Model Comparison

Claude 3.5 Sonnet vs GLM-4.5

GLM-4.5 significantly outperforms across most benchmarks. GLM-4.5 is 8.6x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Claude 3.5 Sonnet outperforms in 0 benchmarks, while GLM-4.5 is better at 5 benchmarks (GPQA, MMLU-Pro, SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail).

GLM-4.5 significantly outperforms across most benchmarks.

Tue Apr 21 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 3.5 Sonnet ($3.00/1M tokens) is 7.5x more expensive than GLM-4.5 ($0.40/1M tokens).

For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 9.4x more expensive than GLM-4.5 ($1.60/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than GLM-4.5.*

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

Lowest available price from all providers
Tue Apr 21 2026 • llm-stats.com
Anthropic
Claude 3.5 Sonnet
Input tokens$3.00
Output tokens$15.00
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 3.5 Sonnet accepts 200,000 input tokens compared to GLM-4.5's 131,072 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while GLM-4.5 is limited to 131,072 tokens.

Anthropic
Claude 3.5 Sonnet
Input200,000 tokens
Output200,000 tokens
Zhipu AI
GLM-4.5
Input131,072 tokens
Output131,072 tokens
Tue Apr 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3.5 Sonnet supports multimodal inputs, whereas GLM-4.5 does not.

Claude 3.5 Sonnet can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3.5 Sonnet

Text
Images
Audio
Video

GLM-4.5

Text
Images
Audio
Video

License

Usage and distribution terms

Claude 3.5 Sonnet 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 3.5 Sonnet

Proprietary

Closed source

GLM-4.5

MIT

Open weights

Release Timeline

When each model was launched

Claude 3.5 Sonnet was released on 2024-10-22, while GLM-4.5 was released on 2025-07-28.

GLM-4.5 is 9 months newer than Claude 3.5 Sonnet.

Claude 3.5 Sonnet

Oct 22, 2024

1.5 years ago

GLM-4.5

Jul 28, 2025

8 months ago

9mo 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 3.5 Sonnet is available from Anthropic, Bedrock, Google. GLM-4.5 is available from DeepInfra, Fireworks, Novita.

Claude 3.5 Sonnet

anthropic logo
Anthropic
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
google logo
Google
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

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

Notice missing or incorrect data?Start an Issue discussion→

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 67.2%)
Higher MMLU-Pro score (84.6% vs 77.6%)
Higher SWE-Bench Verified score (64.2% vs 49.0%)
Higher TAU-bench Airline score (60.4% vs 46.0%)
Higher TAU-bench Retail score (79.7% vs 69.2%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Sonnet
Zhipu AI
GLM-4.5

FAQ

Common questions about Claude 3.5 Sonnet vs GLM-4.5

GLM-4.5 significantly outperforms across most benchmarks. Claude 3.5 Sonnet 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.
Claude 3.5 Sonnet scores GSM8k: 96.4%, DocVQA: 95.2%, AI2D: 94.7%, HumanEval: 93.7%, BIG-Bench Hard: 93.1%. GLM-4.5 scores MATH-500: 98.2%, AIME 2024: 91.0%, MMLU-Pro: 84.6%, TAU-bench Retail: 79.7%, GPQA: 79.1%.
GLM-4.5 is 7.5x cheaper for input tokens. Claude 3.5 Sonnet costs $3.00/M input and $15.00/M output via anthropic. GLM-4.5 costs $0.40/M input and $1.60/M output via deepinfra.
Claude 3.5 Sonnet 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.
Key differences include context window (200K vs 131K), input pricing ($3.00 vs $0.40/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.
Claude 3.5 Sonnet is developed by Anthropic and GLM-4.5 is developed by Zhipu AI.