Kimi K2.5 vs Qwen3.8-Flash-Next
Qwen3.8-Flash-Next significantly outperforms across most benchmarks.
Moonshot AI · Alibaba Cloud / Qwen Team · Updated for 2026
Which is better?
Kimi K2.5 outperforms in 1 benchmarks (Humanity's Last Exam), while Qwen3.8-Flash-Next is better at 7 benchmarks (CharXiv-R, GPQA, LiveCodeBench v6, LVBench, MathVision, SWE-bench Multilingual, SWE-Bench Pro). Qwen3.8-Flash-Next significantly outperforms across most benchmarks.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Kimi K2.5
- you want predictable pricing at $0.60/M input and $3.00/M output
Choose Qwen3.8-Flash-Next
- you want the strongest raw capability — it leads on 7 of 8 shared benchmarks
- you want the most recent training data — it shipped Aug 2026
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Kimi K2.5 outperforms in 1 benchmarks (Humanity's Last Exam), while Qwen3.8-Flash-Next is better at 7 benchmarks (CharXiv-R, GPQA, LiveCodeBench v6, LVBench, MathVision, SWE-bench Multilingual, SWE-Bench Pro).
Qwen3.8-Flash-Next significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Model Size
Parameter count comparison
Kimi K2.5 has 875.0B more parameters than Qwen3.8-Flash-Next, making it 700.0% larger.
Context Window
Maximum input and output token capacity
Only Kimi K2.5 specifies input context (262,100 tokens). Only Kimi K2.5 specifies output context (262,100 tokens).
Input Capabilities
Supported data types and modalities
Both Kimi K2.5 and Qwen3.8-Flash-Next support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Kimi K2.5
Qwen3.8-Flash-Next
License
Usage and distribution terms
Kimi K2.5 is licensed under MIT, while Qwen3.8-Flash-Next uses Qwen Community License 1.0.
License differences may affect how you can use these models in commercial or open-source projects.
MIT
Open weights
Qwen Community License 1.0
Open weights
Release Timeline
When each model was launched
Kimi K2.5 was released on 2026-01-27, while Qwen3.8-Flash-Next was released on 2026-08-26.
Qwen3.8-Flash-Next is 7 months newer than Kimi K2.5.
Jan 27, 2026
7 months ago
Aug 26, 2026
0 days ago
7mo newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Outputs Comparison
Judge for yourself.
Run your own prompts against Kimi K2.5 and Qwen3.8-Flash-Next side-by-side, then vote on the output you prefer.
FAQ
Common questions about Kimi K2.5 vs Qwen3.8-Flash-Next.