Model tracker / Z.ai
GLM-5.3 Flash
GLM-5.3 Flash is a fast open-weight model from Z.ai, released 26 August 2026. At Z.ai it costs $0.15 per million input tokens and $0.50 per million output tokens, with a 1M-token context window. 8 providers serve it; the cheapest is Baseten at $0.15 input and $0.50 output.
- Made by
- Z.ai
- Released
- 2026-08-26
- Status
- Generally available
- Tier
- Fast
- Weights
- Open
- Context window
- 1,000,000 tokens
- Max output
- 128,000 tokens
- Input
- text, image, video
- API id
glm-5.3-flash
GLM-5.3 Flash price at 8 providers
US dollars per million tokens. Blended is 3 input tokens for every output token, one number to compare on. The cheapest blended price is highlighted.
| Provider | Input | Output | Cached input | Blended | Batch | Checked |
|---|---|---|---|---|---|---|
| Baseten · zai-org/GLM-5.3-Flash | $0.15 | $0.50 | $0.03 | $0.237 | – | 2026-10-14 |
| Cloudflare · @cf/zai-org/glm-5.3-flash | $0.15 | $0.50 | $0.03 | $0.237 | – | 2026-10-14 |
| Fireworks AI · accounts/fireworks/models/glm-5p3-flash | $0.15 | $0.50 | $0.03 | $0.237 | 50% off | 2026-10-14 |
| Nebius Group N.V. · zai-org/GLM-5.3-Flash | $0.15 | $0.50 | – | $0.237 | – | 2026-10-14 |
| Novita AI · zai-org/glm-5.3-flash | $0.15 | $0.50 | $0.03 | $0.237 | – | 2026-10-14 |
| Together AI · zai-org/GLM-5.3-Flash | $0.15 | $0.50 | $0.03 | $0.237 | – | 2026-10-14 |
| Z.ai · maker | $0.15 | $0.50 | $0.03 | $0.237 | – | 2026-10-14 |
| Modal Labs · zai-org/GLM-5.3-Flash | $0.45 | $1.50 | $0.09 | $0.713 | – | 2026-10-14 |
- Cloudflare: Needs Workers Paid or AI Gateway credits. Billed in Neurons at $0.011 per 1,000; 10,000 Neurons a day free.
- Fireworks AI: US-hosted variant: $0.225 / $0.75.
- Nebius Group N.V.: No cached-input or batch price published.
- Z.ai: Cached input storage free for a limited time.
- Modal Labs: Modal Shared Endpoint, billed per token from us-west; plan credits can't be used for Shared Endpoint usage.
GLM-5.3 Flash benchmarks
| Benchmark | Score | What it measures | Reported by |
|---|---|---|---|
| LMArena text score | 1473 | Elo-style score from people voting between answers | Independent |
Scores reported by a model's maker aren't independently checked.
Models like GLM-5.3 Flash
Other fast models closest in price, at each maker's own price or the cheapest provider.
| Model | Input | Output | Context | Weights |
|---|---|---|---|---|
| GLM-5.3 Flash | $0.15 | $0.50 | 1M | Open |
| Qwen3.8 Flash Alibaba | $0.15 | $0.47 | 1M | Closed |
| Gemma 4 26B A4B Google | $0.15 | $0.60 | 262K | Open |
| Mistral Small 4 Mistral AI | $0.15 | $0.60 | 256K | Open |
| Gemma 4 31B Google | $0.14 | $0.40 | 256K | Open |
| Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | Closed |
Compare them all in the model tracker →
GLM-5.3 Flash FAQ
How much does GLM-5.3 Flash cost?
GLM-5.3 Flash costs $0.15 per million input tokens and $0.50 per million output tokens at Z.ai, and $0.03 per million cached input tokens. Prices are list prices in US dollars, last checked 14 October 2026.
What is GLM-5.3 Flash's context window?
GLM-5.3 Flash takes up to 1,000,000 tokens in one request and writes up to 128,000 tokens in one response.
Is GLM-5.3 Flash open weight?
Yes. Z.ai publishes the weights, so you can run GLM-5.3 Flash yourself or at any host that serves it.
Where can I use GLM-5.3 Flash?
GLM-5.3 Flash is available from Baseten, Cloudflare, Fireworks AI, Nebius Group N.V., Novita AI, Together AI, Z.ai and Modal Labs. At Z.ai, call it as glm-5.3-flash.