Arena.ai (formerly LMArena / Chatbot Arena, lmarena.ai) is a free, anonymous multi-model chat + blind A/B voting service that powers the public LLM/image/code leaderboards. It rotates a large lineup of frontier and open models. This route is an unofficial web-cookie integration (arena-auth cookie, optional Cloudflare clearance/reCAPTCHA tokens); the site also supports anonymous sessions but automated access is rate-limited and subject to bot checks.
Paste the full Cookie header from arena.ai (DevTools → Network → request → Cookie). Include arena-auth-prod-v1.0/.1… and cf_clearance/__cf_bm when present. OmniRoute uses Chrome TLS impersonation; if Arena still 403s, set providerSpecificData.recaptchaV3Token from a live browser session.
Free tier present — value not quantified
This provider offers a free tier, but its terms don’t convert cleanly into a USD figure (e.g. request-count limits or capacity-dependent pools). We refuse to print a misleading zero here. See the note below and the official pricing page for the exact limits.
| Plan | Type | Monthly | Input /1M | Output /1M | Note |
|---|---|---|---|---|---|
| Free | free | — | — | — | Arena is free to use (anonymous or signed-in); usage rate-limited, monetized via leaderboard data/brand sponsorships. No paid tiers. |
Pricing normalized from public sources — always verify with the provider.
// model prices
| Model | Input /1M | Output /1M | Context |
|---|---|---|---|
| gpt-5 | — | — | 400k |
| claude-sonnet-4-6 | — | — | 1M |
| gemini-3.1-pro-preview | — | — | 1.0M |
| Grok 4.3 | — | — | 1M |
$ Does Arena (Free) have a free tier? #
Yes — Arena (Free) offers a free tier. Always confirm current limits on Arena (Free)'s official pricing page — free tiers change without notice.
$ How much does Arena (Free) cost per 1M tokens? #
Arena (Free) does not publish simple per-1M-token pricing (it may bill per request, per output, or via a subscription plan). Check their official pricing page for exact figures.
$ Is Arena (Free) safe to use? #
Uprouter rates Arena (Free) as medium risk. Unofficial cookie-based automation of arena.ai; ToS is aimed at human benchmarking, automated scraping can be blocked (Cloudflare/reCAPTCHA) and may risk the account. Risk ratings are editorial, evidence-based, and never influenced by affiliate relationships.
$ Can I use Arena (Free) through Uprouter Connect? #
Arena (Free) is not marked Connect-compatible in our catalog yet. You can still use their API directly, or request compatibility via /submit.
Raw community sentiment, shown unblended. Votes never feed into objective data fields like price, risk, or status — and never into sort order.
No published reviews yet — be the first.
// more_informationprice history · live status · risk & confidence · code snippets #
price_history
No recorded changes yet.
live_status
current: unknown No probes recorded yet.
Uprouter runs its own probes; best-effort, not a guarantee. Probe results depend on our network location and cadence — for production, always use the provider’s own status page.
risk_&_confidence
Unofficial cookie-based automation of arena.ai; ToS is aimed at human benchmarking, automated scraping can be blocked (Cloudflare/reCAPTCHA) and may risk the account.
Confidence reflects how much verifiable evidence (official docs, probe history, community reports) backs this entry. Risk is our editorial assessment of operator reliability and terms — not financial advice.
code_snippets
curl https://arena.ai/chat/completions \
-H "Authorization: Bearer THEIR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5",
"messages": [{ "role": "user", "content": "Hello" }]
}'
Direct to the provider — Uprouter receives nothing; verify their current pricing before purchasing.
AionLabsfree $0.50 est.pricing n/aconnectLow risk
Pollinationsfree $5.00 est.pricing n/aconnectLow risk
LongCatfree $150.00 est.pricing n/aconnectLow risk
Agnes AIfree $1.00 est.pricing n/aconnectMedium risk
Ranked by neutral similarity signals only — live status, Connect compatibility, free-tier shape and free-credit proximity. Commercial relationships never influence this list.