GPT-5.2 vs Grok-4.20 Beta Reasoning Comparison
Comparing GPT-5.2 and Grok-4.20 Beta Reasoning across benchmarks, pricing, and capabilities.
Performance Benchmarks
Comparative analysis across standard metrics
GPT-5.2 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
For input processing, GPT-5.2 ($1.75/1M tokens) is 1.1x cheaper than Grok-4.20 Beta Reasoning ($2.00/1M tokens).
For output processing, GPT-5.2 ($14.00/1M tokens) is 2.3x more expensive than Grok-4.20 Beta Reasoning ($6.00/1M tokens).
In conclusion, GPT-5.2 is more expensive than Grok-4.20 Beta Reasoning.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4.20 Beta Reasoning accepts 2,000,000 input tokens compared to GPT-5.2's 400,000 tokens. GPT-5.2 can generate longer responses up to 128,000 tokens, while Grok-4.20 Beta Reasoning is limited to 30,000 tokens.
Input Capabilities
Supported data types and modalities
Both GPT-5.2 and Grok-4.20 Beta Reasoning support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
GPT-5.2
Grok-4.20 Beta Reasoning
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-5.2 was released on 2025-12-11, while Grok-4.20 Beta Reasoning was released on 2026-03-09.
Grok-4.20 Beta Reasoning is 3 months newer than GPT-5.2.
Dec 11, 2025
3 months ago
Mar 9, 2026
1 weeks ago
2mo newerKnowledge Cutoff
When training data ends
GPT-5.2 has a documented knowledge cutoff of 2025-08-25, while Grok-4.20 Beta Reasoning's cutoff date is not specified.
We can confirm GPT-5.2's training data extends to 2025-08-25, but cannot make a direct comparison without Grok-4.20 Beta Reasoning's cutoff date.
Aug 2025
—
Provider Availability
GPT-5.2 is available from OpenAI. Grok-4.20 Beta Reasoning is available from xAI. The availability of providers can affect quality of the model and reliability.
GPT-5.2
Grok-4.20 Beta Reasoning
Outputs Comparison
Key Takeaways
GPT-5.2
View detailsOpenAI
Detailed Comparison
| Feature | | |
|---|