DeepSeek V4 Pro vs GPT-5.4 mini
Price and specs side by side · USD per 1M tokens · verified 2026-10-23
// side by side
| metric | DeepSeek V4 Pro | GPT-5.4 mini |
|---|
| input / 1M | $1.30 | $0.75 |
| output / 1M | $2.60 | $4.50 |
| blended (3:1) | $1.625 | $1.6875 |
| cache read / 1M | $0.10 | $0.075 |
| context | 1.05M | 400K |
| max output | 16.4K | 128K |
| input types | text | text · image |
| reasoning | yes | yes |
| tool calling | yes | yes |
| structured output | yes | yes |
| open weights | yes | no |
| released | 2026-04-24 | 2026-03-17 |
| knowledge cutoff | 2025-05 | 2025-08-31 |
| lab | DeepSeek | OpenAI |
// monthly cost scenarios
| workload | tokens in / out | DeepSeek V4 Pro | GPT-5.4 mini |
|---|
| Chatbot | 10M / 2M | $18.20 | $16.50 |
| RAG app | 50M / 5M | $78.00 | $60.00 |
| Coding agent | 20M / 10M | $52.00 | $60.00 |
// verdict
- DeepSeek V4 Pro is 3.7% cheaper than GPT-5.4 mini on a blended 3:1 input/output basis.
- DeepSeek V4 Pro has the larger context window (1.05M vs 400K tokens).
- Only GPT-5.4 mini accepts image input.
- Chatbot (10M input / 2M output tokens per month): GPT-5.4 mini costs $16.50 vs $18.20 for DeepSeek V4 Pro, saving $1.70 per month.
- RAG app (50M input / 5M output tokens per month): GPT-5.4 mini costs $60.00 vs $78.00 for DeepSeek V4 Pro, saving $18.00 per month.
- Coding agent (20M input / 10M output tokens per month): DeepSeek V4 Pro costs $52.00 vs $60.00 for GPT-5.4 mini, saving $8.00 per month.
// DeepSeek V4 Pro or GPT-5.4 mini: which one to choose
- Choose DeepSeek V4 Pro for cost-sensitive, high-volume workloads.
- Choose DeepSeek V4 Pro for long documents and large codebases (1.05M-token context).
- Choose GPT-5.4 mini if you need image input.
- Choose DeepSeek V4 Pro if you want open weights you can self-host.