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Kimi-k1.5 vs Qwen3.8 Flash

Qwen3.8 Flash leads the LLM Stats Score 49.6 to 17.4.

Moonshot AI · Alibaba Cloud / Qwen Team · Updated for 2026

Which is better?

Qwen3.8 Flash leads the overall LLM Stats Score 49.6 to 17.4, ranking #16 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Kimi-k1.5

  • you are already invested in the Moonshot AI ecosystem

Choose Qwen3.8 Flash

  • overall performance matters — it scores 49.6 and ranks #16 on LLM Stats
  • your work emphasizes reasoning — it leads those capability indexes
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Kimi-k1.5
Moonshot AI
Qwen3.8 Flash
Alibaba Cloud / Qwen Team
Core performance indexes
LLM Stats Score
17.4
#200
49.6
#16
Reasoning
16.6
#199
49.2
#16
Cost, coverage & limits
Benchmark wins
—
—
Input price
— / M
$0.15 / M
Output price
— / M
$0.47 / M
Context window
—
1,000,000

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Kimi-k1.5
Qwen3.8 Flash
Math
20.5#148
32.6#55
Vision
11.6#101
34.4#13
Multimodal
15.3#82
36.2#8
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Kimi-k1.5 · 22 for Qwen3.8 Flash

No common benchmarks found

Kimi-k1.5 and Qwen3.8 Flashdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

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).

Moonshot AI
Kimi-k1.5
Input- tokens
Output- tokens
Alibaba Cloud / Qwen Team
Qwen3.8 Flash
Input1,000,000 tokens
Output131,072 tokens
Mon Aug 31 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Kimi-k1.5 and Qwen3.8 Flash support multimodal inputs.

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

Kimi-k1.5

Text
Images
Audio
Video

Qwen3.8 Flash

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Kimi-k1.5

Proprietary

Closed source

Qwen3.8 Flash

Proprietary

Closed source

Release Timeline

When each model was launched

Kimi-k1.5 was released on 2025-01-20, while Qwen3.8 Flash was released on 2026-08-26.

Qwen3.8 Flash is 19 months newer than Kimi-k1.5.

Kimi-k1.5

Jan 20, 2025

1.6 years ago

Qwen3.8 Flash

Aug 26, 2026

4 days ago

1.6yr 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

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Kimi-k1.5 and Qwen3.8 Flash side-by-side, then vote on the output you prefer.

Kimi-k1.5
✓ Preferred
Qwen3.8 Flash
Open in Playground

FAQ

Common questions about Kimi-k1.5 vs Qwen3.8 Flash.

Which is better, Kimi-k1.5 or Qwen3.8 Flash?

Qwen3.8 Flash leads the LLM Stats Score 49.6 to 17.4. Kimi-k1.5 is made by Moonshot AI and Qwen3.8 Flash is made by Alibaba Cloud / Qwen Team. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Kimi-k1.5 compare to Qwen3.8 Flash in benchmarks?

Kimi-k1.5 scores MATH-500: 96.2%, CLUEWSC: 91.4%, C-Eval: 88.3%, MMLU: 87.4%, IFEval: 87.2%. Qwen3.8 Flash scores MathVision: 95.7%, LiveCodeBench v6: 91.9%, GPQA: 91.7%, CharXiv-R: 90.6%, RealWorldQA: 88.5%.

What are the context window sizes for Kimi-k1.5 and Qwen3.8 Flash?

Kimi-k1.5 supports an unknown number of tokens and Qwen3.8 Flash supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Kimi-k1.5 and Qwen3.8 Flash?

Key differences include LLM Stats Score (17.4 vs 49.6). See the full comparison above for benchmark-by-benchmark results.

Who makes Kimi-k1.5 and Qwen3.8 Flash?

Kimi-k1.5 is developed by Moonshot AI and Qwen3.8 Flash is developed by Alibaba Cloud / Qwen Team.

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