DeepSeek V4 Pro vs GPT-5.4 — LLM API Cost Comparison
Compare DeepSeek V4 Pro (DeepSeek) vs GPT-5.4 (OpenAI) on cost per million tokens, context window, and monthly spend.
Prices verified 2026-08-25 · Pricing may change — use the calculator for current estimates
- Input
- $0.58/1M tokens
- Output
- $1.16/1M tokens
- Context
- 1M tokens
- Released
- 2026-03
DeepSeek flagship; 1M context; promo 75% off ($0.435/$0.87) until May 31 2026
- Input
- $2.5/1M tokens
- Output
- $15/1M tokens
- Context
- 1M tokens
- Released
- 2026-03
Strong coding & professional workloads; 272K context standard tier
Monthly Cost by Usage Tier (70% input / 30% output ratio)
| Usage | DeepSeek V4 Pro | GPT-5.4 | Cheaper by |
|---|---|---|---|
| Light (1M tokens) | $0.754 | $6.25 | DeepSeek V4 Pro (88%) |
| Moderate (10M tokens) | $7.54 | $62.50 | DeepSeek V4 Pro (88%) |
| Heavy (100M tokens) | $75.40 | $625 | DeepSeek V4 Pro (88%) |
| Very Heavy (1B tokens) | $754 | $6,250 | DeepSeek V4 Pro (88%) |
Frequently Asked Questions
Which is cheaper — DeepSeek V4 Pro or GPT-5.4?
For input tokens, DeepSeek V4 Pro is cheaper at $0.58/1M tokens — 4.3× less than $2.5/1M. For output tokens, DeepSeek V4 Pro wins at $1.16/1M vs $15/1M. At heavy workloads (100M tokens/month), the cost difference can be significant.
What is the context window difference between DeepSeek V4 Pro and GPT-5.4?
DeepSeek V4 Pro supports 1,048,576 tokens per request; GPT-5.4 supports 1,050,000 tokens. GPT-5.4 wins on context length, making it better for long documents, large codebases, or extended conversations without chunking.
When should I choose DeepSeek V4 Pro over GPT-5.4?
Choose DeepSeek V4 Pro (DeepSeek) if you prefer DeepSeek's ecosystem, tooling, or reliability track record. DeepSeek flagship; 1M context; promo 75% off ($0.435/$0.87) until May 31 2026. Choose GPT-5.4 (OpenAI) if Strong coding & professional workloads; 272K context standard tier. the price/performance fits your workload better. Use this calculator to find the break-even point for your exact token volume.
How much does 1 billion tokens cost on DeepSeek V4 Pro vs GPT-5.4?
At 700M input + 300M output tokens (1B total): DeepSeek V4 Pro costs $754; GPT-5.4 costs $6250. The difference is $5496/billion tokens at this 70/30 input/output ratio.