# GLM 5.3 Flash API Pricing

As of October 10, 2026, GLM 5.3 Flash costs $0.15 per 1M input tokens and $0.50 per 1M output tokens on Z.ai, with cache reads at $0.03 and cache writes at $0 per 1M tokens. Across 11 providers on LiteLLM, the input price ranges from $0.11 to $0.15. It has a 1,048,576-token context window and returns up to 128,000 tokens per response.

- Page: https://models.litellm.ai/models/glm-5.3-flash
- Lab: Z.ai
- LiteLLM model name: `zai/glm-5.3-flash`
- Context window: 1,048,576 tokens
- Max output: 128,000 tokens
- Added to LiteLLM: August 27, 2026
- Prices updated: October 10, 2026

## Pricing by provider

Token prices in USD per 1M tokens.

| Provider | Model name | Input | Output | Cache read | Per image | Per second | Context |
|---|---|---|---|---|---|---|---|
| Z.ai | `zai/glm-5.3-flash` | $0.15 | $0.50 | $0.03 | – | – | 1M |
| AIHubMix | `aihubmix/glm-5.3-flash` | $0.1127 | $0.3944 | $0.02817 | – | – | 1M |
| Baseten | `baseten/zai-org/GLM-5.3-Flash` | $0.15 | $0.50 | $0.03 | – | – | 1M |
| Databricks | `databricks/databricks-glm-5-3-flash` | $0.15 | $0.50 | $0.03003 | – | – | 1M |
| Fireworks AI | `fireworks_ai/accounts/fireworks/models/glm-5p3-flash` | $0.15 | $0.50 | $0.03 | – | – | 1M |
| Fireworks AI | `fireworks_ai/glm-5p3-flash` | $0.15 | $0.50 | $0.03 | – | – | 1M |
| FriendliAI | `friendliai/zai-org/GLM-5.3-Flash` | $0.15 | $0.50 | $0.03 | – | – | 1M |
| Nebius AI Studio | `nebius/zai-org/GLM-5.3-Flash` | $0.15 | $0.50 | – | – | – | 1M |
| Perplexity | `perplexity/perplexity/glm-5.3-flash` | $0.15 | $0.50 | $0.03 | – | – | – |
| Sail | `sail/zai-org/GLM-5.3-Flash` | $0.11 | $0.35 | $0.02 | – | – | 1M |
| Together AI | `together_ai/zai-org/GLM-5.3-Flash` | $0.15 | $0.50 | $0.03 | – | – | 1M |
| Weights & Biases | `wandb/zai-org/GLM-5.3-Flash` | $0.15 | $0.50 | $0.05 | – | – | 1M |

## Cost examples

1,000 requests with 2,000 input and 500 output tokens each:

- Z.ai: $0.55
- Sail: $0.395
- AIHubMix: $0.4225
- Baseten: $0.55

100 long-document requests with 100,000 input and 2,000 output tokens each:

- Z.ai: $1.60
- Sail: $1.17
- AIHubMix: $1.206
- Baseten: $1.60

## Features

Supported: Function calling, Parallel tool calls, Structured output, Image input, Video input, Reasoning, Prompt caching, Web search.

## Use it with LiteLLM

```python
from litellm import completion

response = completion(
    model="zai/glm-5.3-flash",
    messages=[{"role": "user", "content": "Hello!"}],
)
```

## FAQ

### How much does GLM 5.3 Flash cost?

GLM 5.3 Flash costs $0.15 per 1M input tokens and $0.50 per 1M output tokens on Z.ai, with cache reads at $0.03 and cache writes at $0 per 1M tokens. Across 11 providers on LiteLLM, the input price ranges from $0.11 to $0.15.

### What is the context window of GLM 5.3 Flash?

GLM 5.3 Flash has a 1,048,576-token context window and returns up to 128,000 tokens per response.

### Which providers offer GLM 5.3 Flash?

GLM 5.3 Flash is available from 11 providers through LiteLLM: Z.ai, AIHubMix, Baseten, Databricks, Fireworks AI, FriendliAI, Nebius AI Studio, Perplexity, Sail, Together AI and Weights & Biases. The lowest price is on Sail.

### How do I call GLM 5.3 Flash with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="zai/glm-5.3-flash", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/chat/completions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

### What features does GLM 5.3 Flash support?

GLM 5.3 Flash supports function calling, parallel tool calls, structured output, image input, video input, reasoning, prompt caching and web search.

### When did LiteLLM add GLM 5.3 Flash?

GLM 5.3 Flash was added to LiteLLM's model price file on August 27, 2026.

Source: LiteLLM model price file, https://github.com/BerriAI/litellm/blob/main/model_prices_and_context_window.json