GLM-5.3
GLM-5.3 is worth evaluating for coding, rag, and agents when its provider route and context window match the workload.
Use it for
- Teams evaluating coding, rag, and agents
- Workloads that can use a 1m context window
- Buyers comparing 1 tracked provider route
Do not use it for
- Vision or document-understanding workloads
- Family
- GLM-5
- Released
- 2026-08-14
- Context
- 1m
- Max output
- 131,072
- Specialization
- coding
- Openness
- Proprietary
- License
- ProprietaryCommercial use: conditional
- Weights
- Not released
- Code
- Unknown
- Training
- Fine-tuned
Cheapest of 1 route · Z.ai · cache read $0.260
About
GLM-5.3 is Z.ai's August 2026 coding-first post-training release on the same GLM-5.2 base model, focused on complex software engineering, long-horizon agentic coding, and emergent cybersecurity evaluation. It is available through the GLM Coding Plan and Z.ai API; open weights are scheduled after safety hardening. Official API model ID: glm-5.3.
Top use-case fit: coding, agents, and build tasks
Coding
Included by capability and metadata signals in the decision map.
RAG
Included by capability and metadata signals in the decision map.
Agents
Included by capability and metadata signals in the decision map.
Provider price ladder
Compare API pricing across 1 providers for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Cache | Route |
|---|---|---|---|---|
| Z.ai | $1.40 | $4.40 | read $0.260 | Serverless |
Capabilities
Benchmark peer barsfor Coding
No task-mapped benchmark peers are available for this model yet.
Benchmark scores(2)
| Benchmark | Score | Version | Evaluation | Source |
|---|---|---|---|---|
| DeepSWE 1.1 | 66.9 | DeepSWE v1.1Observed 2026-08-14 | — | Source |
| Agents' Last Exam | 28.5 | Agents' Last Exam (CLI)Observed 2026-08-14 | — | Source |
Migration checks
No linked migration route is available for this model yet.
API versions
glm-5.3Cheapest of 1 route · Z.ai · cache read $0.260