What is the difference between GLM 5.3 FlashX and GPT-4.1 Nano?

GLM 5.3 FlashX is developed by Zhipu AI while GPT-4.1 Nano is developed by OpenAI. GLM 5.3 FlashX has a 1.0M token context window vs GPT-4.1 Nano's 1.0M. You can compare their actual outputs across 3 challenges on Rival to see how they differ in practice.

Which is better, GLM 5.3 FlashX or GPT-4.1 Nano?

It depends on your use case. GLM 5.3 FlashX and GPT-4.1 Nano each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 3 challenges so you can judge which fits your needs best.

How much does GLM 5.3 FlashX cost compared to GPT-4.1 Nano?

GLM 5.3 FlashX costs $0.37/M input tokens and GPT-4.1 Nano costs $0.1/M input tokens. GPT-4.1 Nano is $0.27/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare GLM 5.3 FlashX and GPT-4.1 Nano on Rival?

This page shows a side-by-side comparison of GLM 5.3 FlashX and GPT-4.1 Nano 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.

Updated Sep 2026

GLM 5.3 FlashXvsGPT-4.1 Nano

GPT-4.1 Nano is cheaper than GLM 5.3 FlashX at $0.1/M vs $0.37/M input tokens.

GLM 5.3 FlashX and GPT-4.1 Nano compared across 3 shared prompts
Spec	GLM 5.3 FlashX	GPT-4.1 Nano
Input price	$0.37/M tokens	$0.1/M tokens
Output price	$1.25/M tokens	$0.4/M tokens
Context window	1.0M tokens	1.0M tokens
Weights	—	Closed
Free API (OpenRouter)	No	No
Released	Sep 2026	Apr 2025

Side by side

Same prompt, both answers

Opening lines from 2 of the 3 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 5.3 FlashX172 words

Golden Honey Garlic Chickpea Crunch A crispy, sweet-savory skillet dish that works as a snack, side, or topping for rice. Ingredients (7): 1 can chickpeas (drained, patted dry) 3 tbsp honey 3 tbsp soy sauce 3 cloves garlic (minced) 2 tbsp olive oil ½ tsp red pepper flakes 2 tbsp sesame seeds (or crushed peanuts) Prep…

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GPT-4.1 Nano199 words

Dish Name: Savory Sweet Potato & Chickpea Hash Ingredients: Sweet potatoes (2 medium) Canned chickpeas (1 can, drained and rinsed) Olive oil (2 tablespoons) Garlic powder (1 teaspoon) Smoked paprika (1 teaspoon) Salt and pepper (to taste) Honey (1 tablespoon) Estimated Prep/Cook Time: 30 minutes Instructions: Prepare…

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Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

GLM 5.3 FlashX1,267 words

The Skeptical Software Engineer Yes, at inference time an LLM really is just "predict the next token, repeat" — a deterministic function (plus sampling noise) that maps a sequence of tokens to a probability distribution.

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GPT-4.1 Nano629 words

1. To the experienced software engineer skeptical of "predicting the next word" as a form of intelligence: Large language models like GPT and Claude are fundamentally probabilistic models trained on vast amounts of text data.

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Our Verdict

GLM 5.3 FlashX

GPT-4.1 NanoRunner-up

Not enough votes to call it. On the specs, GLM 5.3 FlashX has the edge: bigger model tier, newer.

GPT-4.1 Nano costs 3.1x less per token.

Too close to call

API pricing

Cost per 1M tokens

GLM 5.3 FlashX

Input

$0.37

Output

$1.25

GPT-4.1 Nano

Input

$0.10

3.7× cheaper

Output

$0.40

3.1× cheaper

GPT-4.1 Nano is cheaper on both: 3.7× input, 3.1× output.

Where to run it

3 hosts

GLM 5.3 FlashX1 host

HostInOutContextUptime

Z.aifp8$0.37 in$1.25 out1M100% up

GPT-4.1 Nano2 hosts

HostInOutContextUptime

Azure AI Foundry$0.10 in$0.40 out1M99.7% up OpenAI$0.10 in$0.40 out1M99.8% up

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

Research

What we learned reading every model

FAQ

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More comparisons

Same prompt, both answers

Simple 7-Ingredient Recipe

Explain Like I'm a Specific Expert

Cost per 1M tokens

3 hosts

What we learned reading every model

Common questions

What is the difference between GLM 5.3 FlashX and GPT-4.1 Nano?

Which is better, GLM 5.3 FlashX or GPT-4.1 Nano?

How much does GLM 5.3 FlashX cost compared to GPT-4.1 Nano?

How can I compare GLM 5.3 FlashX and GPT-4.1 Nano on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Same prompt, both answers

Simple 7-Ingredient Recipe

Explain Like I'm a Specific Expert

Cost per 1M tokens

3 hosts

What we learned reading every model

Common questions

What is the difference between GLM 5.3 FlashX and GPT-4.1 Nano?

Which is better, GLM 5.3 FlashX or GPT-4.1 Nano?

How much does GLM 5.3 FlashX cost compared to GPT-4.1 Nano?

How can I compare GLM 5.3 FlashX and GPT-4.1 Nano on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages