Solar Pro 4 is $1.97 cheaper per 1M input tokens (98.5% lower; 66.7x difference).
API cost decision in 10 seconds
🔥Claude Sonnet 5 vs Solar Pro 4
Pick Solar Pro 4 for lower cost; pick Claude Sonnet 5 only if the larger context window matters more.
Page updated:
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 Claude Sonnet 5 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 $7 for Claude Sonnet 5, saving $6.91 (98.7% lower).
Cost-first pickSolar Pro 4
Context-first pickClaude Sonnet 5
Sample savings$6.9198.7%
10x traffic gap$69.1
Claude Sonnet 5 has more context, but Solar Pro 4 saves $6.91 on the standard workload. At 10x that traffic, the same price gap is about $69.1. 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 | Claude Sonnet 5 | Solar Pro 4 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Solar Pro 4 | $15 | $0.21 |
| Balanced workload | 1M input + 1M output | Solar Pro 4 | $12 | $0.15 |
| Output-heavy chatbot | 1M input + 5M output | Solar Pro 4 | $52 | $0.63 |
Solar Pro 4 is $9.88 cheaper per 1M output tokens (98.8% lower; 83.3x difference).
Claude Sonnet 5 has 475.71K more context (1.91x larger).
Solar Pro 4 is $6.91 cheaper on the standard workload (98.7% 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; Claude Sonnet 5 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 $7 for Claude Sonnet 5 and $0.09 for Solar Pro 4.
Choose Claude Sonnet 5 when you care most about larger context window.
Choose Solar Pro 4 when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, Solar Pro 4 is estimated at $0.09 vs $7 for Claude Sonnet 5, saving $6.91 (98.7% lower).
- Solar Pro 4 is $6.91 cheaper on the standard workload (98.7% lower).
- Solar Pro 4 is $1.97 cheaper per 1M input tokens (98.5% lower; 66.7x difference).
- Solar Pro 4 is $9.88 cheaper per 1M output tokens (98.8% lower; 83.3x difference).
- Claude Sonnet 5 has 475.71K more context (1.91x larger).
| Feature | 🔥Claude Sonnet 5 (Anthropic) | Solar Pro 4 (Upstage) |
|---|---|---|
| Input Price prompt tokens per 1M | $2 | $0.03 |
| Completion Price per 1M tokens | $10 | $0.12 |
| Sample Workload Cost 1M input + 500K output | $7 | $0.09 |
| Context Window | 1M | 524.29K |
| Release Date | ||
| Popularity | #16 |
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 $7 for Claude Sonnet 5, saving $6.91 (98.7% 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 | Claude Sonnet 5 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Claude 3 Haiku can replace Claude Sonnet 5 when lower sample workload cost matters most: $0.88.
- Claude Haiku 4.5 (batch) can replace Claude Sonnet 5 when lower sample workload cost matters most: $1.75.
- Claude 3.5 Haiku can replace Claude Sonnet 5 when lower sample workload cost matters most: $2.8.
- Claude Sonnet 5 (batch) can replace Claude Sonnet 5 when lower sample workload cost matters most: $3.5.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.17 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.
- DeepSeek V4 Flash 0731 · DeepSeek · #1
- MiMo-V2.5 · Xiaomi · #2
- Hy3 · Tencent · #3
- Ox Alpha · stealth · #4
Cheaper alternatives
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