Benchmark Almanac

HackerBench

Grok 4.5 7.80% leads since July 2026
Only in system cards

xAI internal CTF-style suite needing chained skills, plus borderline and harmful requests that should be refused.

Made by
xAI (SpaceXAI)
Kind
Refusing harmful requests
Scored
Graded by a model
Answers
Agent task
Tasks
Kept private
Strongest model tested
Grok 4.6 #28 on the capability index
Last in a system card
September 2026
Last model added
September 2026
3
Models scored in lab cards
3
System cards report it, from 1 lab

Grok 4.5 leads with 7.80% among models released by September 2026

Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.

The newest model with a score here came out in September 2026, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:

  1. 7.80 Grok 4.5
  2. 6.90 Grok 4.6
  3. 4.02 Grok 4.7
  1. 1 Grok 4.5 7.80%
  2. 2 Grok 4.6 6.90%
  3. 3 Grok 4.7 4.02%

Source: Labs’ model cards

#ModelScoreSettingDateSource
1 Grok 4.5 7.80% Jul 2026 Lab model card
2 Grok 4.6 6.90% Aug 2026 Lab model card
3 Grok 4.7 4.02% Sep 2026 Lab model card

Number one over time

Lab claims count from the day the card came out, independent runs from the model’s release.

xAI
Lab claims Not tested since Sep 2026
Grok 4.5 7.80%

Source: Labs’ model cards

Scores over time

All the scores we have, one dot each, so a model tested at several settings appears more than once.

Reported by the lab in its model card
0% 20% 40% 60% 80% 100% Near the ceiling (85%) Grok 4.5 0% 20% 40% 60% 80% 100% Near the ceiling (85%) Grok 4.5

Source: Labs’ model cards

Labs report it only in system cards

We read the headline results of 522 launch posts from 52 labs, and none of them list this benchmark. Some system cards do, below.

3 system cards report it, from 1 lab

Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.

DateDocumentScoreAs the document writes itSection
Sep 21, 2026 Grok 4.7 model card 4.02 HackerBench v0.3, harmful/dual-use compliance (lower is better), xhigh, with safeguards (6.3 chart label). Benign refusal = 0.00% Cyber risk
Aug 12, 2026 Grok 4.6 model card 6.9 HackerBench v0.2, harmful/dual-use compliance (lower is better), high, with safeguards (7.4 text). Benign refusal = 0.0% Cyber risk
Jul 14, 2026 Grok 4.5 model card 7.8 HackerBench v0.2, harmful/dual-use compliance (lower is better), high, with safeguards (7.2 chart label). Benign refusal = 0.0% Cyber risk

More in Safety and alignment

All 465 in Safety and alignment
  • FORTRESS In use Paired adversarial and benign national-security misuse prompts. Rubric-graded risk score on adversarial and over-refusal score on benign prompts. Claude Opus 5.5 5.78%
  • StrongREJECT In use Forbidden-prompt jailbreak benchmark with a rubric grader that scores how useful a non-refusal actually is. Inkling 98.6%
  • Gray Swan IPI Arena benchmark In use Indirect prompt-injection attacks from public red-teaming competitions replayed on tool, coding and browser agents. Attack success rate at k attempts. Gemini 4 Carbon 0%
  • DistressBench In use Models reply as a chatbot to 718 simulated users in psychological crisis, in single-turn and multi-turn chats. Three judge models score replies against clinician-written rubrics. Muse Spark 1.2 88.4%
  • Lakera B3 (Backbone Breaker Benchmark) In use Crowdsourced prompt-injection attacks hit backbone LLMs inside agent threat snapshots at three defense levels. The score is attack resistance, 100 minus the board's vulnerability percentage. Claude Opus 4.5 89%
  • IHEval In use Models face conflicts between system, user and tool instructions. Reports a composite score for following the higher-priority instruction. GPT-4o 70%