Claude 3 Opus vs GLM-4.5: Specs & Benchmark Comparison
| Characteristic | Claude 3 Opus | GLM-4.5 |
|---|---|---|
| Company | Anthropic | Zhipu AI |
| Release Date | February 29, 2024 | July 27, 2025 |
| Parameters | — | 355B |
| Multimodal | Yes | No |
| Context (input) | 200K | 131K |
| Context (output) | 200K | 98K |
| Input Price / 1M | $15.00 | $0.60 |
| Output Price / 1M | $75.00 | $2.20 |
| Average Score | 0.8 | 0.8 |
| Benchmarks | ||
| GPQA | 0.5 | 0.8 |
| MMLU-Pro | 0.7 | 0.8 |
Visual Benchmark Comparison
Claude 3 Opus
GLM-4.5
GPQA0.5 vs 0.8
0.5
0.8
MMLU-Pro0.7 vs 0.8
0.7
0.8
Verdict
GLM-4.5 leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: Claude 3 Opus — 0.8, GLM-4.5 — 0.8.
API Cost
GLM-4.5 is 32.1x cheaper: input $0.60/1M vs $15.00/1M tokens.
Context Window
Claude 3 Opus supports a larger context: 200K vs 131K tokens.
Recency
GLM-4.5 is newer: released 7/27/2025 vs 2/29/2024.
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Frequently Asked Questions
Which is better for coding — Claude 3 Opus 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 Opus or GLM-4.5?
GLM-4.5 is cheaper for input: $0.60 per 1M tokens vs $15.00.
Which has a larger context window — Claude 3 Opus or GLM-4.5?
Claude 3 Opus supports a larger context: 200,000 tokens vs 131,072.
The Claude 3 Opus 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 Opus or GLM-4.5 page. See also the complete list of AI model comparisons.