Grok Code Fast 1 vs Qwen2.5 72B Instruct
Comparing Grok Code Fast 1 and Qwen2.5 72B Instruct across benchmarks, pricing, and capabilities.
xAI · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
Grok Code Fast 1 and Qwen2.5 72B Instruct trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Qwen2.5 72B Instruct is roughly 1.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok Code Fast 1 also accepts a larger context window (256,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Grok Code Fast 1
- you process long inputs — it offers a 256,000 token context window
- you want the most recent training data — it shipped Aug 2025
Choose Qwen2.5 72B Instruct
- cost matters — it's about 1.4x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Grok Code Fast 1 and Qwen2.5 72B Instructdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Grok Code Fast 1 ($0.20/1M tokens) is 1.7x cheaper than Qwen2.5 72B Instruct ($0.35/1M tokens).
For output processing, Grok Code Fast 1 ($1.50/1M tokens) is 3.8x more expensive than Qwen2.5 72B Instruct ($0.40/1M tokens).
In conclusion, Grok Code Fast 1 is more expensive than Qwen2.5 72B Instruct.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok Code Fast 1 accepts 256,000 input tokens compared to Qwen2.5 72B Instruct's 131,072 tokens. Grok Code Fast 1 can generate longer responses up to 10,000 tokens, while Qwen2.5 72B Instruct is limited to 8,192 tokens.
License
Usage and distribution terms
Grok Code Fast 1 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 Code Fast 1 was released on 2025-08-28, while Qwen2.5 72B Instruct was released on 2024-09-19.
Grok Code Fast 1 is 11 months newer than Qwen2.5 72B Instruct.
Aug 28, 2025
12 months ago
11mo newerSep 19, 2024
1.9 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 Code Fast 1 is available from xAI. Qwen2.5 72B Instruct is available from DeepInfra, Hyperbolic, Fireworks, Together.
Grok Code Fast 1
Qwen2.5 72B Instruct
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok Code Fast 1 and Qwen2.5 72B Instruct side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok Code Fast 1 vs Qwen2.5 72B Instruct.