24-hour access · one-time payment

Ultron

24 hours of unlimited access to all 17 models — including Claude Opus 5.5, Claude Opus 5, Claude Fable 5.1, GPT-6.1 Sol and GPT-6 Astra.

$35/ 24 hours

All 17 models · Unlimited tokens

  • All 17 models
  • 16 parallel sessions
  • 24 hours

Secure checkout by Stripe

Base URL
https://api.unlimitedai.sh/v1
Format
OpenAI + Anthropic compatible
Access
24 hours from activation
Parallel sessions
16

Models included (17)

Set up your tools

Replace sk-xx with your API key and MODEL_ID with a model ID from the list above. Commands assume the tool is installed. Run one line.

OpenCode

Uses /v1/chat/completions

UAI_API_KEY='sk-xx' OPENCODE_CONFIG_CONTENT='{"provider":{"uai":{"npm":"@ai-sdk/openai-compatible","name":"unlimitedai.sh","options":{"baseURL":"https://api.unlimitedai.sh/v1","apiKey":"{env:UAI_API_KEY}"},"models":{"MODEL_ID":{}}}}}' opencode -m 'uai/MODEL_ID'

Claude Code

Uses /v1/messages — base URL without /v1, use a Claude model ID

ANTHROPIC_BASE_URL='https://api.unlimitedai.sh' ANTHROPIC_AUTH_TOKEN='sk-xx' CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC=1 claude --model 'MODEL_ID'

Codex

Uses /v1/responses

UAI_API_KEY='sk-xx' codex -m 'MODEL_ID' -c 'model_provider="uai"' -c 'model_providers.uai={name="unlimitedai.sh",base_url="https://api.unlimitedai.sh/v1",env_key="UAI_API_KEY",wire_api="responses"}'

cURL test

Quick check that your key works

curl https://api.unlimitedai.sh/v1/chat/completions -H 'Authorization: Bearer sk-xx' -H 'Content-Type: application/json' -d '{"model":"MODEL_ID","messages":[{"role":"user","content":"hello"}]}'

Setup

We recommend ZCode to configure your API and set up tools such as Claude Code, Codex, and more.

Usage policy

Single-user use only. Using the API as a gateway will result in API key revocation.

Support

We provide model access only; setup and usage training are not included. Please keep your messages brief and to the point.