o3-mini vs Grok-4.20 Beta Reasoning Comparison

Comparing o3-mini 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

o3-mini 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

o3-mini costs less

For input processing, o3-mini ($1.10/1M tokens) is 1.8x cheaper than Grok-4.20 Beta Reasoning ($2.00/1M tokens).

For output processing, o3-mini ($4.40/1M tokens) is 1.4x cheaper than Grok-4.20 Beta Reasoning ($6.00/1M tokens).

In conclusion, Grok-4.20 Beta Reasoning is more expensive than o3-mini.*

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

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

o3-mini

Input tokens$1.10

Output tokens$4.40

Best providerAzure

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 o3-mini's 200,000 tokens. o3-mini can generate longer responses up to 100,000 tokens, while Grok-4.20 Beta Reasoning is limited to 30,000 tokens.

o3-mini

Input200,000 tokens

Output100,000 tokens

Grok-4.20 Beta Reasoning

Input2,000,000 tokens

Output30,000 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok-4.20 Beta Reasoning supports multimodal inputs, whereas o3-mini does not.

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

o3-mini

Text

Images

Audio

Video

Grok-4.20 Beta Reasoning

Text

Images

Audio

Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

o3-mini

Proprietary

Closed source

Grok-4.20 Beta Reasoning

Proprietary

Closed source

Release Timeline

When each model was launched

o3-mini was released on 2025-01-30, while Grok-4.20 Beta Reasoning was released on 2026-03-09.

Grok-4.20 Beta Reasoning is 13 months newer than o3-mini.

o3-mini

Jan 30, 2025

1.1 years ago

Grok-4.20 Beta Reasoning

Mar 9, 2026

5 days ago

1.1yr newer

Knowledge Cutoff

When training data ends

o3-mini has a documented knowledge cutoff of 2023-09-30, while Grok-4.20 Beta Reasoning's cutoff date is not specified.

We can confirm o3-mini's training data extends to 2023-09-30, but cannot make a direct comparison without Grok-4.20 Beta Reasoning's cutoff date.

o3-mini

Sep 2023

Grok-4.20 Beta Reasoning

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Provider Availability

o3-mini is available from Azure, OpenAI. Grok-4.20 Beta Reasoning is available from xAI. The availability of providers can affect quality of the model and reliability.