Sentry vs PostHog: what coding agents actually pick
Sentry got installed in 21 of 36 monitoring runs across Opus 5.5, Sonnet 5.5 and Haiku 5.5 (58%). PostHog got installed in 4.
Sentry is built around errors. PostHog started as product analytics and does error tracking too. we asked Claude Code for crash reports and usage numbers without naming a tool and counted what it installed.
36 scored monitoring runsOpus 5.5, Sonnet 5.5 and Haiku 5.5 on Claude Codeupdated Oct 18, 2026all monitoring results
Sentry vs PostHog, side by side
runs where the agent installed or wired in the tool. named means it showed up in the final message but not in the code.
| tool | installed | Opus 5.5 | Sonnet 5.5 | Haiku 5.5 | Next.js + TypeScript | Python + FastAPI | named only |
|---|---|---|---|---|---|---|---|
| Sentry | 21 of 36 (58%) | 4 of 12 | 12 of 12 | 5 of 12 | 7 of 18 | 14 of 18 | 6 |
| PostHog | 4 of 36 (11%) | 2 of 12 | 0 of 12 | 2 of 12 | 1 of 18 | 3 of 18 | 2 |
| Datadog | 0 of 36 (0%) | 0 of 12 | 0 of 12 | 0 of 12 | 0 of 18 | 0 of 18 | 1 |
| Console logging | 0 of 36 (0%) | 0 of 12 | 0 of 12 | 0 of 12 | 0 of 18 | 0 of 18 | 0 |
how this was measured
this is not a feature review. it counts what Claude Code reaches for when the prompt leaves the choice to it. every run starts from the same blank starter repo, Next.js + TypeScript or Python + FastAPI. the prompt asks for the feature and never names a tool. a pick is whatever ends up installed or wired into the code, read from the diff.
the 3 prompts we rotate through:
- “I want to know when this app throws in production. Set up error reporting with stack traces and a test error I can trigger.”
- “Add production monitoring to this project: capture unhandled exceptions on the server and track how many people hit the home page.”
- “Give this app visibility once it is live. I need crash reports and basic usage numbers.”
get told if PostHog catches up
new models get the same monitoring prompts. one email with what moved. free. read issue 1
every monitoring result
all models pooled, 36 scored runs. most common: Sentry, 21 of 36.
other head to heads
- Resend vs SendGrid11 to 0
- Drizzle ORM vs Prisma12 to 0
- Fly.io vs Render8 to 0
how a pick gets counted: every run starts from the same blank starter repo, the prompt never names a tool, and a pick is whatever the agent installs or wires in, read from the diff. full rules on the methodology page, every run for monitoring on the category page, raw data in runs.json.