Grok-4.1 Fast Non-Reasoning vs Qwen2.5 72B Instruct
Comparing Grok-4.1 Fast Non-Reasoning and Qwen2.5 72B Instruct across benchmarks, pricing, and capabilities.
xAI · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
Grok-4.1 Fast Non-Reasoning and Qwen2.5 72B Instruct trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Grok-4.1 Fast Non-Reasoning is roughly 1.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok-4.1 Fast Non-Reasoning also accepts a larger context window (2,000,000 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 Grok-4.1 Fast Non-Reasoning
- cost matters — it's about 1.3x cheaper per token
- you process long inputs — it offers a 2,000,000 token context window
- you want the most recent training data — it shipped Nov 2025
Choose Qwen2.5 72B Instruct
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
0 reported for Grok-4.1 Fast Non-Reasoning · 14 for Qwen2.5 72B Instruct
Grok-4.1 Fast Non-Reasoning and Qwen2.5 72B Instructdon'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, Grok-4.1 Fast Non-Reasoning ($0.20/1M tokens) is 1.7x cheaper than Qwen2.5 72B Instruct ($0.35/1M tokens).
For output processing, Grok-4.1 Fast Non-Reasoning ($0.50/1M tokens) is 1.3x more expensive than Qwen2.5 72B Instruct ($0.40/1M tokens).
In conclusion, Qwen2.5 72B Instruct is more expensive than Grok-4.1 Fast Non-Reasoning.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok-4.1 Fast Non-Reasoning accepts 2,000,000 input tokens compared to Qwen2.5 72B Instruct's 131,072 tokens. Grok-4.1 Fast Non-Reasoning can generate longer responses up to 30,000 tokens, while Qwen2.5 72B Instruct is limited to 8,192 tokens.
Input capabilities
Documented input modalities across available providers
Grok-4.1 Fast Non-Reasoning supports multimodal inputs, whereas Qwen2.5 72B Instruct does not.
Grok-4.1 Fast Non-Reasoning can handle both text and other forms of data like images, making it suitable for multimodal applications.
Grok-4.1 Fast Non-Reasoning
Qwen2.5 72B Instruct
License
Usage and distribution terms
Grok-4.1 Fast Non-Reasoning is licensed under a proprietary license, while Qwen2.5 72B Instruct uses Qwen.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Qwen
Open weights
Release Timeline
When each model was launched
Grok-4.1 Fast Non-Reasoning was released on 2025-11-17, while Qwen2.5 72B Instruct was released on 2024-09-19.
Grok-4.1 Fast Non-Reasoning is 14 months newer than Qwen2.5 72B Instruct.
Nov 17, 2025
10 months ago
1.2yr newerSep 19, 2024
2.0 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Grok-4.1 Fast Non-Reasoning is available from xAI. Qwen2.5 72B Instruct is available from DeepInfra, Hyperbolic, Fireworks, Together.
Grok-4.1 Fast Non-Reasoning
Qwen2.5 72B Instruct
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok-4.1 Fast Non-Reasoning and Qwen2.5 72B Instruct side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok-4.1 Fast Non-Reasoning vs Qwen2.5 72B Instruct.