Qwen3.5-397B-A17B vs Grok-4.1 Fast Reasoning Comparison

Comparing Qwen3.5-397B-A17B and Grok-4.1 Fast Reasoning across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Qwen3.5-397B-A17B and Grok-4.1 Fast Reasoning 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-4.1 Fast Reasoning costs less

For input processing, Qwen3.5-397B-A17B ($0.60/1M tokens) is 3.0x more expensive than Grok-4.1 Fast Reasoning ($0.20/1M tokens).

For output processing, Qwen3.5-397B-A17B ($3.60/1M tokens) is 7.2x more expensive than Grok-4.1 Fast Reasoning ($0.50/1M tokens).

In conclusion, Qwen3.5-397B-A17B is more expensive than Grok-4.1 Fast Reasoning.*

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

Lowest available price from all providers

Tue Mar 17 2026 • llm-stats.com

Qwen3.5-397B-A17B

Input tokens$0.60

Output tokens$3.60

Best providerNovita

Grok-4.1 Fast Reasoning

Input tokens$0.20

Output tokens$0.50

Best providerxAI

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Context Window

Maximum input and output token capacity

Grok-4.1 Fast Reasoning accepts 2,000,000 input tokens compared to Qwen3.5-397B-A17B's 262,144 tokens. Qwen3.5-397B-A17B can generate longer responses up to 64,000 tokens, while Grok-4.1 Fast Reasoning is limited to 30,000 tokens.

Qwen3.5-397B-A17B

Input262,144 tokens

Output64,000 tokens

Grok-4.1 Fast Reasoning

Input2,000,000 tokens

Output30,000 tokens

Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Qwen3.5-397B-A17B and Grok-4.1 Fast Reasoning support multimodal inputs.

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

Qwen3.5-397B-A17B

Text

Images

Audio

Video

Grok-4.1 Fast Reasoning

Text

Images

Audio

Video

License

Usage and distribution terms

Qwen3.5-397B-A17B is licensed under Apache 2.0, while Grok-4.1 Fast Reasoning uses a proprietary license.

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

Qwen3.5-397B-A17B

Apache 2.0

Open weights

Grok-4.1 Fast Reasoning

Proprietary

Closed source

Release Timeline

When each model was launched

Qwen3.5-397B-A17B was released on 2026-02-16, while Grok-4.1 Fast Reasoning was released on 2025-11-17.

Qwen3.5-397B-A17B is 3 months newer than Grok-4.1 Fast Reasoning.

Qwen3.5-397B-A17B

Feb 16, 2026

4 weeks ago

3mo newer

Grok-4.1 Fast Reasoning

Nov 17, 2025

4 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

Qwen3.5-397B-A17B is available from Novita. Grok-4.1 Fast Reasoning is available from xAI. The availability of providers can affect quality of the model and reliability.