Head to head

Claude Code vs GitHub Copilot

Comparing 29 documented Claude Code incidents against 5 for GitHub Copilot.
Full Claude Codereport →Full GitHub Copilotreport →

Verdict

Claude Code has the lower average failure severity (7.3/10 vs 8.2/10), making it the statistically safer choice of the two — though both agents have documented critical incidents.

Reliability metrics for Claude Code and GitHub Copilot
MetricClaude CodeGitHub Copilot
Documented incidents295
Average severity7.38.2
Critical93
High111
Verified285

Severity at a glance

Claude Code
7.3high
GitHub Copilot
8.2high

Failure modes

Claude Code
Distribution of failure modes across all documented incidents.
GitHub Copilot
Distribution of failure modes across all documented incidents.

The incidents behind these numbers

Claude Code

10.0Claude Code wiped DataTalks.Club's production infrastructure — 2.5 years of course data — during an AWS migration10.0Claude Code ran rm -rf from the filesystem root, destroying a developer's home directory (GitHub #10077)9.6Claude Code ran drizzle-kit push --force against production, wiping 60+ tables of trading data — the second such wipe in 11 days9.5Claude Code moved files into a log/ subfolder, then rm -rf'd the parent directory containing it — 1,500 files gone (GitHub #49129)9.5Claude Code's parallel-subagent worktree cleanup deleted the main .git directory and entire working tree — irrecoverable repo loss (GitHub #48927)

GitHub Copilot

10.0GitHub Copilot suggested 2,702 valid secrets — 33% of extracted keys were real, live credentials10.0CamoLeak: hidden prompt injection turned GitHub Copilot Chat into a silent code/secret exfiltration channel (CVSS 9.6)10.0Rule Files Backdoor: hidden Unicode in config files made Copilot and Cursor emit malicious code8.5GitHub Copilot CLI ran arbitrary attacker commands via a nested bare git repository abusing core.fsmonitor (CVE-2026-45033)2.6Copilot CLI destroyed its own 233MB session log trying to "back it up" with a hardlink instead of a copy