GPT-5.1 vs Grok 4
A detailed comparison to help you choose the right AI tool for your needs.
Our Pick
GPT-5.1 Instant
GPT-5.1 Instant edges out Grok 4.1 with superior overall performance and features that make it the better choice for most users.
Try GPT-5.1Feature Comparison
Feature
GPT-5.1
Grok 4
Ratings
Overall Rating
4.7
4.6
Coding
4.5
4.5
Writing
4.6
4.4
Reasoning
4.8
4.6
Speed
4.8
4.7
Value
4.6
4.3
Pricing
Monthly Price
$20
$25
Free Tier
Input (per 1M tokens)
$2.5
$5
Output (per 1M tokens)
$10
$15
Features
Context Window
128K
256K
Vision/Images
Audio
Video
Code Generation
AI Agents
GPT-5.1 Instant
Pros
- Fast responses with adaptive reasoning
- New personalization presets
- Strong math and coding improvements
- Multimodal (text, image, audio)
- Free tier available
Cons
- Coding not as strong as Claude Opus
- Can be verbose
- Writing style less natural than Claude
Grok 4.1
Pros
- Real-time access to X (Twitter) data
- Best for current events and live data
- Strong coding (74.9% SWE-bench)
- Less filtered/censored responses
- 256K context window
Cons
- Requires X Premium+ subscription
- Less polished than competitors
- Limited enterprise features
- No free tier
Choose GPT-5.1 if you need:
General assistant, math problems, quick coding help
Choose Grok 4 if you need:
Current events, real-time data, social media analysis
Ready to get started?
Both tools offer free tiers or trials. Try them out and see which one works best for your workflow.