DeepSeek V4 Pro vs GPT-5.5
DeepSeek V4 Pro is 91% cheaper on input ($0.435 vs $5.00) and 97% cheaper on output ($0.87 vs $30.00). Both offer ~1M token context windows.
Pricing data verified: 2026-06-21
| Specification | DeepSeek V4 Pro (DeepSeek) | GPT-5.5 (OpenAI) |
|---|---|---|
| Input Price (per 1M tokens) | $0.435 | $5.00 |
| Output Price (per 1M tokens) | $0.870 | $30.00 |
| Context Window | 1M | 1.05M |
| Tier | Budget | Premium |
| Provider | DeepSeek | OpenAI |
Calculate Your Exact Costs
See how the costs stack up for your specific usage pattern.
Other Models to Consider
Which Model for Which Use Case?
Cost-Critical Production
DeepSeek V4 Pro saves 96% vs GPT-5.5. At 10,000 requests/day, that's ~$5,740/month saved. For most production workloads, DeepSeek's quality is more than sufficient.
Cutting-Edge Reasoning
GPT-5.5 leads on the most complex reasoning, analysis, and creative tasks. If you need the absolute best quality and cost isn't the primary concern, GPT-5.5 justifies its premium.
Coding & Development
Both handle coding well. DeepSeek V4 Pro is excellent for most coding tasks at 96% lower cost. GPT-5.5 has an edge on complex multi-step refactoring and architecture decisions.
Enterprise with SLAs
OpenAI offers enterprise SLAs, dedicated support, and Azure integration. DeepSeek is more cost-effective but has less enterprise infrastructure. Choose based on your compliance needs.
Need the Full Comparison?
APIpulse Pro lets you compare all 42 models, find the cheapest option for your exact usage, and save scenarios for your team.
Frequently Asked Questions
Is DeepSeek V4 Pro cheaper than GPT-5.5?
Yes, massively. DeepSeek V4 Pro costs $0.435/M input (91% cheaper) and $0.87/M output (97% cheaper). GPT-5.5 output costs 34x more than DeepSeek V4 Pro.
Why would anyone pay for GPT-5.5?
GPT-5.5 offers state-of-the-art reasoning, coding, and creative capabilities. For tasks where quality directly impacts revenue (research, complex analysis, production code), GPT-5.5's superior output quality can be worth the 34x premium.
Can DeepSeek V4 Pro replace GPT-5.5?
For many tasks — classification, extraction, summarization, basic coding — yes, DeepSeek V4 Pro is an excellent replacement at 97% lower cost. For the most demanding tasks, GPT-5.5 still leads on quality.
How much can I save with DeepSeek V4 Pro?
For 1,000 input tokens and 500 output tokens at 1,000 requests/day, DeepSeek V4 Pro costs roughly $26/month vs GPT-5.5's $600/month — saving you about $574/month or 96%.