GPTunneL gives you the entire current GPT lineup in one place: the newest GPT-5.6 generation (Sol, Terra, Luna), GPT-5.5 and GPT-5.4, Codex models for coding, and the reasoning o-series. One balance covers every model, you pay only for what you use, and there's no separate subscription to manage.
Open the GPT model chat — every OpenAI model, one balance, no subscriptions.
This article has been updated: it used to cover GPT-4 and GPT-4.5 — OpenAI has since retired those models, so we rewrote it around the current GPT lineup.
Why use GPT models through GPTunneL
A ChatGPT Plus subscription locks you into a fixed monthly fee and one vendor. GPTunneL works with OpenAI models directly through the API: you top up a single balance, pick any model in the catalog, and pay per token. When a new GPT version ships, it shows up in the catalog shortly after release — no plan upgrades required.
Which GPT models are available
The full current lineup, updated soon after each OpenAI release:
- GPT-5.6 Sol — the flagship: a 1M-token context window, reasoning, image understanding, and web search. The strongest GPT for complex work.
- GPT-5.6 Terra — the price-performance pick: the same capabilities and 1M-token context, at a noticeably lower price. A great default.
- GPT-5.6 Luna — fast and light: built for high-volume repetitive requests, drafts, and chatbots where speed and cost matter most.
- GPT-5.5 and GPT-5.5 Pro — the previous flagship and its beefed-up version: 1M-token context and solid reasoning.
- GPT-5.4, Mini, and Nano — the previous generation's workhorses: cheaper than the newest models with a full feature set.
- Codex models (GPT-5.3 Codex, GPT-5.2 Codex, GPT-5.1 Codex) — a dedicated branch for development: repository-scale reading, multi-file edits, debugging, and code review.
- The o-series (o3, o3 Mini, o4 Mini) — reasoning models for math, science, and logic with a 200K-token context.
- The classics: GPT-4o and GPT-4.1 — still in the catalog: GPT-4o is loved for its lively tone, GPT-4.1 for a 1M-token context at a low price.
See the full lineup on the ChatGPT page, and current prices for every model in the price catalog.
How to get started: three steps
Step 1. Sign up
Open GPTunneL in any browser — nothing to install. Signing up takes a couple of minutes with your email, phone, or a social account.
Step 2. Top up your balance
One balance works across every model on the platform — no separate subscription per neural network. You're only charged for actual usage, so an idle account costs nothing.
Step 3. Pick a model and send a prompt
Choose a GPT model from the catalog and write your request in any language. A few tips for better answers:
- Be specific: state the format, style, length, and audience.
- Assign a role: "Imagine you're a financial analyst…"
- Give examples: "Write this in the style of [example]…"
- Break complex tasks into steps: step-by-step instructions work better.
- Check out our prompt engineering guide.
Your chat history is saved in your account, so you can return to any conversation later.
How GPTunneL compares to a ChatGPT Plus subscription
| ChatGPT Plus | GPTunneL | |
|---|---|---|
| Payment | Fixed monthly fee | Pay per token, local payment methods |
| Models | OpenAI only | GPT plus 100+ models from other vendors on one balance |
| Limits | Message caps on flagship models | You pay for actual tokens — no message caps |
| Idle time | The subscription charges even if you never log in | No usage, no spend |
A subscription makes sense if you live in ChatGPT all day. If you use AI periodically — for texts, code, or document analysis — pay-per-use almost always works out cheaper, and the same balance also unlocks Claude, Gemini, and other models.
FAQ
Which GPT models are available in GPTunneL?
The entire current lineup: GPT-5.6 Sol, Terra, and Luna, GPT-5.5 and 5.5 Pro, the GPT-5.4 family, Codex models for coding, the reasoning o-series, and the classic GPT-4o and GPT-4.1. The catalog is updated soon after OpenAI releases.
How is this different from a ChatGPT Plus subscription?
There's no fixed monthly fee: you top up a balance and pay for the tokens you actually process. One balance covers every model on the platform — not just OpenAI.
How much does access cost?
Every model is billed per token — lighter models cost noticeably less than flagships. Current prices for all GPT models are in the price catalog and in the model card next to this article.
Can I use GPT models in my own language?
Yes. GPT models handle dozens of languages for both prompts and answers, and the platform interface is available in multiple languages too.
Try the flagship GPT-5.6 Sol in GPTunneL — open the ChatGPT chat and send your first prompt: one balance, pay per use, no subscriptions.