GPT-4.1 nano vs Grok Code Fast 1
Grok Code Fast 1 leads the LLM Stats Score 20.7 to 1.6. GPT-4.1 nano is 3.0x cheaper per token.
OpenAI · xAI · Updated for 2026
Which is better?
Grok Code Fast 1 leads the overall LLM Stats Score 20.7 to 1.6, ranking #195 overall.
On price, GPT-4.1 nano is roughly 3.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-4.1 nano also accepts a larger context window (1,047,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-4.1 nano
- cost matters — it's about 3.0x cheaper per token
- you process long inputs — it offers a 1,047,576 token context window
Choose Grok Code Fast 1
- overall performance matters — it scores 20.7 and ranks #195 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you want the most recent training data — it shipped Aug 2025
At a glance
The differences that matter most.
Individual benchmarks
24 reported for GPT-4.1 nano · 1 for Grok Code Fast 1
GPT-4.1 nano and Grok Code Fast 1don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-4.1 nano ($0.10/1M tokens) is 2.0x cheaper than Grok Code Fast 1 ($0.20/1M tokens).
For output processing, GPT-4.1 nano ($0.40/1M tokens) is 3.8x cheaper than Grok Code Fast 1 ($1.50/1M tokens).
In conclusion, Grok Code Fast 1 is more expensive than GPT-4.1 nano.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-4.1 nano accepts 1,047,576 input tokens compared to Grok Code Fast 1's 256,000 tokens. GPT-4.1 nano can generate longer responses up to 32,768 tokens, while Grok Code Fast 1 is limited to 10,000 tokens.
Input capabilities
Documented input modalities across available providers
GPT-4.1 nano supports multimodal inputs, whereas Grok Code Fast 1 does not.
GPT-4.1 nano can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-4.1 nano
Grok Code Fast 1
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-4.1 nano was released on 2025-04-14, while Grok Code Fast 1 was released on 2025-08-28.
Grok Code Fast 1 is 5 months newer than GPT-4.1 nano.
Apr 14, 2025
1.4 years ago
Aug 28, 2025
1.1 years ago
4mo newerKnowledge Cutoff
When training data ends
GPT-4.1 nano has a documented knowledge cutoff of 2024-05-31, while Grok Code Fast 1's cutoff date is not specified.
We can confirm GPT-4.1 nano's training data extends to 2024-05-31, but cannot make a direct comparison without Grok Code Fast 1's cutoff date.
May 2024
—
Provider Availability
GPT-4.1 nano is available from OpenAI. Grok Code Fast 1 is available from xAI.
GPT-4.1 nano
Grok Code Fast 1
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-4.1 nano and Grok Code Fast 1 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-4.1 nano vs Grok Code Fast 1.