A function-calling benchmark for tool selection, schema adherence, and argument correctness.
BenchLM mirrors the published score view for BFCL v4. ZAYA1-8B leads the public snapshot at 39.2% , followed by LFM2.5-VL-450M (21.1%). BenchLM does not use these results to rank models overall.
Year
2026
Tasks
Function-calling tasks
Format
Tool invocation and schema evaluation
Difficulty
Advanced tool use
BenchLM stores BFCL v4 as a display-only function-calling reference outside the current weighted core schema.
Version
BFCL v4 2026
Refresh cadence
Quarterly
Staleness state
Current
Question availability
Public benchmark set
BenchLM uses freshness metadata to decide whether a benchmark should still be treated as a strong differentiator, a benchmark to watch, or a display-only reference. For the full scoring policy, see the BenchLM methodology page.
A function-calling benchmark for tool selection, schema adherence, and argument correctness.
ZAYA1-8B by Zyphra currently leads with a score of 39.2% on BFCL v4.
2 AI models have been evaluated on BFCL v4 on BenchLM.
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