Head to Head

zai-org/GLM-5.1 vs Claude 4

Pricing, experience, and what the community actually says.

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.

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★ Our Pick

Claude 4

Claude 4

Starting at

$20/mo

Refund

Pro-rated refund available in specific regions

Try Free →

Our Take

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.

Claude 4Claude 4

“Yes for professionals. The $20/month Pro tier is justified by the reliability of its reasoning and the utility of the 1M token context window.”

Claude 4 is a precision tool that prioritizes logic and instruction-following over conversational flair. While it excels at handling massive datasets and complex codebases, its safety guardrails can still feel overly restrictive for certain creative or edge-case tasks.

Pros & Cons

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

Claude 4

✓Industry-leading 1M token context window
✓High nuance in technical and creative writing
✓Minimal hallucination on dense document analysis
✓Artifacts UI makes code and UI design seamless
✗Safety filters can be overly sensitive
✗Lacks the 'search' integration depth of competitors
✗Clinical personality may feel 'dry' to some users

Full Breakdown

Category
zai-org/GLM-5.1zai-org/GLM-5.1
Claude 4Claude 4

Overall Rating

4.2 / 5
★4.8 / 5

Starting Price

$1.40 / 1M input tokens
$20/mo

Learning Curve

Moderate. Requires familiarity with OpenAI-compatible SDKs, prompt engineering for reasoning modes, and token budget management due to verbosity.
Low. The chat-based interaction is intuitive, though getting the most out of its 'Computer Use' features requires more structured prompting.

Best Suited For

Software engineering teams, AI agent developers, and researchers requiring strong multi-step reasoning and open-weight deployment flexibility.
Software engineers, researchers, and legal professionals who require high-density information processing and low hallucination rates.

Support Quality

Standard developer documentation and community support via GitHub and Hugging Face. No dedicated enterprise SLA is publicly advertised for the open-weight version.
Responsive for paid tiers. Documentation is comprehensive, though the community forums are the primary source for troubleshooting 'Computer Use' API bugs.

Hidden Costs

High verbosity can significantly increase output token consumption. Self-hosting requires substantial GPU infrastructure due to the 754B parameter size.
None for standard users. API users should monitor token costs closely as the 1M context window makes it easy to burn through credits with large system prompts.

Refund Policy

Pay-as-you-go model; no refunds on consumed tokens. Unused credits may expire per provider terms.
Pro-rated refund available in specific regions

Platforms

Cloud API, Self-hosted (GPU), Hugging Face, ModelScope
Web-based, iOS, Android, Desktop App (macOS/Windows)

Features

Watermark on Free Plan

✗ No
✗ No

Mobile App

✗ No
✓ Yes

API Access

✓ Yes
✓ Yes
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