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Z.AI
Z.AI API and models: 12 models on Impossibl, including GLM-5.3-Flash, GLM-5.3, and GLM-5.3 Fast. Compare pricing per million tokens, context windows, and capabilities between different Z.AI models.
models
12
modalities · in → out
takes text and image in, gives text out
latest release
GLM-5.3-FlashAug 26, 2026
- GLM-5.3-Flash
zai/glm-5.3-flash
GLM-5.3-Flash is the smaller, efficient mixture-of-experts sibling of Z.AI's GLM-5.3, positioned for coding, office documents, and financial research with autonomous tool use.
Z.AIText generationimage input
- context
- 1mtokens
- input price
- $0.15/1m tokens
- output price
- $0.50/1m tokens
- released
- GLM-5.3
zai/glm-5.3
GLM-5.3 is Z.AI's flagship reasoning model, built for complex software engineering, long-horizon agent tasks, and security work such as vulnerability discovery.
Z.AIText generation
- context
- 1mtokens
- input price
- $1.40/1m tokens
- output price
- $4.40/1m tokens
- released
- GLM-5.3 Fast
zai/glm-5.3-fast
GLM-5.3 Fast is a higher-throughput serving variant of Z.AI's GLM-5.3, using the same weights so output quality matches the standard endpoint.
Z.AIText generation
- context
- 1mtokens
- input price
- $2.10/1m tokens
- output price
- $6.60/1m tokens
- released
- GLM-5.2
zai/glm-5.2
GLM-5.2 is Z.AI's flagship foundation model for long-horizon engineering, from project-level codebase takeover and large refactors to deep debugging and research reproduction.
Z.AIText generation
- context
- 1mtokens
- input price
- $1.40/1m tokens
- output price
- $4.40/1m tokens
- released
- GLM-5.1
zai/glm-5.1
GLM-5.1 is Z.AI's flagship coding model, built for long-horizon software tasks that require autonomous planning, bug fixing, and iterative refinement.
Z.AIText generation
- context
- 200ktokens
- input price
- $1.40/1m tokens
- output price
- $4.40/1m tokens
- released
- GLM-5 Turbo
zai/glm-5-turbo
GLM-5 Turbo is a fast-inference member of Z.AI's GLM-5 family, tuned for agent-driven environments such as OpenClaw.
Z.AIText generation
- context
- 200ktokens
- input price
- $1.20/1m tokens
- output price
- $4.00/1m tokens
- released
- GLM-5
zai/glm-5
GLM-5 is Z.AI's flagship open-source foundation model, engineered for complex systems design and long-horizon agent workflows aimed at expert developers.
Z.AIText generation
- context
- 200ktokens
- input price
- $1.00/1m tokens
- output price
- $3.20/1m tokens
- released
- GLM-4.7
zai/glm-4.7
GLM-4.7 is Z.AI's flagship foundation model of the GLM-4 generation, upgraded for programming, reasoning, and agentic work.
Z.AIText generation
- context
- 200ktokens
- input price
- $0.60/1m tokens
- output price
- $2.20/1m tokens
- released
- GLM-4.6
zai/glm-4.6
GLM-4.6 is Z.AI's flagship coding model in the GLM-4 line, built for programming tasks and complex agent work.
Z.AIText generation
- context
- 200ktokens
- input price
- $0.60/1m tokens
- output price
- $2.20/1m tokens
- released
- GLM-4.5
zai/glm-4.5
GLM-4.5 is Z.AI's mixture-of-experts flagship foundation model, purpose-built for agent-based applications spanning reasoning, coding, and agentic tasks.
Z.AIText generation
- context
- 128ktokens
- input price
- $0.60/1m tokens
- output price
- $2.20/1m tokens
- released
- GLM-4.5 Air
zai/glm-4.5-air
GLM-4.5 Air is the lightweight variant of Z.AI's GLM-4.5 family, also purpose-built for agent-centric applications.
Z.AIText generation
- context
- 128ktokens
- input price
- $0.20/1m tokens
- output price
- $1.10/1m tokens
- released
- GLM-5.3-FlashX
zai/glm-5.3-flashx
GLM-5.3-FlashX is the high-speed serving option for Z.AI's natively multimodal GLM-5.3-Flash weights, aimed at latency-sensitive coding and agent loops.
Z.AIText generationimage input
- context
- 1mtokens
- input price
- $0.37/1m tokens
- output price
- $1.25/1m tokens
- released
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compare Z.AI models
compare models with the same model type and billing unit. each comparison includes published api prices, context limits, and capabilities.
frequently asked questions
Which GLM models are available through Impossibl?
The directory lists 12 models from Z.AI available through the Impossibl API, including GLM-5.3-Flash, GLM-5.3, and GLM-5.3 Fast. Open each model page for its API identifier, capabilities, and current pricing.
How much do GLM models cost?
Z.AI model prices vary by model and usage. All rates below are published base API rates in USD. For token-priced models, published input rates start at $0.15 per million input tokens. Published output rates start at $0.50 per million output tokens. Input and output minima may refer to different models. Individual model pages include published cache prices and billing units. Applicable fees and workspace-specific pricing can affect the amount paid.
What is the cheapest GLM model?
By published input rate, the cheapest GLM text generation model on Impossibl is GLM-5.3-Flash (zai/glm-5.3-flash) at $0.15 per million input tokens and $0.50 per million output tokens. Cheapest by input rate is not always cheapest for a workload; output-heavy or cached requests can favor another model.
Does Impossibl add a markup to Z.AI pricing?
No. Usage is charged at the provider's list price with 0% usage markup. Prepaid credit purchases include a 5% platform fee, and there is no subscription. The rates on this page are Z.AI's published base rates, and usage comes off your balance when the request finishes.
What context windows do GLM models support?
Among Z.AI models with a published limit on Impossibl, the largest context window is 1,000,000 tokens, listed for GLM-5.2, GLM-5.3, and GLM-5.3 Fast. Context limits vary by model and are separate from maximum output limits.
What inputs and capabilities do GLM models support?
Available model types include text generation. Published input support includes image and text; support varies by model. Tool-calling support is unspecified for 12 models.
How do I use GLM models through an API?
Use the exact model identifier from the model page with the Impossibl API. For example, select zai/glm-5.3-flash with /v1/chat/completions. Endpoint compatibility depends on the selected model. The API quickstart explains how to create an API key and send a request.