Estimate Your DeepSeek API Costs Instantly
Free DeepSeek API Pricing Calculator — Slide & Estimate Instantly
Compare DeepSeek V4 Flash, V4 Pro, and competitor model pricing. Adjust input/output token counts and cache hit rate assumptions to see real cost projections.
How to Estimate Monthly Usage
Higher hit rate = lower cost. DeepSeek caches at 12.5% of the original input price for hits.
How to Estimate Monthly Usage
If you do not already have billing exports, start from product traffic: requests per day, average prompt size, average response length, and expected cache reuse.
1. Estimate request volume
Count how many requests your app will send in a normal day, then multiply by 30. Separate peak campaigns from baseline traffic.
2. Estimate prompt and response size
Use a few representative prompts to approximate average input and output tokens. For rough planning, consistency matters more than absolute precision.
3. Add a cache assumption
If your system prompt and context are reused heavily, model a higher hit rate. If every request is unique, start closer to 0% and treat savings as upside.
How the Billing Model Works
Uncached input tokens
These are charged at the model's standard input rate. Large prompts dominate cost when the cache hit rate is low.
Cached input tokens
When the prefix matches a previous request, DeepSeek charges the reduced cache-hit price instead of the full input rate.
Output tokens
Generated tokens are billed separately and can become the main cost driver in agentic or reasoning-heavy workflows.
Competitor Pricing Comparison
Based on published API pricing as of July 2026. Actual costs may vary based on usage patterns and caching efficiency.
| Model | Input / 1M tokens | Output / 1M tokens | Cache Hit / 1M tokens | Notes |
|---|---|---|---|---|
| DeepSeek V4 Flash | ¥1.00 | ¥2.00 | ¥0.02 | — |
| DeepSeek V4 Pro | ¥3.00 | ¥6.00 | ¥0.02 | — |
| GPT-5.5 | ¥34.50 | ¥207.00 | ¥3.45 | — |
| GPT-5.4 | ¥17.25 | ¥103.50 | ¥1.73 | — |
| GPT-5.4 mini | ¥5.18 | ¥31.05 | ¥0.48 | — |
| Claude Fable 5 | ¥69.00 | ¥345.00 | ¥6.90 | — |
| Claude Opus 4.8 | ¥34.50 | ¥172.50 | ¥3.45 | — |
| Claude Sonnet 5 | ¥13.80 | ¥69.00 | ¥1.38 | — |
| Claude Haiku 4.5 | ¥6.90 | ¥34.50 | ¥0.69 | — |
How to Read the Result
Use Flash for high-volume routine work
If the workload is repetitive and latency-sensitive, DeepSeek V4 Flash usually sets the floor for cost planning.
Use Pro when quality offsets the delta
The real question is not whether Pro is more expensive, but whether it cuts retries, human review, or downstream errors enough to justify the gap.
Compare competitors with your actual mix
A model that looks expensive on list price can still make sense for narrow tasks. Re-run the calculator with your own token mix before locking the stack.
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