/4	12.6s
✓	Index Lookup	3/3	12.9s
✓	Init	4/4	12.0s
✓	Connect	1/1	12.7s
✓	Helper Function	3/3	12.2s
✓	Schedule At Time	1/1	13.9s
✓	Cancel Schedule	1/1	14.1s
✓	Lifecycle Player	1/1	12.4s

100% · 6 evals

Pass	Task	Checks	Run Time
✓	Event Table	1/1	13.5s
✓	Optional Fields	1/1	12.9s
✓	Cascade Delete	1/1	14.6s
✓	Filter And Aggregate	1/1	15.7s
✓	Wo Table Join	1/1	15.4s
✓	Unique Constraint	1/1	12.4s

100% · 8 evals

Pass	Task	Checks	Run Time
✓	View Basic	1/1	12.3s
✓	View Per User	1/1	12.7s
✓	Range Query	1/1	14.8s
✓	Sort And Limit	1/1	14.4s
✓	Find First	1/1	12.8s
✓	Select Distinct	1/1	13.7s
✓	Count Without Collect	1/1	13.2s
✓	Multi Column Filter	1/1	11.8s

100% · 10 evals

Pass	Task	Checks	Run Time
✓	Spacetime Product Type	3/3	13.3s
✓	Spacetime Sum Type	3/3	13.4s
✓	Elementary Columns	3/3	14.2s
✓	Product Type Columns	3/3	13.0s
✓	Sum Type Columns	3/3	14.7s
✓	Scheduled Columns	2/2	13.6s
✓	Constraints	3/3	13.1s
✓	Many To Many	5/5	15.5s
✓	Ecs	7/7	17.6s
✓	Multi Column Index	5/5	14.5s