Claude 3.5 Sonnet vs GLM-4.5: Specs & Benchmark Comparison
| Characteristic | Claude 3.5 Sonnet | GLM-4.5 |
|---|---|---|
| Company | Anthropic | Zhipu AI |
| Release Date | June 21, 2024 | July 27, 2025 |
| Parameters | — | 355B |
| Multimodal | Yes | No |
| Context (input) | 200K | 131K |
| Context (output) | 200K | 98K |
| Input Price / 1M | $3.00 | $0.60 |
| Output Price / 1M | $15.00 | $2.20 |
| Average Score | 0.8 | 0.8 |
| Benchmarks | ||
| GPQA | 0.6 | 0.8 |
| MMLU-Pro | 0.8 | 0.8 |
Visual Benchmark Comparison
Claude 3.5 Sonnet
GLM-4.5
GPQA0.6 vs 0.8
0.6
0.8
MMLU-Pro0.8 vs 0.8
0.8
0.8
Verdict
GLM-4.5 leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude 3.5 Sonnet — 0.8, GLM-4.5 — 0.8.
API Cost
GLM-4.5 is 6.4x cheaper: input $0.60/1M vs $3.00/1M tokens.
Context Window
Claude 3.5 Sonnet supports a larger context: 200K vs 131K tokens.
Recency
GLM-4.5 is newer: released 7/27/2025 vs 6/21/2024.
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Frequently Asked Questions
Which is better for coding — Claude 3.5 Sonnet or GLM-4.5?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Claude 3.5 Sonnet or GLM-4.5?
GLM-4.5 is cheaper for input: $0.60 per 1M tokens vs $3.00.
Which has a larger context window — Claude 3.5 Sonnet or GLM-4.5?
Claude 3.5 Sonnet supports a larger context: 200,000 tokens vs 131,072.
The Claude 3.5 Sonnet and GLM-4.5 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude 3.5 Sonnet or GLM-4.5 page. See also the complete list of AI model comparisons.