API cost decision in 10 seconds

NewUnion Alpha vs 🔥DeepSeek V4 Flash 0731

Pick Union Alpha for lower cost; pick DeepSeek V4 Flash 0731 only if the larger context window matters more.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Union Alpha for lower cost; pick DeepSeek V4 Flash 0731 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Union Alpha is estimated at $0 vs $0.12 for DeepSeek V4 Flash 0731, saving $0.12 (100% lower).

Cost-first pickUnion Alpha
Context-first pickDeepSeek V4 Flash 0731
Sample savings$0.12100%
10x traffic gap$1.2

DeepSeek V4 Flash 0731 has more context, but Union Alpha saves $0.12 on the standard workload. At 10x that traffic, the same price gap is about $1.2. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Union Alpha stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickUnion AlphaDeepSeek V4 Flash 0731
Input-heavy / RAG 5M input + 500K output Union Alpha $0 $0.36
Balanced workload 1M input + 1M output Union Alpha $0 $0.18
Output-heavy chatbot 1M input + 5M output Union Alpha $0 $0.66
Cheaper inputUnion Alpha$0 vs $0.06 / 1M
Cheaper outputUnion Alpha$0 vs $0.12 / 1M
Larger contextDeepSeek V4 Flash 0731262.14K vs 1.31M
Sample workloadUnion Alpha$0 vs $0.12

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Union AlphaCalculating…Estimated API cost
DeepSeek V4 Flash 0731Calculating…Estimated API cost
Cheaper for this workloadCalculating…Difference: calculating…

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

Verdict

Union Alpha has the lower input price, Union Alpha has the lower output price, and DeepSeek V4 Flash 0731 offers the larger context window.

For a 1M input token plus 500K output token workload, the estimated API cost is $0 for Union Alpha and $0.12 for DeepSeek V4 Flash 0731.

Best Fit

Choose Union Alpha when you care most about lower input-token price, and lower output-token price.

Choose DeepSeek V4 Flash 0731 when you care most about larger context window.

Head-to-Head Specs
FeatureNewUnion Alpha
(stealth)		🔥DeepSeek V4 Flash 0731
(DeepSeek)
Input Price
prompt tokens per 1M		$0$0.06
Completion Price
per 1M tokens		$0$0.12
Sample Workload Cost
1M input + 500K output		$0$0.12
Context Window262.14K1.31M
Release Date2026-09-162026-07-31
Popularity#6
Union Alpha

Union 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....

DeepSeek V4 Flash 0731

DeepSeek V4 Flash 0731 is a sparse mixture-of-experts model from DeepSeek, with 13B active parameters out of 284B total. This re-post-trained revision is suited for coding, reasoning, and agent workflows....

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionUnion AlphaOn the standard 1M input plus 500K output workload, Union Alpha is estimated at $0 vs $0.12 for DeepSeek V4 Flash 0731, saving $0.12 (100% lower).
High-volume input processingUnion AlphaLower prompt-token price matters most when prompts or retrieved passages dominate the bill.
Long responses and chatbotsUnion AlphaLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workDeepSeek V4 Flash 0731A larger context window leaves more room for retrieved passages and source files.