Solar Pro 4 is $0.11 cheaper per 1M input tokens (78.6% lower; 4.67x difference).
API cost decision in 10 seconds
Solar Pro 4 vs DeepSeek V4 Flash 0731 (batch)
Pick Solar Pro 4 for lower cost; pick DeepSeek V4 Flash 0731 (batch) only if the larger context window matters more.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Solar Pro 4 for lower cost; pick DeepSeek V4 Flash 0731 (batch) only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Solar Pro 4 is estimated at $0.09 vs $0.28 for DeepSeek V4 Flash 0731 (batch), saving $0.19 (67.9% lower).
Cost-first pickSolar Pro 4
Context-first pickDeepSeek V4 Flash 0731 (batch)
Sample savings$0.1967.9%
10x traffic gap$1.9
DeepSeek V4 Flash 0731 (batch) has more context, but Solar Pro 4 saves $0.19 on the standard workload. At 10x that traffic, the same price gap is about $1.9. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Solar Pro 4 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Solar Pro 4 | DeepSeek V4 Flash 0731 (batch) |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Solar Pro 4 | $0.21 | $0.84 |
| Balanced workload | 1M input + 1M output | Solar Pro 4 | $0.15 | $0.42 |
| Output-heavy chatbot | 1M input + 5M output | Solar Pro 4 | $0.63 | $1.54 |
Solar Pro 4 is $0.16 cheaper per 1M output tokens (57.1% lower; 2.33x difference).
DeepSeek V4 Flash 0731 (batch) has 524.29K more context (2x larger).
Solar Pro 4 is $0.19 cheaper on the standard workload (67.9% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Solar Pro 4 has the lower input price; Solar Pro 4 has the lower output price; DeepSeek V4 Flash 0731 (batch) offers the larger context window. For the 1M input plus 500K output sample, Solar Pro 4 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0.09 for Solar Pro 4 and $0.28 for DeepSeek V4 Flash 0731 (batch).
Choose Solar Pro 4 when you care most about lower input-token price, and lower output-token price.
Choose DeepSeek V4 Flash 0731 (batch) when you care most about larger context window.
- On the standard 1M input plus 500K output workload, Solar Pro 4 is estimated at $0.09 vs $0.28 for DeepSeek V4 Flash 0731 (batch), saving $0.19 (67.9% lower).
- Solar Pro 4 is $0.19 cheaper on the standard workload (67.9% lower).
- Solar Pro 4 is $0.11 cheaper per 1M input tokens (78.6% lower; 4.67x difference).
- Solar Pro 4 is $0.16 cheaper per 1M output tokens (57.1% lower; 2.33x difference).
- DeepSeek V4 Flash 0731 (batch) has 524.29K more context (2x larger).
| Feature | Solar Pro 4 (Upstage) | DeepSeek V4 Flash 0731 (batch) (DeepSeek) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.03 | $0.14 |
| Completion Price per 1M tokens | $0.12 | $0.28 |
| Sample Workload Cost 1M input + 500K output | $0.09 | $0.28 |
| Context Window | 524.29K | 1.05M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Solar Pro 4 | On the standard 1M input plus 500K output workload, Solar Pro 4 is estimated at $0.09 vs $0.28 for DeepSeek V4 Flash 0731 (batch), saving $0.19 (67.9% lower). |
| High-volume input processing | Solar Pro 4 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Solar Pro 4 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | DeepSeek V4 Flash 0731 (batch) | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- DeepSeek V4 Flash (free) can replace DeepSeek V4 Flash 0731 (batch) when lower sample workload cost matters most: $0.
- DeepSeek V4 Flash 0731 can replace DeepSeek V4 Flash 0731 (batch) when lower sample workload cost matters most: $0.1.
- DeepSeek V4 Flash 0423 can replace DeepSeek V4 Flash 0731 (batch) when lower sample workload cost matters most: $0.17.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.1 sample workload cost.
- GLM 5.3 Flash offers 1.31M context with $0.2 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.08 sample workload cost.
- Llama 4 Scout offers 1.31M context with $0.28 sample workload cost.
- DeepSeek V4 Flash 0731 · DeepSeek · #1
- MiMo-V2.5 · Xiaomi · #2
- Hy3 · Tencent · #3
- Nemotron 3 Ultra (free) · NVIDIA · #4
Cheaper alternatives
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Open DeepSeek modelsSolar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive...
DeepSeek V4 Flash 0731 is a sparse mixture-of-experts model from DeepSeek, with 13B active parameters out of 284B total. This re-post-trained revision is suited for coding, reasoning, and agent workflows....