One prompt. Every model.
Choose how far to push it.
Fan out a single question to multiple LLMs simultaneously and compare responses. Your token budget determines how much you can explore each period.
Anonymous. No sign-up.
no account
Free forever with a WP account.
verified email
One purchase. Tokens never expire.
one-time
Fresh tokens every month. Cancel anytime.
/month
| Parameter | 🥤 Red Cup | 🍺 Open Bar | 💵 Cash Bar | 🪙 Run A Tab |
|---|---|---|---|---|
| Identity & Cost | ||||
| Auth requirement | none | WP + email | WP + purchase | WP + subscription |
| Price | free | free | $5 one-time | $3 /month |
| Token Budget | ||||
| Allotment | 1M | 1M | 1M | 1M |
| Period | session | month | until spent | billing cycle |
| Reset cadence | session-scoped | monthly | never expires | billing date |
| Comparison Engine | ||||
| Max lanes | 3 | 3 | 8 | 8 |
| Max output tokens | 512 | 1,024 | 4,096 | 4,096 |
| Premium models | ✗ | ✗ | ✓ | ✓ |
| Custom system prompt | ✗ | ✓ | ✓ | ✓ |
| Share sessions | ✗ | ✓ | ✓ | ✓ |
| Judge LLM | ✓ | ✓ | ✓ | ✓ |
| Rate Limits (per hour) | ||||
| Requests | 20 | 60 | 200 | 200 |
| Comparisons | 5 | 20 | 100 | 100 |
What counts as a token?
Roughly 4 characters or ¾ of a word. Every prompt you send and every response you receive consumes tokens. The judge LLM analysis also draws from your budget. One million tokens is substantial — equivalent to ~750k words processed.
What are "premium models"?
Currently claude-opus-4-6 and gpt-4-turbo — the most capable model from each provider. Unlocked for Cash Bar and Run A Tab. All other models (GPT-4o-mini, Claude Haiku, Gemini, Grok) are available on every tier.
What happens when tokens run out?
New comparisons are blocked until balance is replenished. Free tiers reset on a schedule; Cash Bar tokens never expire — purchase another pack when empty. Run A Tab users get fresh tokens automatically on each billing date.
Can I stack Cash Bar packs with a subscription?
Yes. If you have both run_a_tab and cash_bar balance, subscription tokens are consumed first — your Cash Bar credits are preserved until the subscription lapses. Cash Bar can be purchased multiple times.
How do I cancel a subscription?
Manage billing through the Stripe Customer Portal — accessible from your account settings. Cancel, update payment method, or download invoices there. On cancellation, tier reverts to Open Bar at period end.
Is my data used to train models?
VoxDiff proxies requests to each provider under API terms. Your prompts are subject to each provider's data policy — we do not feed your sessions to any training pipeline of our own. Check OpenAI and Anthropic API policies for provider-level detail.