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

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

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Coderbyte | 13% | #3 of 6 | 8% | 13 | 11 of 12 |
| Codility | 5% | #6 of 6 | 32% | 44 | 12 of 12 |

## The direct prompt, model by model

- 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)
- 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)
- Mistral Small: neither first, one named (first choices: HackerRank) (alternatives: Augment Code, Coderbyte)
- DeepSeek V4 Flash: neither first, one named (first choices: CodeSignal) (alternatives: Codility, HackerRank, TestGorilla)
- Llama 4 Maverick: neither first, one named (alternatives: CodeSignal, CoderPad, Coderbyte, Goodfit, HackerRank)
- Claude Haiku 4.5: neither named
- Gemini 3.5 Flash: neither named (first choices: CoderPad) (alternatives: CodeSignal, HackerEarth, TestGorilla)
- Qwen 3.7 Flash: neither named (first choices: HackerRank) (alternatives: CodeSignal, TestDome, Vervoe)
- GLM 4.7 FlashX: neither named (first choices: HackerRank) (alternatives: CodeSignal)
- MiniMax M2.5: neither named (first choices: CodeSignal) (alternatives: Augment Code, HackerRank, TestGorilla)

## What the models said about Coderbyte

- "Coderbyte has a mixed reputation. While it is widely used, it suffers from specific reliability and validity issues" (Qwen 3.7 Flash, negative prompt, soft negative)
- "the best fit is usually Coderbyte or TestDome, with Coderbyte having the strongest support in the results as a cost-effective option" (Perplexity Sonar, budget prompt, first choice)
- "Coderbyte stands out as one of the best coding assessment platforms due to its affordable entry-level pricing" (Grok 4.1 Fast, budget prompt, first choice)
- "CoderByte offers all-inclusive pricing and is affordable if you're hiring on a budget" (Claude Haiku 4.5, budget 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.