---
id: coding-agent-error-oct26
slug: coding-agent-error-rate-oct-2026
title: "Error rate by coding agent, October 2026"
topic: reliability
period: Oct 2026
updated: 2026-11-11
license: CC BY 4.0
canonical: https://www.requesty.ai/data/coding-agent-error-rate-oct-2026
---

# Error rate by coding agent, October 2026

> Which coding agents see the fewest API errors? In October 2026 Cursor had the lowest error rate at 1.0% of calls, and Qwen Code the highest at 10.9%.

*Topic: Reliability and ops. Period: Oct 2026. Last updated 2026-11-11.*

## Why it matters

Error rates reflect the models and providers each agent picks as much as the agent itself. Agents that pin a single busy provider see more rate limits.

## Questions this answers

- Which coding agent has the lowest error rate?
- How often do coding agent API calls fail?
- Why does Claude Code see more errors?

## Key findings

1. Cursor: 1.0%.
2. OpenCode: 2.1%.
3. Zoo Code: 2.3%.
4. Claude Code: 8.1%.
5. Qwen Code: 10.9%.

## Data

| Agent | Error rate (percent) |
| --- | --- |
| Cursor | 1.00% |
| OpenCode | 2.14% |
| Zoo Code | 2.30% |
| GitHub Copilot | 2.40% |
| Zed | 2.61% |
| Hermes Agent | 2.81% |
| Roo Code | 2.95% |
| Pi | 3.74% |
| Kilo Code | 5.73% |
| Cline | 6.83% |
| Claude Code | 8.05% |
| Qwen Code | 10.92% |

## Caveats

- Error rate is the share of calls that did not succeed, before any fallback recovery.
- Sample bands show the number of organizations behind each agent.

## Cite as

**APA.** Requesty (2026). Error rate by coding agent, October 2026. Requesty Data. https://www.requesty.ai/data/coding-agent-error-rate-oct-2026

```bibtex
@misc{requesty_coding_agent_error_rate_oct_2026,
  author       = {{Requesty}},
  title        = {Error rate by coding agent, October 2026},
  year         = {2026},
  howpublished = {\url{https://www.requesty.ai/data/coding-agent-error-rate-oct-2026}},
  note         = {Requesty Data}
}
```

---

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