Premium vs Budget Speed
GPT-5.6 Sol vs DeepSeek V4 Flash
GPT-5.6 Sol at $4.00/$20.00 vs DeepSeek V4 Flash at $0.22/$0.66.
Last verified: Jul 13, 2026 · See all 95 models ranked →
| Feature | GPT-5.6 Sol | DeepSeek V4 Flash |
|---|---|---|
| Input price (per 1M tokens) | $5.00 | $0.22 |
| Output price (per 1M tokens) | $30.00 | $0.66 |
| Context window | 1.05M | 1M |
| Standard request cost | $0.019 | $0.000 |
| Output-heavy request cost | $0.13 | $0.001 |
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Openai
GPT-5.6 Sol
$0
estimated monthly cost
Input cost$0
Output cost$0
Per request$0
Deepseek
DeepSeek V4 Flash
$0
estimated monthly cost
Input cost$0
Output cost$0
Per request$0
The Verdict
DeepSeek V4 Flash wins on price and context.
DeepSeek V4 Flash ($0.22/$0.66) is 99% cheaper on output than GPT-5.6 Sol ($4.00/$20.00).
When to Choose GPT-5.6 Sol
- Choose GPT-5.6 Sol when you need the larger context window (1.05M vs 1M) or prefer the openai ecosystem.
- Ecosystem: If you're already using openais API and want to stay in their ecosystem.
When to Choose DeepSeek V4 Flash
- Choose DeepSeek V4 Flash when you want the lower output price ($0.66/1M vs $30.00/1M).
- Ecosystem: If you're already using deepseeks API and want to stay in their ecosystem.
Cost Comparison: Real-World Scenarios
Chatbot (1,000 req/day, 1,500 input, 400 output)
GPT-5.6 Sol$420.00/mo
DeepSeek V4 Flash$9.66/mo
Monthly savings$575.34/mo (98%)
Code Generation (200 req/day, 3,000 input, 1,200 output)
GPT-5.6 Sol$219.40/mo
DeepSeek V4 Flash$4.54/mo
Monthly savings$301.46/mo (99%)
RAG Pipeline (500 queries/day, 5,000 input, 800 output)
GPT-5.6 Sol$525.00/mo
DeepSeek V4 Flash$13.86/mo
Monthly savings$721.14/mo (98%)
Full Comparison Table
| Model | Input/1M | Output/1M | vs GPT-5.6 Sol | Context |
|---|---|---|---|---|
| GPT-5.6 Sol | $4.00 | $20.00 | — | 1.05M |
| DeepSeek V4 Flash | $0.22 | $0.66 | 99% cheaper | 1M |
| GPT-oss 20B | $0.080 | $0.35 | 99% cheaper | 128K |
| Gemini 2.5 Flash-Lite | $0.10 | $0.40 | 99% cheaper | 1M |
| Jamba Mini | $0.20 | $0.40 | 99% cheaper | 256K |
| Llama 4 Scout | $0.18 | $0.59 | 98% cheaper | 1M |
| GPT-oss 120B | $0.15 | $0.60 | 98% cheaper | 128K |
| Claude Fable 5 | $10.00 | $50.00 | 67% more expensive | 1M |
| Claude Mythos 5 | $10.00 | $50.00 | 67% more expensive | 1M |
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