DeepSeek V3.1 is $1.04 cheaper per 1M input tokens (83.2% lower; 5.95x difference).
API cost decision in 10 seconds
Gemini 2.5 Pro vs DeepSeek V3.1
Pick DeepSeek V3.1 for lower cost; pick Gemini 2.5 Pro 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 DeepSeek V3.1 for lower cost; pick Gemini 2.5 Pro only if the larger context window matters more.
On the standard 1M input plus 500K output workload, DeepSeek V3.1 is estimated at $0.6 vs $6.25 for Gemini 2.5 Pro, saving $5.64 (90.3% lower).
Cost-first pickDeepSeek V3.1
Context-first pickGemini 2.5 Pro
Sample savings$5.6490.3%
10x traffic gap$56.45
Gemini 2.5 Pro has more context, but DeepSeek V3.1 saves $5.64 on the standard workload. At 10x that traffic, the same price gap is about $56.45. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
DeepSeek V3.1 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Gemini 2.5 Pro | DeepSeek V3.1 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | DeepSeek V3.1 | $11.25 | $1.45 |
| Balanced workload | 1M input + 1M output | DeepSeek V3.1 | $11.25 | $1 |
| Output-heavy chatbot | 1M input + 5M output | DeepSeek V3.1 | $51.25 | $4.16 |
DeepSeek V3.1 is $9.21 cheaper per 1M output tokens (92.1% lower; 12.7x difference).
Gemini 2.5 Pro has 884.74K more context (6.4x larger).
DeepSeek V3.1 is $5.64 cheaper on the standard workload (90.3% 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
DeepSeek V3.1 has the lower input price; DeepSeek V3.1 has the lower output price; Gemini 2.5 Pro offers the larger context window. For the 1M input plus 500K output sample, DeepSeek V3.1 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $6.25 for Gemini 2.5 Pro and $0.6 for DeepSeek V3.1.
Choose Gemini 2.5 Pro when you care most about larger context window.
Choose DeepSeek V3.1 when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, DeepSeek V3.1 is estimated at $0.6 vs $6.25 for Gemini 2.5 Pro, saving $5.64 (90.3% lower).
- DeepSeek V3.1 is $5.64 cheaper on the standard workload (90.3% lower).
- DeepSeek V3.1 is $1.04 cheaper per 1M input tokens (83.2% lower; 5.95x difference).
- DeepSeek V3.1 is $9.21 cheaper per 1M output tokens (92.1% lower; 12.7x difference).
- Gemini 2.5 Pro has 884.74K more context (6.4x larger).
| Feature | Gemini 2.5 Pro (Google) | DeepSeek V3.1 (DeepSeek) |
|---|---|---|
| Input Price prompt tokens per 1M | $1.25 | $0.21 |
| Completion Price per 1M tokens | $10 | $0.79 |
| Sample Workload Cost 1M input + 500K output | $6.25 | $0.6 |
| Context Window | 1.05M | 163.84K |
| Release Date | ||
| Popularity | #55 | #59 |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | DeepSeek V3.1 | On the standard 1M input plus 500K output workload, DeepSeek V3.1 is estimated at $0.6 vs $6.25 for Gemini 2.5 Pro, saving $5.64 (90.3% lower). |
| High-volume input processing | DeepSeek V3.1 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | DeepSeek V3.1 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Gemini 2.5 Pro | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Gemma 4 31B (free) can replace Gemini 2.5 Pro when lower sample workload cost matters most: $0.
- Gemma 4 26B A4B (free) can replace Gemini 2.5 Pro when lower sample workload cost matters most: $0.
- Lyria 3 Clip Preview can replace Gemini 2.5 Pro when lower sample workload cost matters most: $0.
- Lyria 3 Pro Preview can replace Gemini 2.5 Pro when lower sample workload cost matters most: $0.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
- Owl Alpha offers 1.05M context with $0 sample workload cost.
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- Claude Opus 4.7 · Anthropic · #3
- Claude Sonnet 4.6 · Anthropic · #4
Cheaper alternatives
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Open provider hubsGoogle catalog
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