Union Alpha is free for input tokens while Nemotron 3.5 Content Safety costs $0.2 per 1M tokens.
API cost decision in 10 seconds
NewUnion Alpha vs Nemotron 3.5 Content Safety
Pick Union Alpha when budget and context both matter.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Union Alpha when budget and context both matter.
On the standard 1M input plus 500K output workload, Union Alpha is estimated at $0 vs $0.3 for Nemotron 3.5 Content Safety, saving $0.3 (100% lower).
Cost-first pickUnion Alpha
Context-first pickUnion Alpha
Sample savings$0.3100%
10x traffic gap$3
Union Alpha is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $3. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Union Alpha stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Union Alpha | Nemotron 3.5 Content Safety |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Union Alpha | $0 | $1.1 |
| Balanced workload | 1M input + 1M output | Union Alpha | $0 | $0.4 |
| Output-heavy chatbot | 1M input + 5M output | Union Alpha | $0 | $1.2 |
Union Alpha is free for output tokens while Nemotron 3.5 Content Safety costs $0.2 per 1M tokens.
Union Alpha has 131.07K more context (2x larger).
Union Alpha is free for the standard workload while the other model is estimated at $0.3.
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
Union Alpha has the lower input price; Union Alpha has the lower output price; Union Alpha offers the larger context window. For the 1M input plus 500K output sample, Union Alpha is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0 for Union Alpha and $0.3 for Nemotron 3.5 Content Safety.
Choose Union Alpha when you care most about lower input-token price, lower output-token price, and larger context window.
Choose Nemotron 3.5 Content Safety when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
- On the standard 1M input plus 500K output workload, Union Alpha is estimated at $0 vs $0.3 for Nemotron 3.5 Content Safety, saving $0.3 (100% lower).
- Union Alpha is free for the standard workload while the other model is estimated at $0.3.
- Union Alpha is free for input tokens while Nemotron 3.5 Content Safety costs $0.2 per 1M tokens.
- Union Alpha is free for output tokens while Nemotron 3.5 Content Safety costs $0.2 per 1M tokens.
- Union Alpha has 131.07K more context (2x larger).
| Feature | NewUnion Alpha (stealth) | Nemotron 3.5 Content Safety (NVIDIA) |
|---|---|---|
| Input Price prompt tokens per 1M | $0 | $0.2 |
| Completion Price per 1M tokens | $0 | $0.2 |
| Sample Workload Cost 1M input + 500K output | $0 | $0.3 |
| Context Window | 262.14K | 131.07K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Union Alpha | On the standard 1M input plus 500K output workload, Union Alpha is estimated at $0 vs $0.3 for Nemotron 3.5 Content Safety, saving $0.3 (100% lower). |
| High-volume input processing | Union Alpha | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Union Alpha | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Union Alpha | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Nemotron 3 Ultra (free) can replace Nemotron 3.5 Content Safety when lower sample workload cost matters most: $0.
- Nemotron 3.5 Lightning (free) can replace Nemotron 3.5 Content Safety when lower sample workload cost matters most: $0.
- Nemotron 3.5 Content Safety (free) can replace Nemotron 3.5 Content Safety when lower sample workload cost matters most: $0.
- Nemotron 3 Nano Omni (free) can replace Nemotron 3.5 Content Safety when lower sample workload cost matters most: $0.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.12 sample workload cost.
- GLM 5.3 Flash offers 1.31M context with $0.24 sample workload cost.
- GLM Flash Latest offers 1.31M context with $0.2 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.09 sample workload cost.
- Qwen3.8 Max (0902) · Qwen · #1
- GPT-5.6 Luna · OpenAI · #2
- Hy4 preview · Tencent · #3
- DeepSeek V4 Flash 0731 · DeepSeek · #4
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
Find models with larger context windows for RAG, long documents, and codebase review.
Open largest context modelsProvider catalogs
Compare models within provider hubs before choosing a final API vendor.
Open provider hubsstealth catalog
Review all tracked stealth models before deciding whether this matchup is the right shortlist.
Open stealth modelsNVIDIA catalog
Check other NVIDIA models with comparable pricing, context, or release timing.
Open NVIDIA modelsUnion Alpha is a multimodal model built for research, coding, and agentic workflows, while delivering frontier-level performance across a broad range of general-purpose tasks. Union Alpha is a stealth model....
NVIDIA Nemotron 3.5 Content Safety is a compact 4B-parameter multimodal guardrail model from NVIDIA, fine-tuned from Google Gemma-3-4B. It moderates both inputs to and responses from LLMs and VLMs, accepting...