{
  "@context": "https://schema.org",
  "@type": "Dataset",
  "@id": "https://requesty.ai/data/coding-agent-error-rate-apr-2026",
  "id": "coding-agent-error-apr26",
  "slug": "coding-agent-error-rate-apr-2026",
  "title": "Error rate by coding agent, April 2026",
  "shortTitle": "Agent error rate",
  "topic": "reliability",
  "abstract": "How reliable are AI coding agents? In April 2026, Roo Code leads with a 2.5% error rate across 147K calls. Claude Code sits at 7.0% across 494K calls. Forge trails at 11.2% across 1.1K calls. Kilo Code shows 10.0% error rate across 23K calls.",
  "whyItMatters": "Error rates directly impact developer productivity. Roo Code's 2.5% error rate means fewer than 1 in 40 calls fails. The spread across agents points to structural differences in how agents construct and retry API requests.",
  "questions": [
    "Which coding agent has the lowest error rate?",
    "How reliable is Claude Code compared to other coding agents?",
    "What is the typical error rate for AI coding tools?"
  ],
  "period": "Apr 2026",
  "updated": "2026-05-16",
  "license": "CC BY 4.0",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
  "caveats": [
    "Error rate includes all non-200 HTTP status codes. Some \"errors\" may be expected behavior (e.g. rate limiting that triggers a retry).",
    "Agents with very low traffic (Cursor, GitHub Copilot, Codex CLI) are excluded due to insufficient sample size.",
    "Error rate does not distinguish between client-side errors (4xx) and server-side errors (5xx)."
  ],
  "keyFindings": [
    "Roo Code: 2.5% error rate. The most reliable coding agent by a significant margin.",
    "OpenCode: 3.1% error rate. Strong reliability despite rapid growth.",
    "Claude Code: 7.0% error rate. Acceptable but higher than Roo Code, possibly due to more aggressive retry patterns.",
    "Kilo Code: 10.0% error rate.",
    "Forge: 11.2% error rate. The highest among agents with sufficient sample size."
  ],
  "columns": [
    {
      "key": "agent",
      "label": "Agent",
      "unit": "count"
    },
    {
      "key": "error_rate",
      "label": "Error rate",
      "unit": "percent"
    }
  ],
  "rows": [
    {
      "agent": "Aider",
      "error_rate": 0.009
    },
    {
      "agent": "Roo Code",
      "error_rate": 0.025
    },
    {
      "agent": "OpenCode",
      "error_rate": 0.031
    },
    {
      "agent": "Zed",
      "error_rate": 0.037
    },
    {
      "agent": "Cline",
      "error_rate": 0.049
    },
    {
      "agent": "Claude Code",
      "error_rate": 0.07
    },
    {
      "agent": "Kilo Code",
      "error_rate": 0.1
    },
    {
      "agent": "Forge",
      "error_rate": 0.112
    }
  ],
  "rowKey": "agent",
  "citation": {
    "apa": "Requesty (2026). Error rate by coding agent, April 2026. Requesty Data. https://requesty.ai/data/coding-agent-error-rate-apr-2026",
    "bibtex": "@misc{requesty_coding_agent_error_rate_apr_2026,\n  author       = {{Requesty}},\n  title        = {Error rate by coding agent, April 2026},\n  year         = {2026},\n  howpublished = {\\url{https://requesty.ai/data/coding-agent-error-rate-apr-2026}},\n  note         = {Requesty Data}\n}"
  },
  "permalink": "https://requesty.ai/data/coding-agent-error-rate-apr-2026",
  "downloads": {
    "json": "https://requesty.ai/data/coding-agent-error-rate-apr-2026/data.json",
    "csv": "https://requesty.ai/data/coding-agent-error-rate-apr-2026/data.csv",
    "markdown": "https://requesty.ai/data/coding-agent-error-rate-apr-2026.md"
  },
  "citedIn": [],
  "image": "https://requesty.ai/data/coding-agent-error-rate-apr-2026/opengraph-image",
  "source": {
    "organization": "Requesty",
    "url": "https://requesty.ai"
  }
}