BFCL-V4 A
AI benchmark · Tool Use
What is BFCL-V4?
Berkeley Function Calling Leaderboard V4 (BFCL-V4) evaluates LLMs on their ability to accurately call functions and APIs, including simple, multiple, parallel, and nested function calls across diverse programming scenarios.
Tier A
Widely used: a lab reports it, or 50 or more models are scored on it.
How much stands behind a tier: usage, who backs it, a confirmed line from its own site or paper, and a clear read on X. High with three of the four, medium with two, low otherwise.
- 100 models scored
- in curated RL directories (2 pts)
On X · mixed, moderate buzz, from 14 posts about BFCL-V4 in the last month
BFCL v4 is routinely cited as a standard tool-calling score in model releases, but audits flag reward hacks and contradictory labels in its tasks.
How we got to tier A
- Adoption: 100 models scored. Tier A.
- On X: mixed, moderate buzz. “BFCL v4 is routinely cited as a standard tool-calling score in model releases, but audits flag reward hacks and contradictory labels in its tasks.” No move.
- In curated RL directories: 2 points, a floor of C.
- Not yet confirmed by a line from its own site or paper.
A clear view on X moves a tier one step up or down; most entries don't move. How tiers work.
Not on the map yet: no line from its own site or paper places it in a domain.
Next: browse all benchmarks. Entry from the RL Research daily scrape of public sources, 2026-10-11 snapshot.