GLM-5.3-Flash vs Claude Opus 5.5 (Max, Default Fallback)
Claude Opus 5.5 (Max, Default Fallback) scores 59.1 on the Artificial Analysis Intelligence Index, against 27.8 for GLM-5.3-Flash. GLM-5.3-Flash costs $0.237 per million tokens (3:1 blend), against $8 for Claude Opus 5.5 (Max, Default Fallback). Claude Opus 5.5 (Max, Default Fallback) generates 95 t/s, against 67.9 t/s for GLM-5.3-Flash. Both accept a context of 1M tokens.
Comparison generated from the catalogue data. Add or remove models below to refine it.
2 models compared
- GLM-5.3-Flash
Z.AI
✓ Best published value among measured models. — Data unavailable. These metrics do not establish an overall ranking.
| Metrics | GLM-5.3-Flash Z.AI | Add a model · 2/4 | |
|---|---|---|---|
| Intelligence | 27.8 | Best: 59.1 | |
| Coding | 71.5 | — | |
| Agentic | 50.9 | — | |
| Cyber Index | Best: 49.9% | 28.7% | |
| Speed | 67.9 t/s | Best: 95 t/s | |
| TTFT | Best: 1.47 s | 643 s | |
| Input · $ / 1M tokens | Best: $0.15 | $4×26.7 relative to the lowest price among the compared models | |
| Output · $ / 1M tokens | Best: $0.50 | $20×40 relative to the lowest price among the compared models | |
| Context window | 1M | 1M | |
| Reasoning | Yes | Yes | |
| Open weights | Yes | Yes | |
| Cost / task | Best: $0.583 | $10.04×17.2 relative to the lowest price among the compared models |
Intelligence
- GLM-5.3-Flash
- 27.8
- Claude Opus 5.5 (Max, Default Fallback)
- Best: 59.1
Coding
- GLM-5.3-Flash
- 71.5
- Claude Opus 5.5 (Max, Default Fallback)
- —
Agentic
- GLM-5.3-Flash
- 50.9
- Claude Opus 5.5 (Max, Default Fallback)
- —
Cyber Index
- GLM-5.3-Flash
- Best: 49.9%
- Claude Opus 5.5 (Max, Default Fallback)
- 28.7%
Speed
- GLM-5.3-Flash
- 67.9 t/s
- Claude Opus 5.5 (Max, Default Fallback)
- Best: 95 t/s
TTFT
- GLM-5.3-Flash
- Best: 1.47 s
- Claude Opus 5.5 (Max, Default Fallback)
- 643 s
Input · $ / 1M tokens
- GLM-5.3-Flash
- Best: $0.15
- Claude Opus 5.5 (Max, Default Fallback)
- $4×26.7 relative to the lowest price among the compared models
Output · $ / 1M tokens
- GLM-5.3-Flash
- Best: $0.50
- Claude Opus 5.5 (Max, Default Fallback)
- $20×40 relative to the lowest price among the compared models
Context window
- GLM-5.3-Flash
- 1M
- Claude Opus 5.5 (Max, Default Fallback)
- 1M
Reasoning
- GLM-5.3-Flash
- Yes
- Claude Opus 5.5 (Max, Default Fallback)
- Yes
Open weights
- GLM-5.3-Flash
- Yes
- Claude Opus 5.5 (Max, Default Fallback)
- Yes
Cost / task
- GLM-5.3-Flash
- Best: $0.583
- Claude Opus 5.5 (Max, Default Fallback)
- $10.04×17.2 relative to the lowest price among the compared models
Each reasoning level remains a separate configuration.
Score and cost
Each line joins the reasoning levels of a compared model; the large point marks the configuration in the table. The top-right corner holds the best score for the lowest cost. Select another point to compare that level.
- GLM-5.3-Flash27.8 · $0.583
- Claude Opus 5.5 (Max, Default Fallback)59.1 · $10.04