AI model comparison

Solar Mini 4 vs MiMo-V2.5-Pro

Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.

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

MiMo-V2.5-Pro is Xiaomi’s flagship model, delivering strong performance in general agentic capabilities, complex software engineering, and long-horizon tasks, with top rankings on benchmarks such as ClawEval, GDPVal, and SWE-bench Pro.

Input / 1M
$0.44
Output / 1M
$0.87
Context
1.05M

At a glance

Quick verdict

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

Lower price

upstage logo

Solar Mini 4

6.5x cheaper for a typical chat

Higher intelligence score

xiaomi logo

MiMo-V2.5-Pro

26 vs 24.1 on Artificial Analysis

Larger context window

xiaomi logo

MiMo-V2.5-Pro

1.05M vs 524K tokens

Newer release

upstage logo

Solar Mini 4

Released September 23, 2026

Benchmarks

Benchmark scores

Independent scores from Artificial Analysis. Higher is better.

Intelligence index

upstage logoSolar Mini 424.1
xiaomi logoMiMo-V2.5-Pro26

Coding index

upstage logoSolar Mini 4Not available
xiaomi logoMiMo-V2.5-Pro60.2

Agentic index

upstage logoSolar Mini 4Not available
xiaomi logoMiMo-V2.5-Pro21.3

Pricing

Solar Mini 4 vs MiMo-V2.5-Pro API pricing

Per-token API rates. Cheaper option highlighted.

Metricupstage logoSolar Mini 4xiaomi logoMiMo-V2.5-Pro
Input tokensPer 1M tokens$0.05$0.44
Output tokensPer 1M tokens$0.20$0.87
Cached input (read)Per 1M tokens$0.01$0.00
Cache writePer 1M tokensNot availableNot 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

upstage logoSolar Mini 4$0.20
xiaomi logoMiMo-V2.5-Pro$1.31

Coding task

30K in, 4K out

upstage logoSolar Mini 4$2.30$0.95 cached
xiaomi logoMiMo-V2.5-Pro$16.53$3.59 cached

Long document summary

150K in, 2K out

upstage logoSolar Mini 4$7.90$1.15 cached
xiaomi logoMiMo-V2.5-Pro$66.99$2.28 cached

Specs

Context window and capabilities

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

Metricupstage logoSolar Mini 4xiaomi logoMiMo-V2.5-Pro
Context window524K tokens1.05M tokens
Max output131K tokens131K tokens
Input typesTextText
Output typesTextText
Reasoning effort levelsMax, Extra high, High, Medium, Low, Minimal, NoneNot available
Default reasoning effortMediumNot available
Release dateSeptember 23, 2026April 22, 2026

Features

Supported features

API features available for each model.

Metricupstage logoSolar Mini 4xiaomi logoMiMo-V2.5-Pro
Tool callingSupportedSupported
Structured outputsSupportedSupported
JSON modeSupportedSupported
ReasoningSupportedSupported
TemperatureSupportedSupported
Stop sequencesNot supportedSupported
Deterministic seedNot supportedSupported
Verbosity controlNot supportedNot supported

Our take

Solar Mini 4 is 6.5x cheaper for a typical chat. MiMo-V2.5-Pro scores higher on the Artificial Analysis Intelligence Index (26 vs 24.1). MiMo-V2.5-Pro 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 Solar Mini 4 or MiMo-V2.5-Pro 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 MiMo-V2.5-Pro costs $0.44 per 1M input tokens and $0.87 per 1M output tokens.

Which has a bigger context window, Solar Mini 4 or MiMo-V2.5-Pro?

MiMo-V2.5-Pro supports up to 1.05M tokens of context, compared with 524K for Solar Mini 4.

Is Solar Mini 4 smarter than MiMo-V2.5-Pro?

On the Artificial Analysis Intelligence Index, Solar Mini 4 scores 24.1 and MiMo-V2.5-Pro scores 26, putting MiMo-V2.5-Pro ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.

Can I use Solar Mini 4 and MiMo-V2.5-Pro at the same time?

Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Solar Mini 4 and MiMo-V2.5-Pro answer side by side and keep the better response.

upstage logoxiaomi logo

Why choose? Ask both.

Send one prompt to Solar Mini 4 and MiMo-V2.5-Pro at the same time. Compare the answers side by side and keep the best one.