FW-GLM-5

Models available for use with Fireworks on Foundry deliver optimized, best-in-class performance on the Fireworks Inference Cloud. Fireworks on Foundry is a Non-Microsoft Product. The following terms apply to a Customer's use of Fireworks on Foundry: When you use Fireworks on Foundry, data is shared between Microsoft and Fireworks AI, Customer Data will be sent outside of Microsoft systems, Customer Data will not be processed pursuant to any Foundry data residency documentation, and different compliance and data handling rules will apply. See Trust Center - Fireworks AI for details. Customers are responsible for evaluating whether data sharing between Microsoft and Fireworks is appropriate for their organization's compliance requirements.

About this model

GLM-5 is Z.ai's latest model targeting complex systems engineering and long-horizon agentic tasks. It uses a Mixture of Experts (MoE) architecture with 744 billion total parameters, activating only 40 billion per token for efficient inference. Scaling up from GLM-4.7 (355B/32B), GLM-5 was pre-trained on 28.5 trillion tokens and integrates DeepSeek Sparse Attention (DSA), which selects only the most relevant tokens for attention to reduce the cost of long-context processing. GLM-5 delivers significant improvements over GLM-4.7 across reasoning, coding, and agentic tasks.

Key model capabilities

• Mixture of Experts architecture: 744B total parameters with 40B activated per token
• DeepSeek Sparse Attention for efficient long-context processing
• Advanced thinking controls: interleaved, preserved, and turn-level thinking via the reasoning_history field
• Multilingual support (English and Chinese)
• Function calling and tool use (file search, code interpreter)
• Streaming support