# HackerRank vs CodeSignal: which do AI models recommend for candidate assessment, October 2026

HR AI Recommendation Index, October 2026 Edition, Candidate assessment. Zero of fourteen models named HackerRank first on the direct prompt; zero named CodeSignal. Page: https://hr-ai-index.com/talent/candidate-assessment/hackerrank-vs-codesignal/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| HackerRank | 2% | #3 of 12 | 9% | 23 | 10 of 14 |
| CodeSignal | 2% | #5 of 12 | 8% | 13 | 8 of 14 |

## The direct prompt, model by model

- GPT-5.4 mini: neither first, one named (first choices: TestGorilla) (alternatives: Codility, HackerRank, Mercer | Mettl)
- Qwen 3.7 Flash: neither first, one named (first choices: TestGorilla) (alternatives: CodeSignal, HireVue, Humantic AI)
- Claude Haiku 4.5: neither named
- Gemini 3.5 Flash: neither named (first choices: TestGorilla) (alternatives: Criteria Corp, The Predictive Index, Vervoe)
- Perplexity Sonar: neither named (first choices: Criteria Corp) (alternatives: HireVue, TestGorilla, The Predictive Index)
- Grok 4.1 Fast: neither named (first choices: Criteria Corp) (alternatives: HireVue, TestGorilla, The Predictive Index)
- Mistral Small: neither named (first choices: Criteria Corp, Evalart) (alternatives: Adaface)
- DeepSeek V4 Flash: neither named (first choices: Criteria Corp) (alternatives: TestGorilla, eSkill)
- Llama 4 Maverick: neither named
- Kimi K2: neither named (first choices: Criteria Corp) (alternatives: TestGorilla, The Predictive Index, Vervoe, Wonderlic)
- GLM 4.7 FlashX: neither named (first choices: TestGorilla) (alternatives: Testlify, Vervoe)
- MiniMax M2.5: neither named (first choices: Evalart, Toggl Hire)
- GPT-6 Luna: neither named (first choices: Criteria Corp) (alternatives: TestGorilla)
- Muse Glimmer 30B: neither named (first choices: Criteria Corp) (alternatives: Evalart)

## What the models said about CodeSignal

- "The best skills testing tool for hiring for a mid-sized B2B company would be CodeSignal, TestGorilla, or Criteria Corp." (Llama 4 Maverick, paraphrase prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.