Affordable LLM Models on GPTProto

Compare text models by output price, starting at $0.14 per 1M output tokens. Sort by estimated monthly cost to see which model fits your budget.

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LLM API Cost Calculator

Enter your monthly token usage to compare what each model would cost. If you only know your per-request usage, multiply the average input and output by the number of requests you expect each month.

01 / 你主要運行什麼?
02 / 你的每月用量有多大?

影片與代理工作負載消耗點數更快——推薦會在你切換情境或使用量等級時自動調整。

$100
圖像生成 · 經常 — 每週 — 圖像模型按輸出計價——每 $100 的點數約可產生 2,400+ 張圖像。
獲得 $104.00 · +4% 回饋額度
2,400+ 圖片
410+ 影片
1650萬–3300萬 token
與官方相比您節省$30.00
與 OpenRouter 相比您節省$37.15

What Is a Cheap LLM API?

A cheap LLM API keeps the cost of your requests low enough to run your workload at scale. Look at input and output prices together, then check whether repeated prompt text qualifies for a lower cache-read rate. Qwen Turbo has the lowest output price in the table. Estimated monthly costs also include input charges. At 10M input and 2M output tokens with no cached input, Qwen Turbo costs about $0.63 per month.

Why Choose GPTProto for a Low-Cost LLM API?

See What You Save on the Same Model

Compare the same model and usage at GPTProto and at the provider’s standard paid rate. If you already know which model works for you, compare the two rates before deciding where to run it.

Use One Key and One Balance

Try a lower-cost model for routine calls and keep a stronger model for work that needs it. Use one GPTProto API key and a shared prepaid balance across supported models. For an existing OpenAI-compatible chat integration, start with the base URL, key, and model ID shown on the model page.

4 Ways to Reduce Your LLM API Costs

1. Use a budget model for repeatable tasks

Try a low-cost model for extraction, routing, or short replies. Send harder cases to a stronger model when your evaluation shows it makes a difference.

2. Send less text per request

Keep the instructions and retrieved context the model needs to answer. Summarize older chat turns where you can and ask for concise output where a short answer works.

3. Measure cache hits on repeated prompts

Reuse stable instructions when the model supports prompt caching. Check your billed cache reads and any write or storage fees before using the cache rate in a budget forecast.

4. Track cost per successful task

Divide the total cost of a test run by the number of tasks that passed your checks. Include retries and any billable reasoning tokens. This gives you a better basis for choosing a model than input price alone.

// FAQ

Frequently Asked Questions

01What is the cheapest LLM API on GPTProto in 2026?+

Qwen Turbo has the lowest standard output price among the text models compared on this page at $0.14 per million output tokens. Doubao Seed 1.6 Flash comes next at $0.1821 per million output tokens.

02How much does one LLM API call cost?+

A call with 1,000 input and 200 output tokens costs about $0.00016 on GPT-6 Luna at the listed GPTProto rates. For a monthly estimate, multiply each per-call token count by the number of calls you expect and enter the totals above.

03Is GPTProto cheaper than buying directly from the model provider?+

It depends on the model and rate. For example, GPT-6 Luna’s standard input and output rates are 20% lower on GPTProto than OpenAI’s standard rates in this comparison. Check the exact model and tier, especially if you already use a provider’s batch or promotional pricing.

04What is the most cost-effective LLM for coding?+

Start with a model that completes your typical edit and passes your tests. Compare the cost of accepted patches across models using the same tasks. Include retries, repository context, and any reasoning tokens in the total.

05Do I need to buy a separate API key for every model?+

You can use one GPTProto API key and one prepaid balance across supported models. Create a key, choose a model, and follow the API example on its model page. Usage is billed at the selected model’s rate.

06Can I estimate costs before topping up?+

Yes. Use the calculator before you add funds. Top-ups start at $15. That amount adds credit to your balance, and usage draws from it at your model’s rate. Unused credit carries forward. View top-up options

07How much can cached input save?+

Savings depend on the model’s cache-read rate and how many input tokens are billed at that rate. Use a measured cache hit rate from a test run to estimate your savings. Include any separate cache-write or storage charges in your budget.

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Make Your First API Call

Pick a model and create your GPTProto API key. Add credit from $15 and run the quickstart on the model page. You can use the same balance to test other supported models. Unused credit stays in your account.