Z.ai
GLM-5.3
Z.ai's open-weight flagship with a 1M-token context window for long-horizon work.
Our editorial assessment, based on the public sources listed below. Last reviewed .
- Overall rank
- #14
- Tier
- S
- Score
- 86.3
- Main category
- Overall
Strengths
- 1M-token context window
- Open-source weights for self-hosting
- Competitive reasoning and coding at low cost
Considerations
- Newer release with a thinner independent benchmark track record.
Price
Open weights (GLM-5.3 License); API $1.40 input / $4.40 output per 1M tokens via Z.ai
Shown for reference — price is not part of the score.
Score breakdown
- Performance
- 88.0
- 55% of score
- Reputation
- 83.0
- 35% of score
- Recency
- 88.0
- 10% of score
The overall score combines these sub-scores using the weights shown. How we score →
Verification status
Each field carries its own re-verification date. Amber means older than 90 days — treat those figures as stale until re-checked.
- Pricing
- Benchmark
- Reputation
- Feature list
Checked against the sources listed below.
Sources
- Artificial Analysis — GLM-5.3 (opens in a new tab)Accessed:
- Mistral Models Overview — Z.ai GLM 5.3 (opens in a new tab)Accessed:
- Mistral Model Selection Guide — GLM 5.3 (opens in a new tab)Accessed:
- Artificial Analysis — Z.ai models (opens in a new tab)Accessed:
- Mistral Docs — Models (opens in a new tab)Accessed:
Show 5 more sources
- Perplexity Agent API — model list and pricing (opens in a new tab)Accessed:
- 15 Frontier AI Models Worth Watching 2026 (opens in a new tab)Accessed:
- Mistral Docs — Open-weight models (opens in a new tab)Accessed:
- Artificial Analysis — Model comparison (Intelligence Index) (opens in a new tab)Accessed:
- Best AI Models in 2026: Ranked by Benchmark and Cost (ofox.ai) (opens in a new tab)Accessed:
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