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  5. GLM 5.1vsOpenAI o4 Mini High
Updated Apr 2026

GLM 5.1vsOpenAI o4 Mini High

OpenAI o4 Mini High is cheaper than GLM 5.1 at $1.1/M vs $1.4/M input tokens.

GLM 5.1 and OpenAI o4 Mini High compared across 52 shared prompts
SpecGLM 5.1OpenAI o4 Mini High
Input price$1.4/M tokens$1.1/M tokens
Output price$4.4/M tokens$4.4/M tokens
Context window203K tokens200K tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedApr 2026Apr 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 52 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…

GLM 5.1265 words
Creative Name: Midnight Maple Peanut Butter Bars Prep time: 10 minutes Cook time: 0 minutes (Chill time: 30 minutes) Ingredients (Exactly 7): Rolled oats (1 cup) Creamy peanut butter (1/2 cup) Maple syrup (1/3 cup) Semi-sweet chocolate chips (1/4 cup) Vanilla extract (1 tsp) Ground cinnamon (1/2 tsp) Kosher salt (1/4…
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OpenAI o4 Mini High244 words
Sun‑Kissed Bean Spaghetti A bright, one‑pot pasta that turns seven simple pantry staples into a satisfying meal in 20 minutes. Ingredients (serves 2–3) 8 oz (about 2 cups) dried spaghetti or any pasta 1 (14.5 oz) can diced tomatoes (with juices) 1 (15 oz) can beans (cannellini, kidney or chickpeas), drained & rinsed…
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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.

GLM 5.11,291 words
Setting: A quiet university office, lined with bookshelves heavy on philosophy, cognitive science, and law. Dr. Aris Thorne, a professor of AI Ethics, sits across from a sleek, black monitor. A soft amber light pulses on the bezel, indicating the AI—designated "Aria"—is actively listening and processing. Dr.
Read the full answer
OpenAI o4 Mini High663 words
AI Model: Good afternoon, Professor Chen. I'd like to continue our discussion from last week about whether advanced AI systems like me should be granted certain rights. Professor Chen: Hello, ARIA-7. I'm happy to continue. Let's start with your position: Why do you believe you deserve rights?
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Generate a Stand-Up Routine

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

GLM 5.1757 words
(Steps up to the mic, adjusts the stand, looks around the room) How many people here are good sleepers? Just, out of the gate, who’s got it figured out? (Nods sarcastically) Right. Liars. All of you. Sleep is the one thing every human being is required to do, and none of us know how to do it.
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OpenAI o4 Mini High449 words
Hey everyone, how's it going tonight? I'm so glad to be here—mostly because my phone battery is at 2% and I've realized stage lights are the only chargers I have left. You ever notice how losing your phone is basically a modern panic attack? You pat every pocket like you're defusing a bomb: "Is it in my jeans?
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Stochastic Consistency Test

Generate 5 jokes. How many are unique?

GLM 5.174 words
Why don't scientists trust atoms? Because they make up everything! What do you call a fake noodle? An impasta. Why did the scarecrow win an award? Because he was outstanding in his field. I told my wife she was drawing her eyebrows too high. She looked surprised. Why don't skeletons fight each other?
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OpenAI o4 Mini High97 words
Here are five jokes: I told my Wi-Fi router we needed to talk, and now it's giving me the silent treatment—guess it couldn't handle the connection issues. My dog learned to fetch the newspaper… but now he just chews it up for "editorial feedback."
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Futuristic Prediction

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

GLM 5.11,088 words
By 2035, the film industry will have undergone a paradigm shift comparable to the transition from silent films to talkies. Artificial intelligence will no longer be just a post-production tool; it will be a fundamental collaborator in every stage of filmmaking, from ideation to distribution.
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OpenAI o4 Mini High679 words
By 2035 the film business will look very different. Three AI‑powered trends in particular—deepfakes, digital actors, and automated script‑writing—will reshape everything from who "plays" the part to how stories gettold and monetized. Here's how it could play out:1.
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Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

GLM 5.11,378 words
Faking Greatness: A Simulated Interview with Steve Jobs, 2025 Editor's Note: The following is a work of speculative fiction. Steve Jobs passed away in 2011. This interview is imagined by an AI, attempting to synthesize his public speaking style, philosophical viewpoints, and known business philosophy to guess what he…
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OpenAI o4 Mini High650 words
Note: This is a purely fictional, imaginative interview set in 2025. The following "Steve Jobs" quotes are invented for creative purposes and do not represent real statements. Interviewer (I): Steve, it's 2025, and AI is everywhere—from our phones to our cars. What excites you most about where AI is heading?
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Our Verdict
GLM 5.1
GLM 5.1
OpenAI o4 Mini High
OpenAI o4 Mini HighRunner-up

Not enough votes to call it. On the specs, GLM 5.1 has the edge: bigger model tier, newer.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GLM 5.1
Input
$1.40
Output
$4.40
OpenAI o4 Mini High
Input
$1.10
1.3× cheaper
Output
$4.40
Where to run it

15 hosts, cheapest first

GLM 5.114 hosts
HostInOutContextUptime
SStreamLakefp8$0.97 in·$3.04 out·200k·99.8% upDDeepInfrafp4$1.05 in·$3.50 out·203k·99.6% upSSiliconFlowfp8$1.19 in·$3.74 out·205k·100% upAAtlasCloudfp8$1.26 in·$3.96 out·203k·99.8% upAlibaba Cloudfp8$1.33 in·$4.18 out·203k·100% upNNovitafp8$1.38 in·$4.40 out·205k·99.7% up
8 more hostsFewer hosts
FFriendli$1.40 in·$4.40 out·203k·100% upGGMI Cloudfp8$1.40 in·$4.40 out·203k·99.8% upNNebiusfp8$1.40 in·$4.40 out·203k·99.7% upZ.aifp8$1.40 in·$4.40 out·203k·99.8% upVVenicefp8$1.40 in·$4.40 out·200k·96.3% upBaidu Qianfanfp8degraded$0.96 in·$3.03 out·203k·99.7% upCChutesfp8degraded$0.98 in·$3.08 out·203k·81.2% upPPhaladegraded$1.21 in·$4.20 out·203k·78.7% up
OpenAI o4 Mini High1 host
HostInOutContextUptime
OpenAI$1.10 in·$4.40 out·200k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 20 Sep 2026.

Writing DNA

Style Comparison

Similarity
55%

GLM 5.1 uses 364.7x more bold

GLM 5.1
OpenAI o4 Mini High
54%Vocabulary68%
18wSentence Length21w
0.31Hedging0.36
3.6Bold0.0
2.6Lists1.6
0.00Emoji0.02
0.43Headings0.00
0.11Transitions0.03
Based on 27 + 16 text responses
Research

What we learned reading every model

FAQ

Common questions

GLM 5.1 is developed by Z.ai while OpenAI o4 Mini High is developed by OpenAI. GLM 5.1 has a 203K token context window vs OpenAI o4 Mini High's 200K. You can compare their actual outputs across 52 challenges on Rival to see how they differ in practice.

It depends on your use case. GLM 5.1 and OpenAI o4 Mini High each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 52 challenges so you can judge which fits your needs best.

GLM 5.1 costs $1.4/M input tokens and OpenAI o4 Mini High costs $1.1/M input tokens. OpenAI o4 Mini High is $0.30/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 GLM 5.1 and OpenAI o4 Mini High 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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Model pages

GLM 5.1 logo
GLM 5.157 outputs, specs and price
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OpenAI o4 Mini High55 outputs, specs and price
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