AI model comparison

DeepSeek V4.1 Flash 1017 vs Solar Mini 4

Side by side comparison of DeepSeek V4.1 Flash 1017 and Solar Mini 4 on pricing, benchmark scores, context window, and more.

DeepSeek V4.1 Flash 1017 is the October 17, 2026 snapshot of DeepSeek V4.1 Flash, served by DeepSeek under the `deepseek-flash` API model name.

Input / 1M: $0.15
Output / 1M: $0.60
Context: 1.05M

Solar Mini 4 is Upstage's compact, cost-efficient language model, a 35B-parameter mixture-of-experts with 3B active parameters and a 524K context window.

Input / 1M: $0.05
Output / 1M: $0.20
Context: 524K

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At a glance

Quick verdict

How the two models stack up on the things people ask about most.

Lower price

Solar Mini 4

3x cheaper for a typical chat

Higher intelligence score

Not available

Not enough benchmark data

Larger context window

DeepSeek V4.1 Flash 1017

1.05M vs 524K tokens

Newer release

DeepSeek V4.1 Flash 1017

Released October 17, 2026

Pricing

DeepSeek V4.1 Flash 1017 vs Solar Mini 4 API pricing

Per-token API rates. Cheaper option highlighted.

Metric	DeepSeek V4.1 Flash 1017	Solar Mini 4
Input tokensPer 1M tokens	$0.15	$0.05
Output tokensPer 1M tokens	$0.60	$0.20
Cached input (read)Per 1M tokens	$0.00	$0.01
Cache writePer 1M tokens	Not available	Not available

What it costs in practice

Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.

Chat message

2K in, 500 out

DeepSeek V4.1 Flash 1017$0.60

Solar Mini 4$0.20

Coding task

30K in, 4K out

DeepSeek V4.1 Flash 1017$6.90$2.49 cached

Solar Mini 4$2.30$0.95 cached

Long document summary

150K in, 2K out

DeepSeek V4.1 Flash 1017$23.70$1.65 cached

Solar Mini 4$7.90$1.15 cached

Specs

Context window and capabilities

How much each model can read, how much it can write, and what it accepts as input.

Metric	DeepSeek V4.1 Flash 1017	Solar Mini 4
Context window	1.05M tokens	524K tokens
Max output	393K tokens	131K tokens
Input types	Image, Text	Text
Output types	Text	Text
Reasoning effort levels	Max, High, Low, None	Max, Extra high, High, Medium, Low, Minimal, None
Default reasoning effort	High	Medium
Release date	October 17, 2026	September 23, 2026

Features

Supported features

API features available for each model.

Metric	DeepSeek V4.1 Flash 1017	Solar Mini 4
Tool calling	Supported	Supported
Structured outputs	Supported	Supported
JSON mode	Supported	Supported
Reasoning	Supported	Supported
Temperature	Supported	Supported
Stop sequences	Supported	Not supported
Deterministic seed	Supported	Not supported
Verbosity control	Not supported	Not supported

Our take

Solar Mini 4 is 3x cheaper for a typical chat. DeepSeek V4.1 Flash 1017 has the larger context window (1.05M vs 524K tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.

FAQ

Frequently asked questions

Is DeepSeek V4.1 Flash 1017 or Solar Mini 4 cheaper?

Solar Mini 4 is cheaper for a typical chat (2K input tokens and 500 output tokens). Solar Mini 4 costs $0.05 per 1M input tokens and $0.20 per 1M output tokens, while DeepSeek V4.1 Flash 1017 costs $0.15 per 1M input tokens and $0.60 per 1M output tokens.

Which has a bigger context window, DeepSeek V4.1 Flash 1017 or Solar Mini 4?

DeepSeek V4.1 Flash 1017 supports up to 1.05M tokens of context, compared with 524K for Solar Mini 4.

Can I use DeepSeek V4.1 Flash 1017 and Solar Mini 4 at the same time?

Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see DeepSeek V4.1 Flash 1017 and Solar Mini 4 answer side by side and keep the better response.

Why choose? Ask both.

Send one prompt to DeepSeek V4.1 Flash 1017 and Solar Mini 4 at the same time. Compare the answers side by side and keep the best one.

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