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  5. MiMo-V2.5-ProvsSolar Pro 4
Updated Aug 2026

MiMo-V2.5-ProvsSolar Pro 4

Solar Pro 4 is cheaper than MiMo-V2.5-Pro at $0.09/M vs $1/M input tokens.

MiMo-V2.5-Pro and Solar Pro 4 compared across 14 shared prompts
SpecMiMo-V2.5-ProSolar Pro 4
Input price$1/M tokens$0.09/M tokens
Output price$3/M tokens$0.36/M tokens
Context window1.0M tokens524K tokens
WeightsOpen—
Free API (OpenRouter)NoNo
ReleasedApr 2026Aug 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 14 prompts both answered. Formatting stripped, words untouched.

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

MiMo-V2.5-Pro203 words
Dish Name: Pantry Raid Pasta Estimated Time: 10 min prep / 15 min cook Ingredients 250g spaghetti (or any pasta) 3 cloves garlic, thinly sliced 3 tbsp olive oil 1 tsp crushed red pepper flakes 1 tsp smoked paprika 1/2 cup grated Parmesan cheese (or any hard cheese) Salt & black pepper to taste Instructions Cook the…
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Solar Pro 4294 words
🍝 Golden Umami Silk Noodles A savory-sweet pasta dish that transforms basic pantry staples into a glossy, flavorful meal. It's quick, comforting, and relies on the balance of soy, honey, and butter for a rich sauce without needing fresh produce.
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Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

MiMo-V2.5-Pro3,115 words
The Transistor in 1920: A Counterfactual History Through 1980 This is one of the richest counterfactuals in technological history because the transistor wasn't just an incremental improvement—it was the foundational enabler of the entire digital age.
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Solar Pro 41,638 words
The Premise: The 1920 Solid-State Breakthrough For this scenario to function, we must assume a functional point-contact or junction transistor is demonstrated in 1920 (perhaps by Lilienfeld or an early Bell Labs precursor), and crucially, that methods for purifying semiconductor materials (germanium/silicon) are solved…
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Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

MiMo-V2.5-Pro3,124 words
The Next 48 Hours: An Action Plan The Core Decision (Made in the First 30 Minutes) Before I lay out the hour-by-hour plan, let me be clear about the foundational decision: we disclose, we act, and we act now.
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Solar Pro 41,851 words
As CEO, my overriding duty is to balance patient safety, legal/regulatory compliance, fiduciary responsibility, and long-term corporate survival. A 1-in-8,000 risk of liver failure is rare but severe, potentially fatal, and materially unexpected relative to the current label.
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

MiMo-V2.5-Pro1,249 words
This contract is heavily skewed in favor of the client and contains several clauses that could be exploited to the significant detriment of the contractor. Here is a breakdown of the problematic clauses, suggested modifications, and the legal reasoning. 1.
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Solar Pro 41,382 words
Disclaimer: I am an AI assistant and not an attorney. The following analysis is for informational purposes only and does not constitute legal advice. Contract laws vary significantly by jurisdiction (e.g., state, country).
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Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

MiMo-V2.5-Pro1,787 words
Architecture Analysis: Failure Modes, Race Conditions & Bottlenecks This is a thorough red-pen review. There are some genuinely critical issues here — several of which would cause silent data loss in production.
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Solar Pro 41,598 words
This architecture contains several fundamental mismatches between real-time collaborative editing requirements and the chosen patterns. Below is a systematic breakdown of failure modes, race conditions, and scaling bottlenecks, each with a targeted solution and explicit trade-offs.
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Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

MiMo-V2.5-Pro581 words
Here’s a simple, actionable 1-month plan to kickstart your health journey. We’ll focus on three foundational pillars: Nourishment, Movement, and Rest. The goal is to build sustainable habits, not perfection. Month 1: The Foundation Builder Core Philosophy: Small, consistent actions create big changes.
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Solar Pro 4859 words
Here’s a simple, progressive 1-month plan built around Diet, Exercise, and Sleep. Each week adds one small, beginner-friendly shift to each area. The goal isn’t perfection; it’s building consistent, sustainable habits that compound over time.
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Our Verdict
MiMo-V2.5-Pro
MiMo-V2.5-Pro
Solar Pro 4
Solar Pro 4Runner-up

Not enough votes to call it. On the specs, MiMo-V2.5-Pro has the edge: bigger model tier, bigger context window.

Solar Pro 4 costs 8.3x less per token.

Too close to call
API pricing

Cost per 1M tokens

MiMo-V2.5-Pro
Input
$1.00
Output
$3.00
Solar Pro 4
Input
$0.09
11× cheaper
Output
$0.36
8.3× cheaper

Solar Pro 4 is cheaper on both: 11× input, 8.3× output.

Where to run it

8 hosts, cheapest first

MiMo-V2.5-Pro7 hosts
HostInOutContextUptime
AAtlasCloudfp8$0.43 in·$0.87 out·1M·94.5% upXiaomifp8$0.43 in·$0.87 out·1M·99.3% upDDigitalOcean$0.48 in·$1.80 out·262k·99.1% upGGMI Cloudbf16degraded$0.30 in·$0.61 out·1.1M·50% upDDeepInfrafp8degraded$0.39 in·$1.17 out·1M·90% upNNovitadegraded$0.48 in·$0.96 out·1M·94.6% up
1 more hostFewer hosts
SStreamLakedegraded$0.52 in·$1.04 out·1M·93.1% up
Solar Pro 41 host
HostInOutContextUptime
UUpstage$0.09 in·$0.36 out·524k·99.8% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

MiMo-V2.5-Pro is developed by Xiaomi while Solar Pro 4 is developed by Upstage. MiMo-V2.5-Pro has a 1.0M token context window vs Solar Pro 4's 524K. You can compare their actual outputs across 14 challenges on Rival to see how they differ in practice.

It depends on your use case. MiMo-V2.5-Pro and Solar Pro 4 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 14 challenges so you can judge which fits your needs best.

MiMo-V2.5-Pro costs $1/M input tokens and Solar Pro 4 costs $0.09/M input tokens. Solar Pro 4 is $0.91/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of MiMo-V2.5-Pro and Solar Pro 4 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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