Head to Head

deepseek-ai/DeepSeek-V4-Pro vs zai-org/GLM-5.1

Pricing, experience, and what the community actually says.

deepseek-ai/DeepSeek-V4-Pro

deepseek-ai/DeepSeek-V4-Pro

Starting at

Free

Refund

Pay-as-you-go model with no subscription refunds; unused credits may expire per platform terms.

Try Free →

★ Our Pick

zai-org/GLM-5.1

zai-org/GLM-5.1

Starting at

$1.40 / 1M input tokens

Refund

Pay-as-you-go model; no refunds on consumed tokens. Unused credits may expire per provider terms.

Try Free →

Our Take

deepseek-ai/DeepSeek-V4-Prodeepseek-ai/DeepSeek-V4-Pro

“Yes, for developers, researchers, and businesses handling high-volume text or code tasks where cost efficiency and multilingual support are priorities. Users requiring enterprise SLAs, advanced media generation, or strict Western data compliance should evaluate alternatives.”

DeepSeek-V4-Pro delivers strong reasoning and coding capabilities at a fraction of the cost of major Western competitors, making it a practical choice for developers and researchers prioritizing budget efficiency and Asian language support.

zai-org/GLM-5.1zai-org/GLM-5.1

“Worth it for developers and enterprises needing a highly capable, commercially permissive model for software engineering and complex multi-step agents, provided latency and token costs fit the budget.”

GLM-5.1 delivers frontier-level reasoning and coding performance under an open MIT license, but its high token cost and slower inference speed make it best suited for specialized, high-value tasks rather than high-volume, low-latency applications.

Pros & Cons

deepseek-ai/DeepSeek-V4-Pro

✓Highly competitive API pricing
✓Transparent reasoning outputs
✓Strong coding and mathematical capabilities
✓Free web/app tier
✓Excellent multilingual support for Asian languages
✗No built-in image/video generation or voice chat
✗Limited enterprise support and SLAs
✗Response quality may vary for creative Western language tasks
✗Data privacy and compliance considerations for some regions

zai-org/GLM-5.1

✓Strong multi-step reasoning and coding performance
✓Commercially permissive MIT license
✓Large 200k context window
✓Open-weight with transparent architecture
✓High benchmark scores (Intelligence Index: 51)
✗Higher token pricing compared to many open models
✗Slower inference speed (~44 t/s)
✗High verbosity increases output costs
✗Text-only input/output requires separate vision models
✗Heavy hardware requirements for self-hosting

Full Breakdown

Category
deepseek-ai/DeepSeek-V4-Prodeepseek-ai/DeepSeek-V4-Pro
zai-org/GLM-5.1zai-org/GLM-5.1

Overall Rating

4.1 / 5
★4.2 / 5

Starting Price

Free
$1.40 / 1M input tokens

Learning Curve

Low for basic chat usage; moderate for API integration and prompt optimization to leverage its reasoning modes effectively.
Moderate. Requires familiarity with OpenAI-compatible SDKs, prompt engineering for reasoning modes, and token budget management due to verbosity.

Best Suited For

Developers, academic researchers, cost-sensitive startups, and teams needing strong Mandarin/Japanese/Korean language processing or transparent chain-of-thought reasoning.
Software engineering teams, AI agent developers, and researchers requiring strong multi-step reasoning and open-weight deployment flexibility.

Support Quality

Relies primarily on comprehensive documentation and community forums. Direct enterprise support or SLAs are limited compared to major Western providers.
Standard developer documentation and community support via GitHub and Hugging Face. No dedicated enterprise SLA is publicly advertised for the open-weight version.

Hidden Costs

No subscription fees, but high-volume API usage scales linearly. Self-hosting requires separate GPU infrastructure costs.
High verbosity can significantly increase output token consumption. Self-hosting requires substantial GPU infrastructure due to the 754B parameter size.

Refund Policy

Pay-as-you-go model with no subscription refunds; unused credits may expire per platform terms.
Pay-as-you-go model; no refunds on consumed tokens. Unused credits may expire per provider terms.

Platforms

Web, iOS, Android, API
Cloud API, Self-hosted (GPU), Hugging Face, ModelScope

Features

Watermark on Free Plan

✗ No
✗ No

Mobile App

✓ Yes
✗ No

API Access

✓ Yes
✓ Yes
deepseek-ai/DeepSeek-V4-Pro Review →Try Free →
zai-org/GLM-5.1 Review →Try Free →