DeepSeek Pro Latest is $0.75 cheaper per 1M input tokens (74.6% lower; 3.93x difference).
API cost decision in 10 seconds
NewGPT-6.1 Terra Pro vs DeepSeek Pro Latest
Pick GPT-6.1 Terra Pro when budget and context both matter.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick GPT-6.1 Terra Pro when budget and context both matter.
On the standard 1M input plus 500K output workload, GPT-6.1 Terra Pro is estimated at $3.5 vs $4.25 for DeepSeek Pro Latest, saving $0.75 (17.7% lower).
Cost-first pickGPT-6.1 Terra Pro
Context-first pickGPT-6.1 Terra Pro
Sample savings$0.7517.7%
10x traffic gap$7.54
GPT-6.1 Terra Pro is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $7.54. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Cost winner changes by workload shape: input-heavy / RAG favors DeepSeek Pro Latest, balanced workload favors GPT-6.1 Terra Pro, and output-heavy chatbot favors GPT-6.1 Terra Pro.
| Workload shape | Token mix | Better pick | GPT-6.1 Terra Pro | DeepSeek Pro Latest |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | DeepSeek Pro Latest | $7.5 | $5.27 |
| Balanced workload | 1M input + 1M output | GPT-6.1 Terra Pro | $6 | $8.25 |
| Output-heavy chatbot | 1M input + 5M output | GPT-6.1 Terra Pro | $26 | $40.25 |
GPT-6.1 Terra Pro is $3 cheaper per 1M output tokens (37.5% lower; 1.6x difference).
GPT-6.1 Terra Pro has 1.42K more context (1x larger).
GPT-6.1 Terra Pro is $0.75 cheaper on the standard workload (17.7% 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
DeepSeek Pro Latest has the lower input price; GPT-6.1 Terra Pro has the lower output price; GPT-6.1 Terra Pro offers the larger context window. For the 1M input plus 500K output sample, GPT-6.1 Terra Pro is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $3.5 for GPT-6.1 Terra Pro and $4.25 for DeepSeek Pro Latest.
Choose GPT-6.1 Terra Pro when you care most about lower output-token price, and larger context window.
Choose DeepSeek Pro Latest when you care most about lower input-token price.
- On the standard 1M input plus 500K output workload, GPT-6.1 Terra Pro is estimated at $3.5 vs $4.25 for DeepSeek Pro Latest, saving $0.75 (17.7% lower).
- GPT-6.1 Terra Pro is $0.75 cheaper on the standard workload (17.7% lower).
- DeepSeek Pro Latest is $0.75 cheaper per 1M input tokens (74.6% lower; 3.93x difference).
- GPT-6.1 Terra Pro is $3 cheaper per 1M output tokens (37.5% lower; 1.6x difference).
- GPT-6.1 Terra Pro has 1.42K more context (1x larger).
| Feature | NewGPT-6.1 Terra Pro (OpenAI) | DeepSeek Pro Latest (DeepSeek) |
|---|---|---|
| Input Price prompt tokens per 1M | $1 | $0.2542 |
| Completion Price per 1M tokens | $5 | $8 |
| Sample Workload Cost 1M input + 500K output | $3.5 | $4.25 |
| Context Window | 1.05M | 1.05M |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | GPT-6.1 Terra Pro | On the standard 1M input plus 500K output workload, GPT-6.1 Terra Pro is estimated at $3.5 vs $4.25 for DeepSeek Pro Latest, saving $0.75 (17.7% lower). |
| High-volume input processing | DeepSeek Pro Latest | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | GPT-6.1 Terra Pro | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT-6.1 Terra Pro | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace GPT-6.1 Terra Pro when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT-6.1 Terra Pro when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT-6.1 Terra Pro when lower sample workload cost matters most: $0.06.
- gpt-oss-20b (batch) can replace GPT-6.1 Terra Pro when lower sample workload cost matters most: $0.08.
- 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.
- Llama 4 Scout offers 1.31M context with $0.25 sample workload cost.
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Open DeepSeek modelsGPT-6.1 Terra Pro is the same underlying model as [GPT-6.1 Terra](https://openrouter.ai/openai/gpt-6.1-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. **Cost note:** pro mode spends far more...
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