GPT-5 vs DeepSeek V4 Pro: API pricing
OpenAI's GPT-5 against DeepSeek's DeepSeek V4 Pro on price alone — per-token rates, caching, and context window. Run your own workload through both with the calculator below; capability differences are yours to judge on your evals.
| GPT-5 | DeepSeek V4 Pro | |
|---|---|---|
| Input / 1M tokens | $1.25 | $1.32 |
| Cached input / 1M | $0.125 | $0.044 |
| Output / 1M tokens | $10.00 | $3.96 |
| Context window | 272K | 1M |
| Max output | 125K | 384K |
| Vendor | OpenAI | DeepSeek |
Prices last synced Aug 20, 2026 from the LiteLLM community price catalog — the same catalog Marginal prices real usage events against, refreshed daily. Spot an error? Tell us.
Price takeaways
- Input: effectively the same price.
- Output: DeepSeek V4 Pro is 2.5x cheaper.
- Cached input: DeepSeek V4 Pro is 2.8x cheaper.
- Ratios shift with workload shape — output-heavy traffic weights the output rate, cache-friendly traffic weights the cached rate. The calculator below does the arithmetic on your numbers.
Your workload on both
Your monthly workload
Cache hit rate = share of input tokens served from the provider's prompt cache, billed at the model's cached-input price. Estimates use standard per-token rates — batch discounts, service tiers, and long-context surcharges are not applied.
| Model | Input | Cached input | Output | Per request | Monthly |
|---|---|---|---|---|---|
| DeepSeek V4 Procheapest | $792 | $17.60 | $990 | $0.00360 | $1,800 |
| GPT-5 | $750 | $50.00 | $2,500 | $0.00660 | $3,300 |
Related comparisons
Switching models? Watch the bill move in real time.
Marginal prices every call against that day's rates, so an A/B between these two shows up as dollars per customer and feature — not a surprise at month end.