LLM Reference
HellaSwagactiveReasoning

HellaSwag

Metric: Accuracy (higher is better)Introduced: 2019

About

Commonsense sentence-completion benchmark using adversarially filtered wrong answers. Top LLMs now exceed 95% accuracy.Compare model scores alongside pricing, API availability, and release date — high benchmark score alone doesn't make a model the right pick.

How to read this benchmark

This benchmark uses a scoring system where higher is better. Scores are useful for directional filtering and model shortlisting, not for universal quality ranking.

Interpretation checklist: prefer benchmarks that are closest to your workload style, then validate against the linked model pages for pricing, context window, and provider availability.

Trust when:

  • There is a fresh timestamped snapshot (or multiple snapshots) for this benchmark.
  • Model list covers the same version family you can actually deploy today.
  • Top candidates overlap with your required routing and feature requirements.

Don't trust when:

  • There is only one benchmark snapshot or the dataset appears stale.
  • Benchmark metric direction is opposite of your decision objective.
  • The score difference between options is narrow and likely within implementation variance.

Current modeled score band for tracked entries is roughly 96.4 – 95.6.

Window

Sep 1 to Mar 6

last 3 snapshots

Mean delta

+2.06

score points

Coverage

47

models in latest snapshot

Leaderboard preview (top 5)

  1. 1. GPT-4o (05-13)96.4
  2. 2. Claude 3.5 Sonnet96.2
  3. 3. Llama 3.1 405B95.8
  4. 4. DeepSeek V395.7
  5. 5. Qwen2.5-72B-Instruct95.6