Model Comparison
GLM-5.3 (max)
vs. Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)
Comparing 2 AI models · 0 benchmarks · Z AI, Anthropic
Recommended Pick
Z GLM-5.3 (max)4 metric winsStrongest on: Value, Input price, Output price
Best Value
GLM-5.3 (max)
100.0 value score
44.8 reasoning / $2.15/1M
Lowest Price
GLM-5.3 (max)
$1.40/1M input price
Best Reasoning
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)
57.6 reasoning score
Blends available reasoning benchmarks
Best for Coding
GLM-5.3 (max)
74.8 coding index
Differences That Matter
Best value
GLM-5.3 (max) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
GLM-5.3 (max) is 2.9x cheaper on input tokens than Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback).
Reasoning gap
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) leads GLM-5.3 (max) by 12.8 points on reasoning.
Top-pick rationale
GLM-5.3 (max) wins 4 measurable categories, including Value, Input price, Output price, Blended price.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GLM-5.3 (max)
Z AI
TTFT
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Time
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tok/s
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Tokens
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Cost
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Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)
Anthropic
TTFT
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Time
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tok/s
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Tokens
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Cost
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Which answer was more useful?
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Full Comparison
| Metric | Top Pick Z GLM-5.3 (max) | An Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $1.40/1M | $4.00/1M |
| Output Cost | $4.40/1M | $20.00/1M |
| Blended (3:1) | $2.15/1M | $8.00/1M |
| Specifications | ||
| Organization | Z AI | Anthropic |
| Release Date | Aug 18, 2026 | Sep 22, 2026 |
| Performance & Speed | ||
| Throughput | 60.7 tok/s | — |
| TTFT | 3410ms | — |
| Latency | 36360ms | — |
| Composite Indices | ||
| Value Score | 100.0 | 34.6 |
| Reasoning Score | 44.8 | 57.6 |
| Intelligence | 44.8 | 57.6 |
| Coding | 74.8 | — |
Key Takeaways
GLM-5.3 (max) offers the best value at $1.40/1M,making it ideal for high-volume applications and cost-conscious projects.
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) has the strongest reasoning profile with a 57.6 reasoning score,combining the available reasoning-heavy benchmarks.
GLM-5.3 (max) reaches a 74.8 coding index,making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
GLM-5.3 (max)
- Cost-sensitive applications
- High-volume processing
- Code generation
- Software development
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)
- Complex reasoning tasks
- Research & analysis
