Claude Fable 5 and Sonnet 5 are live here alongside every Opus, Sonnet and Haiku release — same endpoint, same key, 1M-token window. Swap one environment variable and keep building.
Plans from ₹1,000 ($10 USDT) · key delivered instantly · no Anthropic approval needed
$ export
Works where you already work
01 — The lineup
Claude Fable 5 and Sonnet 5 are the newest additions, both on a 1M-token window. Every model below answers on the same base URL with the same key — switch per request, no redeploy.
Claude Fable 5
claude-fable-5The most capable model in the lineup. Frontier reasoning and long-horizon agentic work.
Claude Opus 5
claude-opus-5The new Opus flagship. Thinks before answering by default, and its knowledge runs to May 2026 — the most recent of any model here.
Claude Sonnet 5
claude-sonnet-5Frontier intelligence at Sonnet speed. The new default for day-to-day building.
Friendly aliases such as Opus 4.8 are accepted and normalised server-side. Appending [1m] to a model name — for example claude-opus-4-8[1m] — selects the 1M-token context tier; the suffix is stripped before the request is forwarded.
02 — What you get
Budgets that hold, streaming that doesn't buffer, and tools that are already switched on. The controls you'd build yourself if you had the week.
Per-key budgets that hold
Give every key its own allowance on a rolling five-hour window. Watch it drain in real time; it resets on its own.
Streaming with nothing in the middle
Server-sent events pass straight through. Tokens reach your client as they are produced — no buffering layer, no re-chunking.
Prompt caching, free
Cache reads never count against your window. Keep a large system prompt hot and pay for it once.
Drop-in SDK compatible
Anthropic request and response shapes, unchanged. The official Python and TypeScript SDKs work as-is.
Tools with nothing to install
Web search and image analysis run server-side and trigger automatically. No MCP config, no client packages, no extra keys.
Usage you can actually read
Live request history, per-model breakdown and window countdown — for every key you issue.
- 0+
- Active developers
- 0K+
- API requests a day
- 0.0%
- Uptime
03 — Migration
No SDK fork, no wrapper library, no rewrite. Repoint the base URL and every request, stream and tool call keeps working exactly as it did.
04 — Getting started
Create an account
Email and a password. No KYC, no documents, no approval queue.
Pay in USDT
Plans from ₹1,000 ($10 USDT) on TRC20 — Binance, WazirX, OKX, Trust Wallet. Your key lands the moment the transfer confirms.
Point your base URL here
One environment variable. Claude Code, Cursor, VS Code and the SDKs pick it up on restart.
Two thousand developers already build on OpusLive. Sign up, pay in USDT, and have a key in your terminal before your coffee lands.