Phi 4 Reasoning Plus vs Qwen3.8 Flash
Qwen3.8 Flash leads the LLM Stats Score 49.6 to 15.3.
Microsoft · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
Qwen3.8 Flash leads the overall LLM Stats Score 49.6 to 15.3, ranking #16 overall.
In the 1 individual benchmarks reported for both models, Qwen3.8 Flash wins 1; this is a narrower head-to-head signal than the composite indexes.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Phi 4 Reasoning Plus
- you need open weights you can self-host or fine-tune
Choose Qwen3.8 Flash
- overall performance matters — it scores 49.6 and ranks #16 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
11 reported for Phi 4 Reasoning Plus · 22 for Qwen3.8 Flash
Phi 4 Reasoning Plus outperforms in 0 benchmarks, while Qwen3.8 Flash is better at 1 benchmark (GPQA).
Qwen3.8 Flash significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Model Size
Parameter count comparison
Qwen3.8 Flash has 111.0B more parameters than Phi 4 Reasoning Plus, making it 792.9% larger.
Context Window
Maximum input and output token capacity
Only Qwen3.8 Flash specifies input context (1,000,000 tokens). Only Qwen3.8 Flash specifies output context (131,072 tokens).
Input capabilities
Documented input modalities across available providers
Qwen3.8 Flash supports multimodal inputs, whereas Phi 4 Reasoning Plus does not.
Qwen3.8 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.
Phi 4 Reasoning Plus
Qwen3.8 Flash
License
Usage and distribution terms
Phi 4 Reasoning Plus is licensed under MIT, while Qwen3.8 Flash uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Phi 4 Reasoning Plus was released on 2025-04-30, while Qwen3.8 Flash was released on 2026-08-26.
Qwen3.8 Flash is 16 months newer than Phi 4 Reasoning Plus.
Apr 30, 2025
1.3 years ago
Aug 26, 2026
5 days ago
1.3yr newerKnowledge Cutoff
When training data ends
Phi 4 Reasoning Plus has a documented knowledge cutoff of 2025-03-01, while Qwen3.8 Flash's cutoff date is not specified.
We can confirm Phi 4 Reasoning Plus's training data extends to 2025-03-01, but cannot make a direct comparison without Qwen3.8 Flash's cutoff date.
Mar 2025
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Outputs Comparison
Judge for yourself.
Run your own prompts against Phi 4 Reasoning Plus and Qwen3.8 Flash side-by-side, then vote on the output you prefer.
FAQ
Common questions about Phi 4 Reasoning Plus vs Qwen3.8 Flash.