Unlimited Claude — Opus, Sonnet & Haiku with unlimited tokens

Claude models on every plan

→Claude Haiku 5.5 — anthropic/claude-haiku-5.5
→Claude Sonnet 5 — anthropic/claude-sonnet-5
→Claude Opus 4.8 — anthropic/claude-opus-4.8
→Claude Sonnet 5.5 — anthropic/claude-sonnet-5.5

Extra Claude models on All 17 Models

→Claude Opus 5.5 — anthropic/claude-opus-5.5
→Claude Opus 5 — anthropic/claude-opus-5
→Claude Fable 5.1 — anthropic/claude-fable-5.1

Why developers want unlimited Claude

Long Claude Code sessions, big refactors and 1M-token contexts burn through per-token budgets and weekly limits quickly. A flat 30-day price lets you keep Claude working on a task until it is done.

Use Claude in Claude Code

One-liner

ANTHROPIC_BASE_URL='https://api.unlimitedai.sh' ANTHROPIC_AUTH_TOKEN='sk-xx' claude --model 'anthropic/claude-sonnet-5'

Use Claude in any OpenAI-compatible tool

Settings

Base URL: https://api.unlimitedai.sh/v1
API Key: sk-xx
Model: anthropic/claude-opus-4.8

Good to know

→UnlimitedAI is an independent service and is not affiliated with Anthropic
→Claude Code uses the base URL without /v1; other tools use /v1
→Requests run in parallel up to your plan's session limit: 8 or 16

Questions

Is Claude really unlimited?: Claude tokens are not counted or billed. Your plan sets how many requests run at once: 8 parallel sessions on 12 Models and 16 on All 17 Models.
Which plan do I need for Claude Opus 5.5?: Claude Opus 5.5, Claude Opus 5 and Claude Fable 5.1 are in the All 17 Models plan ($300 for 30 days) and the Ultron pass ($35 for 24 hours). Claude Opus 4.8, Sonnet 5, Sonnet 5.5 and Haiku 5.5 are in both plans.
Does it work with Claude Code?: Yes. Set ANTHROPIC_BASE_URL to https://api.unlimitedai.sh and ANTHROPIC_AUTH_TOKEN to your key, then pick a Claude model ID.

Unlimited Claude tokens. One API key.