IFEval B
AI benchmark · Instruction Following
- Domains
- Instruction Following
- Tier
- B why
- Snapshot
What is IFEval?
A benchmark of 541 prompts built from 25 verifiable instruction types. It tests whether a model follows checkable constraints such as keyword, length, casing, and response-format requirements.
Tier B
Established: 15 or more models scored, or curated RL directories rate 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.
- 39 models scored
- in curated RL directories (2 pts)
On X · mixed, low buzz, from 2 posts about IFEval in the last month
IFEval comes up rarely, mainly in a talk showing it can be gamed (a Cyrillic character passes checks) and in passing within model release write-ups.
How we got to tier B
- Adoption: 39 models scored. Tier B.
- On X: mixed, low buzz. “IFEval comes up rarely, mainly in a talk showing it can be gamed (a Cyrillic character passes checks) and in passing within model release write-ups.” 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.