Pay what you want.
Use what you pay for.
Load any amount from $5 to $5,000. Use it across every model in the catalog at honest list prices. Top up when the balance gets low. That’s the entire pricing model.
Pick a number. We mean it.
These are starting points. The signup form takes any custom amount in the same range.
- $10Kick the tires
- $25A weekend project
- $50A serious prototype
- $100A month of light production
- $250A side product with traffic
- $500An app with real users
Custom amounts up to $5,000. Larger? Email hi@synapse.garden.
Real numbers, not vibes.
Back-of-envelope per dollar, assuming average 1K-token requests. The proxy logs the exact micro-cent every call costs, so the dashboard always shows your actual burn — not an estimate.
- openai/gpt-5.4-nano$0.10 in · $0.40 out~6,000 callsfast + cheap · most chat apps
- openai/gpt-5.4-mini$0.30 in · $1.20 out~2,200 callsbalanced default
- anthropic/claude-sonnet-4-5$3 in · $15 out~150 callsreasoning + long context
- openai/gpt-5.4$5 in · $20 out~90 callsfrontier · heavy reasoning
Every model · prices · capabilities at /models
Buy credit. Use credit. Refill.
- 01
Load any amount.
Pick from the chips above or type a custom dollar figure between $5 and $5,000. Pay through Dodo Payments. The credit lands in your balance instantly.
- 02
Use every model.
Every call deducts micro-cents from your balance at the catalog list price. No bundling, no tiers, no model-of-the-month gating. The dashboard logs every penny.
- 03
Hit zero, stop.
When the balance crosses zero the proxy returns HTTP 402. No surprise invoice — it's mechanically impossible to overspend. Top up to continue, or walk away.
No feature paywalls. Just usage.
Every workspace gets the same surface — per-project keys, audit log, rate limits, cost dashboard, MCP, skills. The only thing that changes between accounts is the balance.
- 100+ models, one API key
- Per-project keys + revoke
- Audit log + CSV export
- RPM / TPM rate limits
- Auto-topup (opt-in)
- Anomaly detection
- MCP server + skills
- Status page · 99.9% target
$1 of trial credit on signup. No card. 3-minute quickstart · pricing math.