GLM-5 Review: Zhipu Flagship for Chinese + English

[chawkian]

GLM-5 Review: Zhipu's Flagship Model for Chinese + English Workloads

GLM-5 from Zhipu AI (formerly Z.ai) is one of the strongest Chinese-developed LLMs available through an OpenAI-compatible API. Its standout feature: Chinese language performance that rivals or exceeds GPT-4o, at roughly 1/12th the cost.

Available on AIWave with the model name glm-4-plus.

Pricing

	GLM-5	GPT-4o	Claude Sonnet 4	DeepSeek V4 Pro
Input (USD/1M)	$0.20	$2.50	$3.00	$0.42
Output (USD/1M)	$0.60	$10.00	$15.00	$0.84
Context	128K	128K	200K	1M

Prices from AIWave pricing. GPT-4o/Claude from official sources.

GLM-5 is the cheapest mainstream model that still delivers competitive quality. It costs 60% less than DeepSeek V4 Pro on output tokens.

Performance

Coding

GLM-5 handles standard coding tasks well — function writing, refactoring, bug fixes. It scores lower than DeepSeek V4 Pro on HumanEval but produces readable, correct code for most practical scenarios.

• Python, JavaScript, TypeScript: Reliable output
• Complex multi-file refactoring: Adequate within 128K context
• Code explanation: Strong in both English and Chinese

Chinese Language

This is where GLM-5 separates from the pack. On Chinese-language tasks:

• Writing and editing: Near-native quality, better than GPT-4o
• Cultural context: Understands Chinese business, legal, and technical terminology
• Mixed Chinese-English: Handles code-switching naturally

If your product or content serves Chinese users, GLM-5 produces noticeably better Chinese output than any non-Chinese model.

English Language

Solid but not exceptional. For English-only workloads, DeepSeek V4 Pro delivers better reasoning at a moderate price premium. GLM-5's English is comparable to GPT-3.5 Turbo — good enough for most tasks, not the best available.

Cost Analysis

200 API calls per day, 4K input + 2K output tokens, 22 working days per month.

Model	Monthly Cost
GLM-5	$9
DeepSeek V4 Flash	$4
DeepSeek V4 Pro	$13
GPT-4o	$154
Claude Sonnet 4	$185

Formula: (4,000/1M x input + 2,000/1M x output) x 200 x 22.

GLM-5 costs roughly the same as a Spotify subscription per month for heavy daily use.

When to Use GLM-5

Best fit:

• Chinese-language content generation and editing
• Chatbots serving Chinese-speaking users
• Cost-sensitive applications where quality still matters
• Mixed Chinese-English workloads
• Bulk content processing (summaries, translations, classification)

Not ideal:

• Complex multi-step coding (DeepSeek V4 Pro is better)
• Large codebase analysis (DeepSeek V4 Pro's 1M context wins)
• Tasks requiring cutting-edge English reasoning

API Usage

from openai import OpenAI

client = OpenAI(
    api_key="***",
    base_url="https://aiwave.live/v1"
)

response = client.chat.completions.create(
    model="glm-4-plus",
    messages=[
        {"role": "user", "content": "用中文写一段产品介绍"}
    ]
)
print(response.choices[0].message.content)

GLM-5 is available through AIWave alongside 50+ other models with a single API key. No Chinese payment method or phone number required. The $1 free credit covers roughly 550 GLM-5 queries — enough to evaluate for your use case.

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AIWave - 50+ models, one key. $1 free.

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Resources

• AIWave developer blog
• AIWave Python SDK