Access Claude Opus 5, Claude Sonnet 5, and the GPT-5.6 series through one API. Pay per token, top up anytime. No subscriptions, no hidden fees.
All models available through a single OpenAI-compatible endpoint. Prices in USD per million tokens.
| Model | Input | Output | Context | Savings |
|---|---|---|---|---|
| Claude Opus 5 | $0.80 $5 | $4.00 $25 | 200K | 84% off |
| Claude Sonnet 5 | $0.48 $3 | $2.40 $15 | 200K | 84% off |
| Claude Haiku 4.5 | $0.16 $1 | $0.80 $5 | 200K | 84% off |
| Claude Opus 5 Thinking | $0.80 $5 | $4.00 $25 | 200K | 84% off |
| GPT-5.6 Sol | $0.80 | $4.80 | — | High capability |
| GPT-5.6 Terra | $0.48 | $2.88 | — | Balanced |
| GPT-5.6 Luna | $0.24 | $1.44 | — | Lowest cost |
Buy credits and use them across any model. No expiration.
Create an account in 30 seconds. Get $1 free credit to test any model.
Generate an API key from your dashboard. Works with any OpenAI-compatible client.
Point your app to api.kissapi.ai. Access Claude, GPT-5, and more through one endpoint.
We buy capacity in bulk and run it as shared infrastructure across thousands of developers, so the per-token cost lands well below individual list pricing. Billing is metered per token — no seat fees, no monthly minimum, and the balance you top up is what you spend.
No. Your balance never expires. Use it whenever you need, at your own pace.
Yes. Your balance works with every model we support. Switch between Claude, GPT-5, and others freely — billing is per-token based on the model used.
New accounts get $1 in free credits to test any model. After that, top up with any amount starting from $5.
We accept credit cards, debit cards, and other payment methods through our payment processor. All transactions are in USD.
Standard accounts have generous rate limits suitable for most development and production workloads. Contact us if you need higher throughput.
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