Model Comparison

Grok-4 Fast Reasoning vs Qwen3 VL 4B Thinking

Comparing Grok-4 Fast Reasoning and Qwen3 VL 4B Thinking across benchmarks, pricing, and capabilities.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok-4 Fast Reasoning and Qwen3 VL 4B Thinking 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

Grok-4 Fast Reasoning costs less

For input processing, Grok-4 Fast Reasoning ($0.20/1M tokens) is 2.0x more expensive than Qwen3 VL 4B Thinking ($0.10/1M tokens).

For output processing, Grok-4 Fast Reasoning ($0.50/1M tokens) is 2.0x cheaper than Qwen3 VL 4B Thinking ($1.00/1M tokens).

In conclusion, Qwen3 VL 4B Thinking is more expensive than Grok-4 Fast Reasoning.*

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

Lowest available price from all providers

Mon May 25 2026 • llm-stats.com

Grok-4 Fast Reasoning

Input tokens$0.20

Output tokens$0.50

Best providerxAI

Qwen3 VL 4B Thinking

Input tokens$0.10

Output tokens$1.00

Best providerDeepinfra

Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok-4 Fast Reasoning accepts 2,000,000 input tokens compared to Qwen3 VL 4B Thinking's 262,144 tokens. Qwen3 VL 4B Thinking can generate longer responses up to 262,144 tokens, while Grok-4 Fast Reasoning is limited to 30,000 tokens.

Grok-4 Fast Reasoning

Input2,000,000 tokens

Output30,000 tokens

Qwen3 VL 4B Thinking

Input262,144 tokens

Output262,144 tokens

Mon May 25 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok-4 Fast Reasoning and Qwen3 VL 4B Thinking support multimodal inputs.

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

Grok-4 Fast Reasoning

Text

Images

Audio

Video

Qwen3 VL 4B Thinking

Text

Images

Audio

Video

License

Usage and distribution terms

Grok-4 Fast Reasoning is licensed under a proprietary license, while Qwen3 VL 4B Thinking uses Apache 2.0.

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

Grok-4 Fast Reasoning

Proprietary

Closed source

Qwen3 VL 4B Thinking

Apache 2.0

Open weights

Release Timeline

When each model was launched

Grok-4 Fast Reasoning was released on 2025-08-28, while Qwen3 VL 4B Thinking was released on 2025-09-22.

Qwen3 VL 4B Thinking is 1 month newer than Grok-4 Fast Reasoning.

Grok-4 Fast Reasoning

Aug 28, 2025

9 months ago

Qwen3 VL 4B Thinking

Sep 22, 2025

8 months ago

3w newer

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 Fast Reasoning is available from xAI. Qwen3 VL 4B Thinking is available from DeepInfra.

Grok-4 Fast Reasoning

xAI

Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M

Qwen3 VL 4B Thinking

Deepinfra

Input Price:Input: $0.10/1MOutput Price:Output: $1.00/1M

* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Grok-4 Fast Reasoning

View details

xAI

Larger context window (2,000,000 tokens)

Less expensive output tokens

Qwen3 VL 4B Thinking

View details

Alibaba Cloud / Qwen Team

Less expensive input tokens

Has open weights

Detailed Comparison

AI Model Comparison Table
Feature	Grok-4 Fast Reasoning	Qwen3 VL 4B Thinking

FAQ

Common questions about Grok-4 Fast Reasoning vs Qwen3 VL 4B Thinking.

Which is better, Grok-4 Fast Reasoning or Qwen3 VL 4B Thinking?

Grok-4 Fast Reasoning (xAI) and Qwen3 VL 4B Thinking (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.

How does Grok-4 Fast Reasoning compare to Qwen3 VL 4B Thinking in benchmarks?

Qwen3 VL 4B Thinking scores DocVQAtest: 94.2%, ScreenSpot: 92.9%, MMBench-V1.1: 86.7%, MMLU-Redux: 86.0%, AI2D: 84.9%.

Is Grok-4 Fast Reasoning cheaper than Qwen3 VL 4B Thinking?

Qwen3 VL 4B Thinking is 2.0x cheaper for input tokens. Grok-4 Fast Reasoning costs $0.20/M input and $0.50/M output via xai. Qwen3 VL 4B Thinking costs $0.10/M input and $1.00/M output via deepinfra.

What are the context window sizes for Grok-4 Fast Reasoning and Qwen3 VL 4B Thinking?

Grok-4 Fast Reasoning supports 2.0M tokens and Qwen3 VL 4B Thinking supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok-4 Fast Reasoning and Qwen3 VL 4B Thinking?

Key differences include context window (2.0M vs 262K), input pricing ($0.20 vs $0.10/M), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok-4 Fast Reasoning and Qwen3 VL 4B Thinking?

Grok-4 Fast Reasoning is developed by xAI and Qwen3 VL 4B Thinking is developed by Alibaba Cloud / Qwen Team.