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Z.ai: GLM 5.3
Z AItext8.8 / 10 Overall Rating
GLM 5.3 is a reasoning model developed by Z.ai built for software engineering and long-horizon agentic workloads. It features a 1M-token context window alongside an exceptionally high 131,072 max output token ceiling. Priced at $1.40/1M input and $4.40/1M output, it offers a cost-effective alternative to GPT-4o and Claude 3.5 Sonnet for long-context text processing.
Context Window
1049K
Knowledge Cutoff
2025
Max Output
16K
License
Proprietary
Where it Excels (Pros)
- 1M token input context window
- Massive 128K max output length
- Cheaper input/output than GPT-4o
Limitations (Cons)
- Text-only with no vision support
- Unproven real-world benchmark performance
Benchmark Breakdown
Reasoning (MMLU)82%
Coding (HumanEval)78%
Mathematics (MATH)76%
Long-Context Retrieval95%
Pricing Matrix
Input cost / 1M tokens$1.40
Output cost / 1M tokens$4.40
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