Zhipu lowest-cost cloud API model offering near-instant streaming, high concurrency, and zero cost tier for developers.
Technical Specifications
- Provider
- Zhipu AI
- Category
- lightweight
- Release Date
- 2025-07
- Batch API Discount
- 50% off async batch
- Consumer Subscription
- API Pay-as-you-go
- Reasoning Effort Control
- Fixed
- Structured Outputs
- Yes
- Output Modalities
- text
- Official Documentation
- Visit Official Docs ↗
Data Privacy, Licensing & Deployment Governance
Official Provider Release Intelligence, API Quotas & Agentic Specs
- Official API Model ID (SDK String)
- glm-4-5-flash
- Supported SDK & API Protocol
- Zhipu AI REST API (OpenAI-Compatible)
- Lifecycle & Deprecation Status
- Active GA (Guaranteed support through 2027+)
- Production Rate Limits (RPM & TPM)
- 5,000 – 15,000 RPM (Production Tier) · 800,000 – 2,000,000 TPM
- Long-Context Pricing Tier (>128K / >200K)
- Flat rate ($0.01/1M in) across full 131K window
- Prompt Cache Write & TTL Policy
- Cached input at $0.001/1M tokens
- Computer Use & Browser GUI Agent
- API / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop)
- MCP & Parallel Tool Calling
- Native MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema
- Web Search Grounding & Code Sandbox
- Supported via external Tavily/Exa Search & E2B/Docker Sandbox tools
- Fine-Tuning & Distillation Support
- API Prompt Engineering & RAG Distillation
- Multimodal Tokenization Billing
- Text BPE (~4 chars/token)
- Weights Precision & Quantization
- Cloud-Hosted Proprietary (FP8 / BF16 Tensor Core Cluster)
- Minimum GPU VRAM Requirement
- Zero Local VRAM Required (100% Serverless Cloud API)
- Supported Inference Engines
- Managed Zhipu AI Cloud API
- System Card & Safety Framework
- Zhipu AI Production Safety & Alignment Verified
- Enterprise Compliance (SOC2 / HIPAA / ZDR)
- SOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier
GLM-4.5-Flash Cost, Context, Hardware & API Integration
Pay-as-you-go API is cheaper for this volume (saves $19.37/mo vs $20 flat plan).
Break-even point: ~15,873 requests/day equals $20/month.
Same Monthly Workload Cost Across Popular Reference Models
Live Prompt Paste Tokenizer & Cost Counter
Paste real system instructions, JSON schemas, or code to measure BPE token counts across tokenizers.
Hybrid Prompt Routing Cascade Simulator
Route routine queries to a fast lightweight model ($0.15/1M) and escalate only complex reasoning turns to GLM-4.5-Flash:
Benchmark Scores & 6-Axis Capability Radar
- MMLU-Pro
- 68%
- HumanEval
- 79%
- Chatbot Arena Elo
- 1240pts
Strengths
- Virtually free API pricing ($0.01 / 1M input tokens) with generous developer free tiers
- Sub-250ms initial token latency and high streaming bandwidth
- Reliable JSON mode output for high-volume data transformation
Limitations & Trade-offs
- Not suitable for deep STEM reasoning or complex multithreaded coding
- Context window limited to 131K tokens
Editorial Assessment
The ultimate budget API choice in the Zhipu ecosystem, delivering extreme speed at negligible cost.
Best for: High-frequency classification, customer chatbots, translation, and automated web scrapers
Compare GLM-4.5-Flash
Frequently Asked Questions about GLM-4.5-Flash
How much does the GLM-4.5-Flash API cost per 1M tokens?+
GLM-4.5-Flash by Zhipu AI is priced at $0.01 per 1M input tokens and $0.02 per 1M output tokens. With prompt caching enabled, cached input tokens cost $0.001 per 1M tokens, and asynchronous Batch API requests receive a 50% discount.
Should I use a $20/month subscription or the GLM-4.5-Flash pay-as-you-go API?+
A flat $20/month consumer subscription is predictable for daily interactive chat and manual coding. However, if you are building software, running automated workflows, or sending low-to-moderate volume with prompt caching enabled, the pay-as-you-go API is typically far more cost-effective and offers higher rate limits without manual UI caps.
How many words and pages fit in GLM-4.5-Flash's context window?+
GLM-4.5-Flash features a 131K tokens context window, which equals approximately 98,304 English words or ~262 standard single-spaced pages in a single prompt. Its maximum output generation per turn is 8,192 tokens.
Can I run GLM-4.5-Flash locally on my own GPU (Open Weights)?+
No, GLM-4.5-Flash is a proprietary closed-weights model hosted by Zhipu AI. It cannot be downloaded for local GPU execution and must be accessed via Zhipu AI's official API or cloud platform.
Does Zhipu AI train on data sent to the GLM-4.5-Flash API, and is commercial use allowed?+
API payloads are excluded from model training by default. License tier: Proprietary Commercial API (Zhipu AI Terms). Full commercial ownership of generated outputs. Supported deployment channels include: Zhipu AI Cloud API & Enterprise Endpoints.
How does GLM-4.5-Flash perform on coding and reasoning benchmarks?+
GLM-4.5-Flash achieves a composite Intelligence Index of 72/100, scoring N/A% on SWE-bench Verified, N/A% on GPQA Diamond, 68% on MMLU-Pro, and 1240 pts on Chatbot Arena Elo.
What is GLM-4.5-Flash best used for?+
GLM-4.5-Flash is best suited for: High-frequency classification, customer chatbots, translation, and automated web scrapers. Assessment: The ultimate budget API choice in the Zhipu ecosystem, delivering extreme speed at negligible cost.
Zhipu AI Family Lineage, Routing Tiers & Upgrade Path
Step down to a lighter sibling for high-volume routing or step up to Zhipu AI's flagship reasoning tier:
GLM-5.2
GLM-5.1
GLM-5V-Turbo
GLM-5-Turbo
GLM-5
GLM-4.7-FlashX
AI Glossary & Architecture Concepts
View full glossary →Key machine learning concepts and benchmarks relevant to GLM-4.5-Flash:
The basic unit of text that a language model processes, typically representing about 3 to 4 English characters or roughly 0.75 words. For example, the sentence "Artificial intelligence is fast" breaks down into about 5 tokens.
A standardized evaluation suite used to objectively measure and rank an AI model's capabilities across specific tasks — such as SWE-bench Verified for software engineering, AIME for competitive math, or MMLU for general knowledge.
The maximum number of tokens a model can consider at once — both the input it reads and the output it writes. A 1,000,000-token context window can hold roughly 750,000 English words in a single request.
An AI model trained via reinforcement learning to spend dynamic compute thinking through complex logic, math, and architectural problems before outputting a solution. Examples include OpenAI o1, o3, and DeepSeek R1.
A step-by-step reasoning technique where an AI model generates intermediate problem-solving thoughts before arriving at a final answer. Native reasoning models like OpenAI o3 and DeepSeek R1 use CoT to solve complex math and coding challenges.
The ability of a language model to recognize when an external capability is needed and output structured JSON arguments to invoke external APIs, databases, or terminal commands. The runtime executes the tool and passes results back to the model.
Benchmark scores, token prices, and rate limits evolve rapidly as AI labs release model updates. Always verify current specifications and pricing on the official provider documentation.
Sources: Zhipu AI BigModel Platform Pricing↗