API cost decision in 10 seconds

NewMistral Large 4 vs Union Alpha

Pick Union Alpha for lower cost; pick Mistral Large 4 only if the larger context window matters more.

Page updated:  Data confirmed:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Union Alpha for lower cost; pick Mistral Large 4 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Union Alpha is estimated at $0 vs $1.73 for Mistral Large 4, saving $1.73 (100% lower).

Cost-first pickUnion Alpha
Context-first pickMistral Large 4
Sample savings$1.73100%
10x traffic gap$17.25

Mistral Large 4 has more context, but Union Alpha saves $1.73 on the standard workload. At 10x that traffic, the same price gap is about $17.25. 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 pickMistral Large 4Union Alpha
Input-heavy / RAG5M input + 500K outputUnion Alpha$4.45$0
Balanced workload1M input + 1M outputUnion Alpha$2.77$0
Output-heavy chatbot1M input + 5M outputUnion Alpha$11.13$0
Cheaper input Union Alpha $0.68 vs $0 / 1M

Union Alpha is free for input tokens while Mistral Large 4 costs $0.68 per 1M tokens.

Cheaper output Union Alpha $2.09 vs $0 / 1M

Union Alpha is free for output tokens while Mistral Large 4 costs $2.09 per 1M tokens.

Larger context Mistral Large 4 1.05M vs 262.14K

Mistral Large 4 has 786.43K more context (4x larger).

Sample workload Union Alpha $1.73 vs $0

Union Alpha is free for the standard workload while the other model is estimated at $1.73.

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Mistral Large 4 Calculating… Estimated API cost
Union Alpha Calculating… Estimated API cost
Cheaper for this workload Calculating… 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; Mistral Large 4 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 $1.73 for Mistral Large 4 and $0 for Union Alpha.

Best Fit

Choose Mistral Large 4 when you care most about larger context window.

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

Decision Notes
  • On the standard 1M input plus 500K output workload, Union Alpha is estimated at $0 vs $1.73 for Mistral Large 4, saving $1.73 (100% lower).
  • Union Alpha is free for the standard workload while the other model is estimated at $1.73.
  • Union Alpha is free for input tokens while Mistral Large 4 costs $0.68 per 1M tokens.
  • Union Alpha is free for output tokens while Mistral Large 4 costs $2.09 per 1M tokens.
  • Mistral Large 4 has 786.43K more context (4x larger).
Head-to-Head Specs
FeatureNewMistral Large 4
(Mistral)		Union Alpha
(stealth)
Input Price
prompt tokens per 1M		$0.68$0
Completion Price
per 1M tokens		$2.09$0
Sample Workload Cost
1M input + 500K output		$1.73$0
Context Window1.05M262.14K
Release Date

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 $1.73 for Mistral Large 4, saving $1.73 (100% lower).
High-volume input processingUnion AlphaLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsUnion AlphaLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workMistral Large 4A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps
  • Mistral Nemo can replace Mistral Large 4 when lower sample workload cost matters most: $0.04.
  • Mistral Small 3 can replace Mistral Large 4 when lower sample workload cost matters most: $0.09.
  • Ministral 3 8B 2512 (batch) can replace Mistral Large 4 when lower sample workload cost matters most: $0.11.
  • Ministral 3 3B 2512 can replace Mistral Large 4 when lower sample workload cost matters most: $0.15.
Larger context near this budget
  • Llama 4 Scout offers 1.31M context with $0.47 sample workload cost.
  • MiMo-V2.6-Flash offers 1.05M context with $0.28 sample workload cost.
  • GPT-6 Luna offers 1.05M context with $0.35 sample workload cost.
  • GPT-6 Luna Pro offers 1.05M context with $0.35 sample workload cost.

Cheaper alternatives

Review low-cost models sorted by a standard 1M input plus 500K output workload.

Open cheapest models

Larger context alternatives

Find models with larger context windows for RAG, long documents, and codebase review.

Open largest context models

Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

Open provider hubs

Mistral catalog

Review all tracked Mistral models before deciding whether this matchup is the right shortlist.

Open Mistral models

stealth catalog

Check other stealth models with comparable pricing, context, or release timing.

Open stealth models
Mistral Large 4

Mistral Large 4 is a frontier multimodal (text and image input) model from Mistral AI built for reasoning, coding, and agentic workloads. It offers a 1M-token context window with up...

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....