What is the difference between Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash?

Gemini 2.5 Flash Preview (thinking) is developed by Google AI while GLM 5.3 Flash is developed by Zhipu AI. Gemini 2.5 Flash Preview (thinking) has a 1.0M token context window vs GLM 5.3 Flash's 1.3M. You can compare their actual outputs across 2 challenges on Rival to see how they differ in practice.

Which is better, Gemini 2.5 Flash Preview (thinking) or GLM 5.3 Flash?

It depends on your use case. Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 2 challenges so you can judge which fits your needs best.

How much does Gemini 2.5 Flash Preview (thinking) cost compared to GLM 5.3 Flash?

Gemini 2.5 Flash Preview (thinking) costs $0.175/M input tokens and GLM 5.3 Flash costs $0.15/M input tokens. GLM 5.3 Flash is $0.02/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 Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash on Rival?

This page shows a side-by-side comparison of Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash 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 Aug 2026

Gemini 2.5 Flash Preview (thinking)vsGLM 5.3 Flash

GLM 5.3 Flash is cheaper than Gemini 2.5 Flash Preview (thinking) at $0.15/M vs $0.175/M input tokens.

Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash compared across 2 shared prompts
Spec	Gemini 2.5 Flash Preview (thinking)	GLM 5.3 Flash
Input price	$0.175/M tokens	$0.15/M tokens
Output price	$3.5/M tokens	$0.5/M tokens
Context window	1.0M tokens	1.3M tokens
Weights	—	Open
Free API (OpenRouter)	No	No
Released	Apr 2025	Aug 2026

Side by side

Same prompt, both answers

Opening lines from every prompt 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…

Gemini 2.5 Flash Preview (thinking)272 words

Okay, here is a simple, delicious savory recipe using only 7 common pantry ingredients. Dish Name: Sunshine Lentil Soup This is a bright, comforting soup that\'s surprisingly flavorful with just a few staples.

Read the full answer

GLM 5.3 Flash205 words

Golden Hour Garlic Butter Pasta A silky, savory pasta that comes together faster than delivery! Ingredients (serves 2): 8 oz spaghetti or any pasta 4 tbsp butter 4 cloves garlic, minced (or 1 tsp garlic powder) ½ cup grated Parmesan cheese ½ cup pasta water (reserved) 1 tsp red pepper flakes Salt Prep time: 5 minutes…

Read the full answer

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…

Gemini 2.5 Flash Preview (thinking)867 words

Okay, here is a simple, actionable 1-month plan for a beginner focusing on Diet, Exercise, and Sleep for better health and longevity. Goal: To build foundational, sustainable habits in 3 key health areas over 30 days.

Read the full answer

GLM 5.3 Flash327 words

1-Month Beginner Health & Longevity Plan 🥗 Area 1: Diet — "Add Before You Subtract" Week 1: Add one vegetable or fruit to every meal. Don't cut anything yet—just add. Week 2: Swap one sugary drink per day for water or unsweetened tea.

Read the full answer

Our Verdict

GLM 5.3 Flash

Gemini 2.5 Flash Preview (thinking)Runner-up

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

GLM 5.3 Flash costs 7.0x less per token.

Too close to call

API pricing

Cost per 1M tokens

Gemini 2.5 Flash Preview (thinking)

Input

$0.17

Output

$3.50

GLM 5.3 Flash

Input

$0.15

1.2× cheaper

Output

$0.50

7.0× cheaper

GLM 5.3 Flash is cheaper on both: 1.2× input, 7.0× output.

Where to run it

29 hosts, cheapest first

Gemini 2.5 Flash Preview (thinking)

No hosts listed on OpenRouter.

GLM 5.3 Flash29 hosts

HostInOutContextUptime

DeepInfrafp4$0.07 in$0.25 out1M99% up InferenceNetfp4$0.09 in$0.28 out1M97.8% up GMI Cloudfp8$0.09 in$0.30 out1M99.2% up Wafer$0.10 in$0.35 out1M99.8% up Relace$0.10 in$0.36 out1M99.9% up OpenInferencefp4$0.10 in$0.50 out1M99.2% up

23 more hosts

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

Keep exploring

More comparisons

Same prompt, both answers

Simple 7-Ingredient Recipe

Beginner's Longevity Plan

Cost per 1M tokens

29 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash?

Which is better, Gemini 2.5 Flash Preview (thinking) or GLM 5.3 Flash?

How much does Gemini 2.5 Flash Preview (thinking) cost compared to GLM 5.3 Flash?

How can I compare Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages

Same prompt, both answers

Simple 7-Ingredient Recipe

Beginner's Longevity Plan

Cost per 1M tokens

29 hosts, cheapest first

What we learned reading every model

Common questions

What is the difference between Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash?

Which is better, Gemini 2.5 Flash Preview (thinking) or GLM 5.3 Flash?

How much does Gemini 2.5 Flash Preview (thinking) cost compared to GLM 5.3 Flash?

How can I compare Gemini 2.5 Flash Preview (thinking) and GLM 5.3 Flash on Rival?

More comparisons

Against the newest arrivals

Same lab, same size, long tail

Model pages