Model Comparison

Grok-4.1 Fast Reasoning vs Qwen3 VL 8B Instruct

Comparing Grok-4.1 Fast Reasoning and Qwen3 VL 8B Instruct across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok-4.1 Fast Reasoning and Qwen3 VL 8B Instruct 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

Qwen3 VL 8B Instruct costs less

For input processing, Grok-4.1 Fast Reasoning ($0.20/1M tokens) is 2.5x more expensive than Qwen3 VL 8B Instruct ($0.08/1M tokens).

For output processing, Grok-4.1 Fast Reasoning ($0.50/1M tokens) costs the same as Qwen3 VL 8B Instruct ($0.50/1M tokens).

In conclusion, Grok-4.1 Fast Reasoning is more expensive than Qwen3 VL 8B Instruct.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Apr 21 2026 • llm-stats.com
xAI
Grok-4.1 Fast Reasoning
Input tokens$0.20
Output tokens$0.50
Best providerxAI
Alibaba Cloud / Qwen Team
Qwen3 VL 8B Instruct
Input tokens$0.08
Output tokens$0.50
Best providerNovita
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok-4.1 Fast Reasoning accepts 2,000,000 input tokens compared to Qwen3 VL 8B Instruct's 131,072 tokens. Qwen3 VL 8B Instruct can generate longer responses up to 32,768 tokens, while Grok-4.1 Fast Reasoning is limited to 30,000 tokens.

xAI
Grok-4.1 Fast Reasoning
Input2,000,000 tokens
Output30,000 tokens
Alibaba Cloud / Qwen Team
Qwen3 VL 8B Instruct
Input131,072 tokens
Output32,768 tokens
Tue Apr 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok-4.1 Fast Reasoning and Qwen3 VL 8B Instruct support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Grok-4.1 Fast Reasoning

Text
Images
Audio
Video

Qwen3 VL 8B Instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Grok-4.1 Fast Reasoning is licensed under a proprietary license, while Qwen3 VL 8B Instruct uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

Grok-4.1 Fast Reasoning

Proprietary

Closed source

Qwen3 VL 8B Instruct

Apache 2.0

Open weights

Release Timeline

When each model was launched

Grok-4.1 Fast Reasoning was released on 2025-11-17, while Qwen3 VL 8B Instruct was released on 2025-09-22.

Grok-4.1 Fast Reasoning is 2 months newer than Qwen3 VL 8B Instruct.

Grok-4.1 Fast Reasoning

Nov 17, 2025

5 months ago

1mo newer
Qwen3 VL 8B Instruct

Sep 22, 2025

7 months ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Grok-4.1 Fast Reasoning is available from xAI. Qwen3 VL 8B Instruct is available from Novita, DeepInfra.

Grok-4.1 Fast Reasoning

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M

Qwen3 VL 8B Instruct

novita logo
Novita
Input Price:Input: $0.08/1MOutput Price:Output: $0.50/1M
deepinfra logo
Deepinfra
Input Price:Input: $0.18/1MOutput Price:Output: $0.69/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

xAI
Larger context window (2,000,000 tokens)
Alibaba Cloud / Qwen Team

Qwen3 VL 8B Instruct

View details

Alibaba Cloud / Qwen Team

Less expensive input tokens
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok-4.1 Fast Reasoning
Alibaba Cloud / Qwen Team
Qwen3 VL 8B Instruct

FAQ

Common questions about Grok-4.1 Fast Reasoning vs Qwen3 VL 8B Instruct

Grok-4.1 Fast Reasoning (xAI) and Qwen3 VL 8B Instruct (Alibaba Cloud / Qwen Team) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.
Qwen3 VL 8B Instruct scores DocVQAtest: 96.1%, ScreenSpot: 94.4%, OCRBench: 89.6%, AI2D: 85.7%, MMBench-V1.1: 85.0%.
Qwen3 VL 8B Instruct is 2.5x cheaper for input tokens. Grok-4.1 Fast Reasoning costs $0.20/M input and $0.50/M output via xai. Qwen3 VL 8B Instruct costs $0.08/M input and $0.50/M output via novita.
Grok-4.1 Fast Reasoning supports 2.0M tokens and Qwen3 VL 8B Instruct supports 131K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (2.0M vs 131K), input pricing ($0.20 vs $0.08/M), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.
Grok-4.1 Fast Reasoning is developed by xAI and Qwen3 VL 8B Instruct is developed by Alibaba Cloud / Qwen Team.