GPTunneL gives you the whole Claude lineup in one place — from the fast Haiku to the flagship Opus 5. It works out of the box: open the site, sign up with your email and start chatting right in the browser. No subscription, no separate account per service — one balance, local payment methods, pay only for what you use.
In this guide we cover what people usually ask: what Claude can do, which models are available, how much it costs and how to get started.
What is Claude and what can it do
Claude is a family of AI models by Anthropic, one of the main competitors to ChatGPT and Gemini. Claude is the go-to choice when you need a precise answer rather than a flashy one: contracts, technical documentation, software development, analytics.
Understands complex requests and reasons carefully. Claude models dig deep into the context of your question and are less likely to agree with a false premise — they honestly say "I don't know" instead of making things up. Try it yourself: "Explain the difference between correlation and causation, with examples from everyday life and science."
Writes and debugs code. Claude consistently leads SWE-bench — the benchmark built on real software engineering tasks: the model writes and fixes code, explains bugs and suggests architecture. Claude is also the engine behind Claude Code, Anthropic's coding agent for the terminal. Try it yourself: "Build a Telegram bot in Python that keeps a task list, reminds about deadlines and stores data in SQLite. Explain the architecture and command logic."
Handles a huge context. The top models process up to 1 million tokens at once — roughly 500,000 words: an entire codebase, a contract with all its annexes or a stack of reports in a single conversation, no slicing into chunks.
Reads images and files. Every model in the lineup accepts images and documents: attach a contract scan, a screenshot or a spreadsheet — and ask about them in plain text.
Speaks your language. Claude works fluently across many languages: it understands your request and replies with natural, native-sounding text — not machine translation — including long documents and business correspondence.
Which Claude models are available in GPTunneL
GPTunneL offers the full current Anthropic lineup — four tiers for different tasks and budgets:
| Model | Context | Best for |
|---|---|---|
| Claude Opus 5 | 1M tokens | Flagship: complex development, code review, agentic workflows |
| Claude Fable 5 | 1M tokens | Top tier — long autonomous tasks |
| Claude Sonnet 5 | 1M tokens | The universal pick: writing, analytics, everyday coding |
| Claude Sonnet 4.6 | 1M tokens | Previous-generation Sonnet — a proven workhorse |
| Claude Opus 4.8 and 4.7 | 1M tokens | Previous-generation flagships |
| Claude Haiku 4.5 | 200K tokens | The fastest and cheapest — high-volume small requests |
Not sure where to start? Pick Sonnet: it handles most tasks and costs noticeably less than the top models. For complex code and large documents — Opus 5. Switching models takes one click, right in the middle of a conversation. See the full comparison on the Claude lineup page.
How to get started with Claude
Step 1. Open GPTunneL. Signing up with your email takes a minute — no extra setup. The interface runs in the browser on any device.
Step 2. Pick a model and write your prompt. Find the Claude tier you need in the model switcher, attach a file or image if you have one, and describe the task in your own words. The more specific the prompt, the better the answer: "Review the attached contract and list the risks for the contractor" works better than "check this contract".
Step 3. Get your answer and keep the conversation going. Ask follow-up questions, request a rewrite or a deeper dive — the context is preserved until the end of the dialogue, and your chat history stays in your profile.
How much does Claude cost
There is no subscription — that's the key difference from claude.ai, where the Pro plan bills you every month whether you use it or not. In GPTunneL you top up a single balance and pay only for the tokens you actually spend: for your request and for the answer. Didn't use it — didn't pay.
A small top-up is enough to check whether the model fits your task. The current price of the flagship Opus 5 is in the card next to this article, and the full price list for every model is on the pricing page.
One balance works across every model on the platform: Claude today, ChatGPT or image generation tomorrow — without a separate subscription for each service.
How to pay
No workarounds needed: top up your balance with local payment methods, and the money is credited instantly — you can send your first prompt right after the payment. No intermediaries and no extra subscriptions.
Claude Code and the GPTunneL API
Claude Code is Anthropic's terminal-based coding agent: it sees your whole project, edits code across multiple files and runs commands. It needs API access to Claude models.
GPTunneL provides a unified API to the platform's models, including Claude. If you're building your own tools, bots or agents on Claude — get a key in your account dashboard and plug it in. For a deep dive into what Claude Code can do, see our detailed guide.
FAQ
Do I need a subscription to use Claude?
No. GPTunneL has no subscription plans: you top up one balance and pay per use — only for the tokens spent on your requests and answers.
Which Claude model should I choose?
For most tasks — Sonnet 5: fast and noticeably cheaper than the top tiers. For complex code, large documents and agentic workflows — Opus 5 or Fable 5. For a stream of small, repetitive requests — Haiku 4.5.
Is there a free tier?
There is no free tier — you pay for tokens as you use them. But there's no subscription either: top up a small amount and spend it at your own pace.
Does Claude support languages other than English?
Yes, fluently: Claude understands requests and replies naturally in many languages — including long documents, commented code and business correspondence.
Can I send Claude files and images?
Yes. The models in the lineup accept images and documents: scans, screenshots, spreadsheets, PDFs — and analyze them together with your text prompt.
Try Claude in GPTunneL — no subscriptions, pay per use. Signing up takes a minute, and inside you get the entire Anthropic lineup: from the fast Haiku to Opus 5 and Fable 5.