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Coding

Debug an error

Find and fix a bug or stack trace in existing code.

Ranked from coding, reasoning, speed scores blended with 90 head-to-head votes cast for this task (45% of the score).

Coding · 55%Reasoning · 35%Speed · 10%

Start with this prompt

Written for this task. Fill in the bracketed parts.

Help me debug this.

What I expected: [expected behaviour]
What happens instead: [actual behaviour]
When it started: [after which change, if known]
What I've already tried: [so we don't go in circles]

Before suggesting a fix, tell me what you think the cause is and why. If you're
uncertain, say so and tell me what would confirm it.

---
[paste the error and the relevant code]
  1. ★
    Claude
    Anthropic
    Strong data18 votes for this task
    6.5
    —
  2. 2
    Gemini
    Google
    Strong data19 votes for this task
    6.0
    —
  3. 3
    ChatGPT
    OpenAI
    Strong data30 votes for this task
    6.0
    —
  4. 4
    Perplexity
    Perplexity AI
    Strong data19 votes for this task
    5.3
    —
  5. 5
    Copilot
    Microsoft
    Strong data20 votes for this task
    5.2
    —
  6. 6
    Grok
    xAI
    Strong data24 votes for this task
    5.1
    —
  7. 7
    Meta AI
    Meta
    Strong data21 votes for this task
    4.6
    —
  8. 8
    DeepSeek
    DeepSeek
    Strong data13 votes for this task
    4.2
    —
  9. 9
    Mistral
    Mistral AI
    Strong data16 votes for this task
    4.0
    —

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