GLM-5 vs Grok-4.20 Beta Reasoning Comparison

Comparing GLM-5 and Grok-4.20 Beta Reasoning across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GLM-5 and Grok-4.20 Beta Reasoning don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GLM-5 costs less

For input processing, GLM-5 ($1.00/1M tokens) is 2.0x cheaper than Grok-4.20 Beta Reasoning ($2.00/1M tokens).

For output processing, GLM-5 ($3.20/1M tokens) is 1.9x cheaper than Grok-4.20 Beta Reasoning ($6.00/1M tokens).

In conclusion, Grok-4.20 Beta Reasoning is more expensive than GLM-5.*

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

Lowest available price from all providers

Tue Mar 17 2026 • llm-stats.com

GLM-5

Input tokens$1.00

Output tokens$3.20

Best providerUnknown Organization

Grok-4.20 Beta Reasoning

Input tokens$2.00

Output tokens$6.00

Best providerxAI

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Context Window

Maximum input and output token capacity

Grok-4.20 Beta Reasoning accepts 2,000,000 input tokens compared to GLM-5's 200,000 tokens. GLM-5 can generate longer responses up to 128,000 tokens, while Grok-4.20 Beta Reasoning is limited to 30,000 tokens.

GLM-5

Input200,000 tokens

Output128,000 tokens

Grok-4.20 Beta Reasoning

Input2,000,000 tokens

Output30,000 tokens

Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4.20 Beta Reasoning supports multimodal inputs, whereas GLM-5 does not.

Grok-4.20 Beta Reasoning can handle both text and other forms of data like images, making it suitable for multimodal applications.

GLM-5

Text

Images

Audio

Video

Grok-4.20 Beta Reasoning

Text

Images

Audio

Video

License

Usage and distribution terms

GLM-5 is licensed under MIT, while Grok-4.20 Beta Reasoning uses a proprietary license.

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

GLM-5

MIT

Open weights

Grok-4.20 Beta Reasoning

Proprietary

Closed source

Release Timeline

When each model was launched

GLM-5 was released on 2026-02-11, while Grok-4.20 Beta Reasoning was released on 2026-03-09.

Grok-4.20 Beta Reasoning is 1 month newer than GLM-5.

GLM-5

Feb 11, 2026

1 months ago

Grok-4.20 Beta Reasoning

Mar 9, 2026

1 weeks ago

3w 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

GLM-5 is available from ZAI. Grok-4.20 Beta Reasoning is available from xAI. The availability of providers can affect quality of the model and reliability.