# CodeSignal vs Codility: which do AI models recommend for technical hiring assessm, September 2026

HR AI Recommendation Index, September 2026 Edition, Technical hiring assessments. Two of twelve models named CodeSignal first on the direct prompt; one named Codility. Page: https://hr-ai-index.com/talent/technical-hiring-assessments/codesignal-vs-codility/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| CodeSignal | 10% | #4 of 6 | 10% | 41 | 12 of 12 |
| Codility | 5% | #6 of 6 | 32% | 44 | 12 of 12 |

## The direct prompt, model by model

- DeepSeek V4 Flash: codesignal first (first choices: CodeSignal) (alternatives: Codility, HackerRank, TestGorilla)
- MiniMax M2.5: codesignal first (first choices: CodeSignal) (alternatives: Augment Code, HackerRank, TestGorilla)
- Kimi K2: codility first (first choices: Codility) (alternatives: CodeSignal, Coderbyte, HackerRank, TestGorilla)
- GPT-5.4 mini: neither first, one named (first choices: HackerRank) (alternatives: CodeSignal, CoderPad, Codility)
- Gemini 3.5 Flash: neither first, one named (first choices: CoderPad) (alternatives: CodeSignal, HackerEarth, TestGorilla)
- Perplexity Sonar: neither first, one named (first choices: HackerRank) (alternatives: CodeSignal, CoderPad, Coderbyte, Goodfit)
- Grok 4.1 Fast: neither first, one named (first choices: HackerRank) (alternatives: CodeSignal, Coderbyte)
- Llama 4 Maverick: neither first, one named (alternatives: CodeSignal, CoderPad, Coderbyte, Goodfit, HackerRank)
- Qwen 3.7 Flash: neither first, one named (first choices: HackerRank) (alternatives: CodeSignal, TestDome, Vervoe)
- GLM 4.7 FlashX: neither first, one named (first choices: HackerRank) (alternatives: CodeSignal)
- Claude Haiku 4.5: neither named
- Mistral Small: neither named (first choices: HackerRank) (alternatives: Augment Code, Coderbyte)

## What the models said about CodeSignal

- "It punishes deliberate, methodical thinking... a poor score on one application can actively destroy your chances with other companies" (DeepSeek V4 Flash, negative prompt, hard negative)
- "CodeSignal's scoring algorithm incorporates "speed" heavily ... can unfairly penalize candidates who are careful but methodical." (GLM 4.7 FlashX, negative prompt, soft negative)
- "Expensive compared to alternatives ... Assessments have been reported as "flawed" with technical issues" (Kimi K2, negative prompt, soft negative)
- "(or CodeSignal if you like the "certified engineer" benchmark). Both integrate with most ATS platforms" (MiniMax M2.5, paraphrase prompt, first choice)
- "Best for: All-around use, standardized pre-screening at scale, live technical interviews" (DeepSeek V4 Flash, comparative prompt, first choice)
- "Popular ones like CoderPad or CodeSignal have better reps for collaborative/live coding." (Grok 4.1 Fast, negative prompt, first choice)

## What the models said about Codility

- "it is often described as "quite pricey" ... Codility has had issues with "test integrity," where questions and answers are not sufficiently hidden from recruiters" (GLM 4.7 FlashX, negative prompt, hard negative)
- "Opaque scoring: Candidates and reviewers criticize edge-case scoring and lack of transparency" (MiniMax M2.5, negative prompt, hard negative)
- "Why we recommend avoiding HackerRank or Codility (for now)" (Gemini 3.5 Flash, paraphrase prompt, hard negative)
- "Codility offers the best balance of capability, reputation, and price" (Kimi K2, direct prompt, first choice)
- "Often ranked as the best overall, especially for enterprise use." (Mistral Small, comparative prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve 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.