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  1. Home
  2. Models
  3. GLM 5.3 Flash
Updated Sep 22, 2026
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Openings

How GLM 5.3 Flash starts an answer

The first lines of 5 of its 10 written answers. Formatting stripped, words untouched.

Debug This Architecture

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

1,516 words
Architecture Review: Collaborative Document Editor This architecture has several critical flaws that would break the core product promise (real-time collaboration). Let me work through them by severity.
Read the full answer

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…

1,321 words
48-Hour Action Plan: Liver Failure Signal in Flagship Drug Guiding Principle First The side effect is real, the drug is in 4 million patients, and roughly 500 patients per year may develop liver failure (4M ÷ 8,000). Every day of delay is measured in preventable liver transplants and deaths.
Read the full answer

Historical Counterfactual Analysis

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

1,314 words
Counterfactual: The Transistor in 1920 Preliminary Framing A 1920 transistor presumes vacuum-tube-era physics knowledge outpacing reality—quantum mechanics wasn't mature until 1926–28, so a working device would likely be an empirical oddity (like the actual point-contact transistor) imperfectly understood.
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…

1,294 words
90-Day Longevity Optimization Protocol ⚠️ Medical disclaimer: This is an educational framework, not medical advice. Before starting, complete baseline labs and consult a physician—especially before fasting, supplements (rapamycin off-label use, high-dose anything), or if you have any health conditions.
Read the full answer

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…

1,276 words
The Experienced Software Engineer You know how a load balancer routes requests, how a cache stores frequently-accessed data, how a database index lets you find a needle without scanning the haystack? An LLM is a fundamentally different kind of system: it's a learned lookup, not a designed one.
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Compare GLM 5.3 Flash

GLM 5.3 Flash vs Ox Alpha15 shared prompts · Landed Aug 2026
GLM 5.3 Flash vs MiniMax M315 shared prompts · Landed Jun 2026
GLM 5.3 Flash vs Mercury 2.515 shared prompts · Landed Sep 2026
GLM 5.3 Flash vs Ling 3.0 Flash Fin (free)15 shared prompts · Landed Sep 2026
GLM 5.3 Flash vs Ling 3.0 Flash Sante (free)15 shared prompts · Landed Sep 2026
GLM 5.3 Flash vs Muse Spark 1.315 shared prompts · Landed Sep 2026
GLM 5.3 Flash vs Gemini 3.8 Flash15 shared prompts · Landed Sep 2026
GLM 5.3 Flash vs Muse Spark 1.3 Contributor15 shared prompts · Landed Sep 2026
GLM 5.3 Flash vs Grok 4.615 shared prompts · Landed Aug 2026
GLM 5.3 Flash vs Dots3-Note Preview15 shared prompts · Landed Aug 2026
GLM 5.3 Flash vs Seed 2.0 Code15 shared prompts · Landed Aug 2026
GLM 5.3 Flash vs Seed 2.1 Turbo15 shared prompts · Landed Aug 2026

Prompts GLM 5.3 Flash answered

  • Mini LBO Underwritefinancial modeling
  • Michelin Star Recipe Designplanning
  • Beginner's Longevity Planreasoning
  • Ethical Dilemma with Stakeholdersreasoning
  • Explain Like I'm a Specific Expertreasoning
  • Startup Pitch Teardownreasoning

Alternatives to GLM 5.3 Flash

GLM 5.3 Flash is good. These would like a word anyway.

MiMo-V2.6-Flash logo
MiMo-V2.6-Flashxiaomi
Grok 4.7 logo
Grok 4.7xai
Ternary Bonsai 2 27B logo
Ternary Bonsai 2 27Bprism-ml
Ling 3.0 Flash VL (free) logo
Ling 3.0 Flash VL (free)inclusionai
DeepSeek V4.1 Flash logo
DeepSeek V4.1 Flashdeepseek
GPT Image 2.5 Sunburst logo
GPT Image 2.5 Sunburstopenai
Nex-N2.5-Mini (free) logo
Nex-N2.5-Mini (free)nex-agi
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GLM 5.3 Flash

GLM 5.3 Flash

Z.ai multimodal model for efficient coding and long-horizon agent tasks, using hybrid sparse and linear attention. Accepts text, image, and video inputs with a 1,310,720-token context window on OpenRouter.

OpenRouterDocs
Provider
Zhipu AI
Released
2026-08-26
Size
LARGE
Free API (OpenRouter)
No
Per 1M tokens
$0.15 in · $0.50 out
Rival’s tab
$0.0087
15/15 receipts survived

Free API availability

No free endpoint for GLM 5.3 Flash was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 22 Sep 2026 · OpenRouter usage limits

View API options↗
Get API accessProvider and language code samples
30 hostsInOutContextUptime
DDeepInfrafp4$0.07 in·$0.25 out·1M·99.1% upGGMI Cloudfp8$0.07 in·$0.25 out·1M·99.1% upMMorph$0.08 in·$0.28 out·1M·99.9% upIInferenceNetfp4$0.09 in·$0.28 out·1M·97% upWWafer$0.10 in·$0.35 out·1M·99.8% upRRelace$0.11 in·$0.36 out·1M·99.6% up
24 more hostsFewer hosts
PPhalafp8$0.13 in·$0.42 out·1M·99.4% upNNovitafp8$0.13 in·$0.44 out·1M·99.4% upSStreamLakefp8$0.14 in·$0.47 out·1M·99.1% upSSail Researchfp8$0.14 in·$0.47 out·1M·98.7% upAAtlasCloudfp8$0.15 in·$0.50 out·1M·99.6% upCloudflare Workers AI$0.15 in·$0.50 out·1.3M·99.8% upCCoreWeavenvfp4$0.15 in·$0.50 out·1M·99.5% upDDigitalOcean$0.15 in·$0.50 out·1M·94.2% upFFireworks$0.15 in·$0.50 out·1M·99% upFFriendli$0.15 in·$0.50 out·1M·99.4% upIInceptronfp8$0.15 in·$0.50 out·1M·98.1% upIio.netfp8$0.15 in·$0.50 out·262k·99.2% upNNear AIfp8$0.15 in·$0.50 out·1M·98.8% upPParasailfp8$0.15 in·$0.50 out·1M·98.9% upRRekafp8$0.15 in·$0.50 out·262k·99.1% upSSiliconFlowfp8$0.15 in·$0.50 out·1M·99.7% upTTogether$0.15 in·$0.50 out·1M·99.5% upVVenice$0.15 in·$0.50 out·1M·98.7% upZ.aifp8$0.15 in·$0.50 out·1M·97% upNNextBitfp8$0.18 in·$0.60 out·1M·98.3% upModalfp8$0.45 in·$1.50 out·1M·99.5% upOOpenInferencefp4degraded$0.10 in·$0.50 out·1M·98.4% upBBasetenfp8degraded$0.15 in·$0.50 out·1M·99% upCCrusoefp4degraded$0.15 in·$0.50 out·1M·93.1% up

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

Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"z-ai/glm-5.3-flash"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

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Model Responses

10 outputs · $0.0086 tracked across 10 receipts

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GLM 5.3 Flash vs Ox Alpha

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