GLM-5.3-Flash is a 320-billion-parameter model from Z AI that scores 57 on the Artificial Analysis Intelligence Index while costing about 7.5x less than the larger GLM-5.3. It is built for developers and businesses that need a long-context, low-cost model for agents, retrieval, and high-volume API workloads.
Core Features
- 320B-parameter transformer with a 1-million-token context window for long documents and agent memory.
- Scores 57 on the Artificial Analysis Intelligence Index, reaching the Pareto frontier for intelligence versus cost.
- Priced at roughly $0.09 per task via Z AI's API, about 7.5x cheaper than GLM-5.3.
- Strong tool-calling and structured-output support for agentic workflows and function use.
- Available through Z AI's API and compatible OpenAI-style endpoints for easy migration.
Use Cases
- Startups building agents that must hold long conversation or document context on a budget.
- Enterprises running high-volume retrieval-augmented generation without premium model bills.
- Developers prototyping before upgrading to larger frontier models for harder tasks.
Pricing
GLM-5.3-Flash is billed per token through Z AI's API at about $0.09 per task, with a 1-million-token context window. A free tier is available for evaluation, and enterprise volume pricing is offered for large deployments.
Our Take
Best for cost-sensitive production agents that need long context without a premium bill. The trade-off is raw capability — GLM-5.3-Flash trails the top frontier models on the hardest reasoning, so keep it for throughput, not frontier quality. See the AI model directory.
