Solar Pro 3 is $0.15 cheaper per 1M input tokens (50% lower; 2x difference).
API cost decision in 10 seconds
🔥Gemini 2.5 Flash vs Solar Pro 3
Pick Solar Pro 3 for lower cost; pick Gemini 2.5 Flash 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 3 for lower cost; pick Gemini 2.5 Flash only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Solar Pro 3 is estimated at $0.45 vs $1.55 for Gemini 2.5 Flash, saving $1.1 (71% lower).
Cost-first pickSolar Pro 3
Context-first pickGemini 2.5 Flash
Sample savings$1.171%
10x traffic gap$11
Gemini 2.5 Flash has more context, but Solar Pro 3 saves $1.1 on the standard workload. At 10x that traffic, the same price gap is about $11. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Solar Pro 3 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Gemini 2.5 Flash | Solar Pro 3 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Solar Pro 3 | $2.75 | $1.05 |
| Balanced workload | 1M input + 1M output | Solar Pro 3 | $2.8 | $0.75 |
| Output-heavy chatbot | 1M input + 5M output | Solar Pro 3 | $12.8 | $3.15 |
Solar Pro 3 is $1.9 cheaper per 1M output tokens (76% lower; 4.17x difference).
Gemini 2.5 Flash has 920.58K more context (8.19x larger).
Solar Pro 3 is $1.1 cheaper on the standard workload (71% 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 3 has the lower input price; Solar Pro 3 has the lower output price; Gemini 2.5 Flash offers the larger context window. For the 1M input plus 500K output sample, Solar Pro 3 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $1.55 for Gemini 2.5 Flash and $0.45 for Solar Pro 3.
Choose Gemini 2.5 Flash when you care most about larger context window.
Choose Solar Pro 3 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 3 is estimated at $0.45 vs $1.55 for Gemini 2.5 Flash, saving $1.1 (71% lower).
- Solar Pro 3 is $1.1 cheaper on the standard workload (71% lower).
- Solar Pro 3 is $0.15 cheaper per 1M input tokens (50% lower; 2x difference).
- Solar Pro 3 is $1.9 cheaper per 1M output tokens (76% lower; 4.17x difference).
- Gemini 2.5 Flash has 920.58K more context (8.19x larger).
| Feature | 🔥Gemini 2.5 Flash (Google) | Solar Pro 3 (Upstage) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.3 | $0.15 |
| Completion Price per 1M tokens | $2.5 | $0.6 |
| Sample Workload Cost 1M input + 500K output | $1.55 | $0.45 |
| Context Window | 1.05M | 128K |
| Release Date | ||
| Popularity | #15 |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Solar Pro 3 | On the standard 1M input plus 500K output workload, Solar Pro 3 is estimated at $0.45 vs $1.55 for Gemini 2.5 Flash, saving $1.1 (71% lower). |
| High-volume input processing | Solar Pro 3 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Solar Pro 3 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Gemini 2.5 Flash | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Gemma 4 26B A4B (free) can replace Gemini 2.5 Flash when lower sample workload cost matters most: $0.
- Gemma 4 31B (free) can replace Gemini 2.5 Flash when lower sample workload cost matters most: $0.
- Lyria 3 Pro Preview can replace Gemini 2.5 Flash when lower sample workload cost matters most: $0.
- Lyria 3 Clip Preview can replace Gemini 2.5 Flash when lower sample workload cost matters most: $0.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Owl Alpha offers 1.05M context with $0 sample workload cost.
- DeepSeek V4 Flash · DeepSeek · #1
- Hy3 preview · Tencent · #2
- Claude Opus 4.7 · Anthropic · #3
- Claude Sonnet 4.6 · Anthropic · #4
Cheaper alternatives
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