GLM-5.3-Flash
Summary
GLM-5.3-Flash is an open-weight language model from Zhipu AI (Z.ai), released on 26 Aug 2026. It accepts text, images, video and PDFs and generates text, with a 1M-token context window and up to 131K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.15 per million input tokens and $0.50 per million output tokens (Z.ai API), across 13 providers we track.
Native multimodal GLM model for efficient coding and long-horizon agent tasks
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Zhipu AI (Z.ai) |
|---|---|
| Release date | 26 Aug 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Open weights [Hugging Face] |
| License | mit [Hugging Face] |
| Parameters | 321B [Hugging Face] |
| Context window | 1M (1,000,000 tokens) [models.dev] |
| Max output | 131K tokens [models.dev] |
| Input | Text, images, video and PDFs [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
| Hugging Face | zai-org/GLM-5.3-Flash [Hugging Face] |
GLM-5.3-Flash API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| NVIDIA NIM z-ai/glm-5.3-flash | Free | Free | – | 1M | models.dev, 4 Oct 2026 |
| Z.ai API glm-5.3-flash | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| Cloudflare Workers AI @cf/zai-org/glm-5.3-flash | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| SiliconFlow zai-org/GLM-5.3-Flash | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| Hugging Face Inference Providers zai-org/GLM-5.3-Flash | $0.15 | $0.50 | – | 1M | models.dev, 4 Oct 2026 |
| Nebius AI Studio zai-org/GLM-5.3-Flash | $0.15 | $0.50 | $0.15 | 1M | models.dev, 4 Oct 2026 |
| Together AI zai-org/GLM-5.3-Flash | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| Fireworks AI accounts/fireworks/models/glm-5p3-flash | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| FriendliAI zai-org/GLM-5.3-Flash | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| Fireworks AI accounts/fireworks/routers/glm-flash-latest | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| DeepInfra zai-org/GLM-5.3-Flash | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| Baseten zai-org/GLM-5.3-Flash | $0.15 | $0.50 | – | 1M | models.dev, 4 Oct 2026 |
| OpenRouter z-ai/glm-5.3-flash | $0.15 | $0.50 | $0.03 | 1M | OpenRouter, 4 Oct 2026 |
| Vercel AI Gateway zai/glm-5.3-flash | $0.15 | $0.50 | $0.03 | 1M | models.dev, 4 Oct 2026 |
| Z.ai API glm-5.3-flashx | $0.37 | $1.25 | $0.07 | 1M | models.dev, 4 Oct 2026 |
| Vercel AI Gateway zai/glm-5.3-flashx | $0.37 | $1.25 | $0.07 | 1M | models.dev, 4 Oct 2026 |
Frequently asked questions
What is the context window of GLM-5.3-Flash?
GLM-5.3-Flash has a context window of 1,000,000 tokens (1M) and can generate up to 131,072 tokens in a single response, according to models.dev.
How much does the GLM-5.3-Flash API cost?
Through Z.ai API, GLM-5.3-Flash costs $0.15 per million input tokens and $0.50 per million output tokens. Prices last verified 4 Oct 2026.
Is GLM-5.3-Flash open source?
GLM-5.3-Flash is an open-weight model: its weights are published on Hugging Face as zai-org/GLM-5.3-Flash under the mit license. Check the license terms before commercial use.
When was GLM-5.3-Flash released?
Zhipu AI (Z.ai) released GLM-5.3-Flash on 26 Aug 2026, according to models.dev.
Which providers offer GLM-5.3-Flash?
We track GLM-5.3-Flash on 13 providers: NVIDIA NIM, Z.ai API, Cloudflare Workers AI, SiliconFlow, Hugging Face Inference Providers, Nebius AI Studio, Together AI, Fireworks AI, FriendliAI, DeepInfra, Baseten, OpenRouter, Vercel AI Gateway.
Change history
No changes detected since we started tracking this model. We re-check every source daily.
Sources
- https://openrouter.ai/z-ai/glm-5.3-flash
- https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3-flash.toml
- https://huggingface.co/zai-org/GLM-5.3-Flash
- https://github.com/sst/models.dev/blob/dev/providers/nvidia/models/z-ai/glm-5.3-flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/cloudflare-workers-ai/models/@cf/zai-org/glm-5.3-flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/siliconflow/models/zai-org/GLM-5.3-Flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/huggingface/models/zai-org/GLM-5.3-Flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/nebius/models/zai-org/GLM-5.3-Flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/togetherai/models/zai-org/GLM-5.3-Flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/fireworks-ai/models/accounts/fireworks/models/glm-5p3-flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/friendli/models/zai-org/GLM-5.3-Flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/fireworks-ai/models/accounts/fireworks/routers/glm-flash-latest.toml
- https://github.com/sst/models.dev/blob/dev/providers/deepinfra/models/zai-org/GLM-5.3-Flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/baseten/models/zai-org/GLM-5.3-Flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/zai/glm-5.3-flash.toml
- https://github.com/sst/models.dev/blob/dev/providers/zai/models/glm-5.3-flashx.toml
- https://github.com/sst/models.dev/blob/dev/providers/vercel/models/zai/glm-5.3-flashx.toml