What would it cost us?
Estimate costs using your own workload
Key takeaway
An individual task often costs only a few yen. But the difference grows with volume. Enter your figures in the simple calculator below to estimate your monthly usage cost.
What does one everyday task cost?
These rough estimates use standard-class models (Gemini 3.5 Flash and GPT-5.4). They show that each task is typically on the order of a few yen.
| Example task | Gemini 3.5 Flash | GPT-5.4 |
|---|---|---|
| Draft an email (200 Japanese characters in → 400 out) | Approx. JPY 0.9 | Approx. JPY 1.6 |
| Answer an inquiry (1,500 characters → 500) | Approx. JPY 1.6 | Approx. JPY 2.7 |
| Summarize meeting notes (4,000 characters → 800) | Approx. JPY 3.2 | Approx. JPY 5.3 |
Simple cost calculator
Enter the number of Japanese characters and tasks per month to see an estimated monthly cost immediately.
Illustrative June 2026 rates, not live prices. Uses USD 1 = JPY 160 and 1.5 tokens per Japanese character; this ratio is not an estimate for English text. Actual costs vary by model, usage, caching discounts, and current pricing.
The difference grows with volume
For a typical task (1,500 Japanese characters in → 500 out), monthly costs change as follows with the number of tasks.
| Usage | Gemini 3.5 Flash | GPT-5.4 |
|---|---|---|
| Light (200 tasks/month) | Approx. JPY 324 | Approx. JPY 540 |
| Standard (1,000 tasks/month) | Approx. JPY 1,620 | Approx. JPY 2,700 |
| Heavy (5,000 tasks/month) | Approx. JPY 8,100 | Approx. JPY 13,500 |
Frequently asked questions
How much does one task cost?
Typically a few yen per task: a modest amount for occasional use. Tasks that require longer output, such as extended summaries or long-form writing, cost more.
How should we decide?
The monthly cost difference becomes clearer as task volume grows. Estimate using your own figures and try it on a small scale before deciding.
Based on the official pricing pages of OpenAI and Google AI, as of June 2026. Prices, model names, and specifications can change; check current official information before deciding. Estimates use USD 1 = JPY 160 and approximately 1.5 tokens per Japanese character. They are illustrative Japan-market references, not quotations or estimates for English-language text. This series does not recommend any particular service. Contact sales to confirm current product pricing, delivery, warranty, and support for your country.
Company, product, and service names mentioned are trademarks or registered trademarks of their respective owners.