Opus without the Opus bill
Claude Opus 4.6 is the model you reach for on hard refactors, long-horizon agents, and research-grade reasoning. The only downside has always been the price. KissAPI relays the genuine Opus 4.6 at $3.00/1M input and $15.00/1M output — the same quality, roughly one-fifth the cost.
Full price table
| Model | Input / 1M | Output / 1M |
|---|---|---|
| Claude Opus 4.6 | $15.00 → $3.00 | $75.00 → $15.00 |
| Claude Sonnet 4.6 | $3.00 → $0.60 | $15.00 → $3.00 |
| Claude Haiku 4.5 | $0.80 → $0.16 | $4.00 → $0.80 |
| GPT-5 | $2.50 → $0.50 | $10.00 → $2.00 |
| GPT-5.5 | $7.50 → $1.50 | $30.00 → $6.00 |
Strikethrough = official list price. Green = KissAPI price. No subscription, pay only for tokens you use.
Connect in one minute
curl https://api.kissapi.ai/v1/chat/completions \
-H "Authorization: Bearer $KISSAPI_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"MODEL_ID","messages":[{"role":"user","content":"hi"}]}'Use model id claude-opus-4-6. Everything else stays OpenAI-compatible.
Run Opus 4.6 for less
Create an account, get $1 free, and call Opus at 80% off.
Start Free — $1 creditFAQ
What does Claude Opus 4.6 cost on KissAPI?
$3.00 per 1M input tokens and $15.00 per 1M output tokens, versus $15.00 / $75.00 on the official API — about 80% off.
Is the quality the same as official Opus?
Yes, it's the genuine Claude Opus 4.6 model with full 200K context and extended thinking.
Can I mix Opus with cheaper models?
Yes. Route hard tasks to Opus 4.6 and everyday work to Sonnet 4.6 or Haiku 4.5 using the same API key.