Model Comparison

Claude 3 Opus vs GLM-4.5

GLM-4.5 significantly outperforms across most benchmarks. GLM-4.5 is 42.9x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude 3 Opus outperforms in 0 benchmarks, while GLM-4.5 is better at 2 benchmarks (GPQA, MMLU-Pro).

GLM-4.5 significantly outperforms across most benchmarks.

Tue May 12 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GLM-4.5 costs less

For input processing, Claude 3 Opus ($15.00/1M tokens) is 37.5x more expensive than GLM-4.5 ($0.40/1M tokens).

For output processing, Claude 3 Opus ($75.00/1M tokens) is 46.9x more expensive than GLM-4.5 ($1.60/1M tokens).

In conclusion, Claude 3 Opus is more expensive than GLM-4.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue May 12 2026 • llm-stats.com
Anthropic
Claude 3 Opus
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
Zhipu AI
GLM-4.5
Input tokens$0.40
Output tokens$1.60
Best providerDeepinfra
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude 3 Opus accepts 200,000 input tokens compared to GLM-4.5's 131,072 tokens. Claude 3 Opus can generate longer responses up to 200,000 tokens, while GLM-4.5 is limited to 131,072 tokens.

Anthropic
Claude 3 Opus
Input200,000 tokens
Output200,000 tokens
Zhipu AI
GLM-4.5
Input131,072 tokens
Output131,072 tokens
Tue May 12 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3 Opus supports multimodal inputs, whereas GLM-4.5 does not.

Claude 3 Opus can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3 Opus

Text
Images
Audio
Video

GLM-4.5

Text
Images
Audio
Video

License

Usage and distribution terms

Claude 3 Opus is licensed under a proprietary license, while GLM-4.5 uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Claude 3 Opus

Proprietary

Closed source

GLM-4.5

MIT

Open weights

Release Timeline

When each model was launched

Claude 3 Opus was released on 2024-02-29, while GLM-4.5 was released on 2025-07-28.

GLM-4.5 is 17 months newer than Claude 3 Opus.

Claude 3 Opus

Feb 29, 2024

2.2 years ago

GLM-4.5

Jul 28, 2025

9 months ago

1.4yr newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude 3 Opus is available from Anthropic, Bedrock, Google. GLM-4.5 is available from DeepInfra, Fireworks, Novita.

Claude 3 Opus

anthropic logo
Anthropic
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
google logo
Google
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M

GLM-4.5

deepinfra logo
Deepinfra
Input Price:Input: $0.40/1MOutput Price:Output: $1.60/1M
fireworks logo
Fireworks
Input Price:Input: $0.55/1MOutput Price:Output: $2.19/1M
novita logo
Novita
Input Price:Input: $0.60/1MOutput Price:Output: $2.20/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Supports multimodal inputs
Zhipu AI
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher GPQA score (79.1% vs 50.4%)
Higher MMLU-Pro score (84.6% vs 68.5%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3 Opus
Zhipu AI
GLM-4.5

FAQ

Common questions about Claude 3 Opus vs GLM-4.5.

Which is better, Claude 3 Opus or GLM-4.5?

GLM-4.5 significantly outperforms across most benchmarks. Claude 3 Opus is made by Anthropic and GLM-4.5 is made by Zhipu AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3 Opus compare to GLM-4.5 in benchmarks?

Claude 3 Opus scores ARC-C: 96.4%, HellaSwag: 95.4%, GSM8k: 95.0%, MGSM: 90.7%, BIG-Bench Hard: 86.8%. GLM-4.5 scores MATH-500: 98.2%, AIME 2024: 91.0%, MMLU-Pro: 84.6%, TAU-bench Retail: 79.7%, GPQA: 79.1%.

Is Claude 3 Opus cheaper than GLM-4.5?

GLM-4.5 is 37.5x cheaper for input tokens. Claude 3 Opus costs $15.00/M input and $75.00/M output via anthropic. GLM-4.5 costs $0.40/M input and $1.60/M output via deepinfra.

What are the context window sizes for Claude 3 Opus and GLM-4.5?

Claude 3 Opus supports 200K tokens and GLM-4.5 supports 131K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude 3 Opus and GLM-4.5?

Key differences include context window (200K vs 131K), input pricing ($15.00 vs $0.40/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3 Opus and GLM-4.5?

Claude 3 Opus is developed by Anthropic and GLM-4.5 is developed by Zhipu AI.