Comparison
DeepSeek V4 Flash vs GPT-5.4 mini
GPT-5.4 mini charges 81% more per input token than DeepSeek V4 Flash. On generated (output) tokens, GPT-5.4 mini costs 94% more than DeepSeek V4 Flash. DeepSeek V4 Flash accepts more context per request than GPT-5.4 mini.
| Field | DeepSeek V4 Flash | GPT-5.4 mini |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Context window | 1M | 400K |
| Max output | 384K | 128K |
| Input / 1M | $0.1481% cheaper | $0.75 |
| Output / 1M | $0.2894% cheaper | $4.50 |
| Cached input / 1M | $0.002896% cheaper | $0.075 |
| Batch discount | — | 50% |
| Release date | — | 2026-03-17 |
Worked cost examples
Estimated monthly cost on three common usage shapes
| Workload | DeepSeek V4 Flash | GPT-5.4 mini |
|---|---|---|
Chatbot 800 input / 200 output tokens per request, 100,000 requests/month | $16.80cheaper | $150.00 |
RAG pipeline 6,000 input / 700 output tokens per request, 30,000 requests/month | $31.08cheaper | $229.50 |
Batch summarization 20,000 input / 1,500 output tokens per request, 5,000 requests/month | $16.10cheaper | $108.75 |
DeepSeek V4 Flash vs GPT-5.4 mini FAQ
- Is DeepSeek V4 Flash cheaper than GPT-5.4 mini?
- DeepSeek V4 Flash costs $0.14 per 1M input tokens versus $0.75 for GPT-5.4 mini — DeepSeek V4 Flash is 81% cheaper per input token.
- Which is cheaper for output tokens, DeepSeek V4 Flash or GPT-5.4 mini?
- DeepSeek V4 Flash charges $0.28 per 1M output tokens; GPT-5.4 mini charges $4.50 per 1M output tokens.
- Which has the larger context window, DeepSeek V4 Flash or GPT-5.4 mini?
- DeepSeek V4 Flash does, with a 1,000,000-token context window.
- Do DeepSeek V4 Flash and GPT-5.4 mini offer cache pricing?
- DeepSeek V4 Flash discounts cached input to $0.0028 per 1M tokens. GPT-5.4 mini discounts cached input to $0.075 per 1M tokens.
Looking for another matchup? See all comparisons.