LMArena status: API, auth, latency & outage reports

LMArena is operational right now. DownForAI checks LMArena every ~75 minutes across 1 monitored surface, with 0 community reports in the last 24 hours.

Operational

Last probe 21 min ago·1 surface

Likely your sideMEDIUM confidence

📚 Docs →

100.0%

24h Uptime

543ms

p50 Latency

1071ms

p95 Latency

Incidents (30d)

Current Status

✅

Operational

Everything works normally

✓Checked by our probes · 596ms

Verified 20m ago

✓No major incident reported

ⓘNo reports in the last 24h

Having issues?

Help other users by reporting if LMArena is not working for you.

0reports in the last 24 hours

Surface Health

Arena WebOperational

HTTP 200p50 543ms20m ago

Uptime — last 24h

100.0%

Latency — last 20 probes

Loading…

Is LMArena down for everyone?

Likely local or client-side issue

Our probes see normal responses. The issue is likely on your end or in your network path.

Moderate confidence

Probe summary (1 surface)

All surfaces operational as of last probe.

Signals detected

All monitored surfaces operational
No recent user reports
Check your network, credentials, or rate limits

Incident history (30d)

✓No incidents recorded in the past 30 days.

Reported symptoms

No user reports for LMArena in the last 24 hours.

Known error signatures

Common failure patterns and how to diagnose them

Provider details

LLM benchmarking platform via crowd-sourced blind comparisons (Elo ranking). Used by researchers and devs to evaluate model quality.

Community channels

✕ @laborai_lmsys

What we monitor

lmarena.ai — Web arena interface

Arena Battle Backend — Model comparison execution

Leaderboard API — Elo ranking data

Operator notes

Traffic spikes massively around major model releases — queue delays during launch events are expected, not outages.

Fallback alternatives

What to use if this service is down

LMArena is degraded

Artificial Analysis or open leaderboard data can provide benchmark comparisons

Easy switch

How we monitor

downforai.com probes each AI service every 2–5 minutes from multiple independent locations. We measure HTTP response codes, latency (p50 & p95), and endpoint availability across the surfaces listed above. Status is classified as Operational, Degraded, or Outage based on a weighted combination of probe results. Uptime is calculated over 30-minute buckets and the last 24 hours. User reports are factored into our diagnosis as a secondary signal. We are independent of all providers listed and receive no compensation to report any particular status.

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