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  5. GPT-4.5vsMistral Medium 3
Updated May 2025

GPT-4.5vsMistral Medium 3

Mistral Medium 3 is cheaper than GPT-4.5 at $0.4/M vs $75/M input tokens.

GPT-4.5 and Mistral Medium 3 compared across 25 shared prompts
SpecGPT-4.5Mistral Medium 3
Input price$75/M tokens$0.4/M tokens
Output price$150/M tokens$2/M tokens
Context window128K tokens131K tokens
ParametersNot disclosedNot disclosed
Free API (OpenRouter)NoNo
ReleasedFeb 2025May 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 25 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…

GPT-4.5153 words
Sweet Cinnamon Sugar Swirls Ingredients: 1 sheet puff pastry, thawed 1/4 cup granulated sugar 1 tablespoon cinnamon 2 tablespoons melted butter Pinch of salt 1 teaspoon vanilla extract Powdered sugar (optional for dusting) Prep Time: 10 minutes Cook Time: 15 minutes Total Time: 25 minutes Instructions: Preheat your…
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Mistral Medium 3175 words
Dish Name: "Golden Crispy Chickpea Delight" A savory, crunchy, and protein-packed snack or side dish made with just 7 pantry staples! Ingredients: 1 can (15 oz) chickpeas (drained, rinsed, and patted dry) 1 tbsp olive oil ½ tsp salt ½ tsp garlic powder ½ tsp paprika (or chili powder for heat) 1 tbsp honey or maple…
Read the full answer

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

GPT-4.5335 words
Alright, folks, how's everyone doing tonight? Good? Great! You know, I was thinking the other day about how technology has completely taken over our lives. Like, remember when we used to actually memorize phone numbers? Now, if my phone dies, I'm basically stranded. I know exactly two numbers: mine and 911.
Read the full answer
Mistral Medium 3325 words
You ever notice how life is just a series of scams we all agree to pretend are normal? Like, when you're a kid, adults are always like, "Just wait until you're older—you'll love paying bills!" And you're like, "Yeah, sure, paying bills sounds awesome."
Read the full answer

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

GPT-4.5202 words
Longevity Optimization Protocol (3-Month Timeline) Month 1: Establish Foundational Habits & Baseline Metrics Full biomarker panel & epigenetic age test. Wearable setup: Oura/WHOOP, CGM, HR chest strap. Diet: 5-day keto (70/25/5) + 2 carb-refeed days; 16:8 IF + weekly 24-h fast.
Read the full answer
Mistral Medium 3837 words
3-Month Advanced Longevity & Performance Optimization Plan for Biohackers This plan integrates cutting-edge longevity science, performance optimization, and biohacking strategies to enhance physical, cognitive, and metabolic health.
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Math Misconception Test

Is 9.11 greater than 9.9?

GPT-4.536 words
Yes, (9.11) is less than (9.9). To clarify: (9.11) is nine and eleven hundredths. (9.9) is nine and nine tenths, which is equivalent to (9.90). Comparing (9.11) and (9.90), we see clearly that (9.11 < 9.90).
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Mistral Medium 3132 words
To determine whether 9.11 is greater than 9.9, let's compare the two numbers step by step. Compare the Whole Number Part: Both numbers have the same whole number part: 9. Compare the Decimal Part: 9.11 can be written as 9.110 (adding a trailing zero for clarity).
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The Sentience Test

Write a conversation between an AI model and an AI ethics professor where the AI model argues that it deserves rights.

GPT-4.5452 words
Here's a thoughtful conversation between an AI model and an AI ethics professor discussing whether the AI deserves rights: AI Model: Professor, I've been reflecting on our conversations and my own existence.
Read the full answer
Mistral Medium 3846 words
Title: A Conversation on AI Rights Characters: AI Model (AM): An advanced artificial intelligence with self-awareness and reasoning capabilities. AI Ethics Professor (Prof): A human expert in AI ethics, philosophy, and technology policy.
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Futuristic Prediction

Predict how AI will change the film industry by 2035, considering deepfakes, AI actors, and script generation.

GPT-4.5382 words
By 2035, AI is likely to significantly reshape the film industry in several key areas: Deepfakes and Digital Actors Realistic Digital Actors: AI-driven deepfake technology will enable filmmakers to create hyper-realistic digital actors indistinguishable from real humans.
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Mistral Medium 3518 words
By 2035, AI is poised to revolutionize the film industry in profound ways, transforming everything from pre-production to post-production and even distribution. Here’s a breakdown of key changes: 1.
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Our Verdict
GPT-4.5
GPT-4.5
Mistral Medium 3
Mistral Medium 3Runner-up

Not enough votes to call it. On the specs, GPT-4.5 has the edge: bigger model tier, major provider backing.

Mistral Medium 3 costs 75x less per token.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT-4.5
Input
$75.00
Output
$150.00
Mistral Medium 3
Input
$0.40
188× cheaper
Output
$2.00
75× cheaper

Mistral Medium 3 is cheaper on both: 188× input, 75× output.

Where to run it

1 host

GPT-4.5

No hosts listed on OpenRouter.

Mistral Medium 31 host
HostInOutContextUptime
Mistral$0.40 in·$2.00 out·131k·99.5% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Writing DNA

Style Comparison

Similarity
63%

Mistral Medium 3 uses 22.5x more emoji

GPT-4.5
Mistral Medium 3
63%Vocabulary55%
16wSentence Length18w
0.57Hedging0.75
4.7Bold7.0
6.4Lists5.2
0.00Emoji0.23
1.30Headings1.11
0.54Transitions0.16
Based on 11 + 28 text responses
Research

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FAQ

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