GPT-6.1 Terra (batch) is $0.2 cheaper per 1M input tokens (28.6% lower; 1.4x difference).
API cost decision in 10 seconds
NewGPT-6.1 Terra (batch) vs Aion 3.5 Mini
Pick Aion 3.5 Mini for lower cost; pick GPT-6.1 Terra (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 Aion 3.5 Mini for lower cost; pick GPT-6.1 Terra (batch) only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Aion 3.5 Mini is estimated at $1.4 vs $1.75 for GPT-6.1 Terra (batch), saving $0.35 (20% lower).
Cost-first pickAion 3.5 Mini
Context-first pickGPT-6.1 Terra (batch)
Sample savings$0.3520%
10x traffic gap$3.5
GPT-6.1 Terra (batch) has more context, but Aion 3.5 Mini saves $0.35 on the standard workload. At 10x that traffic, the same price gap is about $3.5. 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 GPT-6.1 Terra (batch), balanced workload favors Aion 3.5 Mini, and output-heavy chatbot favors Aion 3.5 Mini.
| Workload shape | Token mix | Better pick | GPT-6.1 Terra (batch) | Aion 3.5 Mini |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | GPT-6.1 Terra (batch) | $3.75 | $4.2 |
| Balanced workload | 1M input + 1M output | Aion 3.5 Mini | $3 | $2.1 |
| Output-heavy chatbot | 1M input + 5M output | Aion 3.5 Mini | $13 | $7.7 |
Aion 3.5 Mini is $1.1 cheaper per 1M output tokens (44% lower; 1.79x difference).
GPT-6.1 Terra (batch) has 787.86K more context (4.01x larger).
Aion 3.5 Mini is $0.35 cheaper on the standard workload (20% 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
GPT-6.1 Terra (batch) has the lower input price; Aion 3.5 Mini has the lower output price; GPT-6.1 Terra (batch) offers the larger context window. For the 1M input plus 500K output sample, Aion 3.5 Mini is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $1.75 for GPT-6.1 Terra (batch) and $1.4 for Aion 3.5 Mini.
Choose GPT-6.1 Terra (batch) when you care most about lower input-token price, and larger context window.
Choose Aion 3.5 Mini when you care most about lower output-token price.
- On the standard 1M input plus 500K output workload, Aion 3.5 Mini is estimated at $1.4 vs $1.75 for GPT-6.1 Terra (batch), saving $0.35 (20% lower).
- Aion 3.5 Mini is $0.35 cheaper on the standard workload (20% lower).
- GPT-6.1 Terra (batch) is $0.2 cheaper per 1M input tokens (28.6% lower; 1.4x difference).
- Aion 3.5 Mini is $1.1 cheaper per 1M output tokens (44% lower; 1.79x difference).
- GPT-6.1 Terra (batch) has 787.86K more context (4.01x larger).
| Feature | NewGPT-6.1 Terra (batch) (OpenAI) | Aion 3.5 Mini (AionLabs) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.5 | $0.7 |
| Completion Price per 1M tokens | $2.5 | $1.4 |
| Sample Workload Cost 1M input + 500K output | $1.75 | $1.4 |
| Context Window | 1.05M | 262.14K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Aion 3.5 Mini | On the standard 1M input plus 500K output workload, Aion 3.5 Mini is estimated at $1.4 vs $1.75 for GPT-6.1 Terra (batch), saving $0.35 (20% lower). |
| High-volume input processing | GPT-6.1 Terra (batch) | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Aion 3.5 Mini | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | GPT-6.1 Terra (batch) | 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 (batch) when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace GPT-6.1 Terra (batch) when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace GPT-6.1 Terra (batch) when lower sample workload cost matters most: $0.06.
- gpt-oss-20b (batch) can replace GPT-6.1 Terra (batch) when lower sample workload cost matters most: $0.08.
- Llama 4 Scout offers 1.31M context with $0.25 sample workload cost.
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