Cheap API for Claude Code: Run Opus & Sonnet for Less

Why route Claude Code through KissAPI

Claude Code can point at any Anthropic-compatible endpoint via environment variables. Route it through KissAPI and the exact same Opus 4.6 / Sonnet 4.6 workflow runs at up to 80% off, with no subscription.

Setup

Set ANTHROPIC_BASE_URL=https://api.kissapi.ai (or the OpenAI base https://api.kissapi.ai/v1 for OpenAI-format tools).
Set your KissAPI key as the API key env var.
Launch Claude Code as usual.
Use claude-sonnet-4-6 as your default and claude-opus-4-6 for the heavy lifts.

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"}]}'

Pricing you'll pay

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.

Power Claude Code for less

Get a KissAPI key, drop it into Claude Code, and start with $1 free credit.

Start Free — $1 credit

FAQ

How do I use Claude in Claude Code cheaply?

Set Claude Code's OpenAI-compatible base URL to https://api.kissapi.ai/v1 and use your KissAPI key. You get the real Claude models at up to 80% off.

Does Claude Code work with KissAPI out of the box?

Yes. Claude Code supports custom OpenAI-compatible endpoints, so no plugin or patch is needed — just the base URL and key.

What will it cost?

Pay-as-you-go per token. Claude Sonnet 4.6 is $0.60/1M input, Opus 4.6 is $3.00/1M input. New accounts get $1 in free credit.

Cheap Claude & GPT-5 API for Claude Code