API cost decision in 10 seconds

Solar Pro 4 vs Qwen3.7 Flash

Pick Solar Pro 4 for lower cost; pick Qwen3.7 Flash only if the larger context window matters more.

Page updated: 2026-08-13T13:07:45Z Data confirmed: 2026-08-23T13:07:49Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Solar Pro 4 for lower cost; pick Qwen3.7 Flash only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Solar Pro 4 is estimated at $0.09 vs $0.1 for Qwen3.7 Flash, saving $0.005 (5.3% lower).

Cost-first pickSolar Pro 4

Context-first pickQwen3.7 Flash

Sample savings$0.0055.3%

10x traffic gap$0.05

Qwen3.7 Flash has more context, but Solar Pro 4 saves $0.005 on the standard workload. At 10x that traffic, the same price gap is about $0.05. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Solar Pro 4 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Solar Pro 4	Qwen3.7 Flash
Input-heavy / RAG	5M input + 500K output	Solar Pro 4	$0.21	$0.21
Balanced workload	1M input + 1M output	Solar Pro 4	$0.15	$0.16
Output-heavy chatbot	1M input + 5M output	Solar Pro 4	$0.63	$0.68

Cheaper input Tie $0.03 vs $0.03 / 1M

Both models report the same input price at $0.03 per 1M tokens.

Cheaper output Solar Pro 4 $0.12 vs $0.13 / 1M

Solar Pro 4 is $0.01 cheaper per 1M output tokens (7.7% lower; 1.08x difference).

Larger context Qwen3.7 Flash 524.29K vs 1M

Qwen3.7 Flash has 475.71K more context (1.91x larger).

Sample workload Solar Pro 4 $0.09 vs $0.1

Solar Pro 4 is $0.005 cheaper on the standard workload (5.3% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Solar Pro 4 Calculating… Estimated API cost

Qwen3.7 Flash 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

both models tie on input price; Solar Pro 4 has the lower output price; Qwen3.7 Flash offers the larger context window. For the 1M input plus 500K output sample, Solar Pro 4 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.09 for Solar Pro 4 and $0.1 for Qwen3.7 Flash.

Best Fit

Choose Solar Pro 4 when you care most about lower output-token price.

Choose Qwen3.7 Flash when you care most about larger context window.

Decision Notes

On the standard 1M input plus 500K output workload, Solar Pro 4 is estimated at $0.09 vs $0.1 for Qwen3.7 Flash, saving $0.005 (5.3% lower).
Solar Pro 4 is $0.005 cheaper on the standard workload (5.3% lower).
Both models report the same input price at $0.03 per 1M tokens.
Solar Pro 4 is $0.01 cheaper per 1M output tokens (7.7% lower; 1.08x difference).
Qwen3.7 Flash has 475.71K more context (1.91x larger).

Head-to-Head Specs

Feature	Solar Pro 4 (Upstage)	Qwen3.7 Flash (Qwen)
Input Price prompt tokens per 1M	$0.03	$0.03
Completion Price per 1M tokens	$0.12	$0.13
Sample Workload Cost 1M input + 500K output	$0.09	$0.1
Context Window	524.29K	1M
Release Date	2026-08-10	2026-07-27

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Solar Pro 4	On the standard 1M input plus 500K output workload, Solar Pro 4 is estimated at $0.09 vs $0.1 for Qwen3.7 Flash, saving $0.005 (5.3% lower).
High-volume input processing	Tie	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Solar Pro 4	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Qwen3.7 Flash	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Qwen3 Next 80B A3B Instruct (free) can replace Qwen3.7 Flash when lower sample workload cost matters most: $0.
Qwen3 Coder 480B A35B (free) can replace Qwen3.7 Flash when lower sample workload cost matters most: $0.

Larger context near this budget

DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.
Ox Alpha offers 1.05M context with $0 sample workload cost.
DeepSeek V4 Flash 0423 offers 1.05M context with $0.1 sample workload cost.

Popular competitors

DeepSeek V4 Flash 0731 · DeepSeek · #1
MiMo-V2.5 · Xiaomi · #2
Hy3 · Tencent · #3
Ox Alpha · stealth · #4

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

Upstage catalog

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

Open Upstage models

Qwen catalog

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

Open Qwen models

Solar Pro 4

Solar Pro 4 is Upstage's cost-efficient large language model, featuring a 524K context window. It is built for long-horizon tasks and agentic workflows, with strong capabilities in office productivity, document-intensive...

Qwen3.7 Flash

Qwen3.7 Flash is a vision-language reasoning model from Alibaba. It is suited for multimodal agents, visual coding, search, and computer interaction, with strengths in object recognition, spatial understanding, and real-world...