Model Comparison

Kimi K2 0905 vs LongCat-Flash-ThinkingWhich is better in 2026?

LongCat-Flash-Thinking significantly outperforms across most benchmarks. LongCat-Flash-Thinking is 2.0x cheaper per token.

Verdict: Kimi K2 0905 vs LongCat-Flash-Thinking — which is better?

Kimi K2 0905 (by Moonshot AI) and LongCat-Flash-Thinking (by Meituan) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Kimi K2 0905 outperforms in 0 benchmarks, while LongCat-Flash-Thinking is better at 3 benchmarks (AIME 2024, GPQA, MMLU-Pro). LongCat-Flash-Thinking significantly outperforms across most benchmarks.

On price, LongCat-Flash-Thinking is roughly 2.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Kimi K2 0905 also accepts a larger context window (262,144 input tokens), making it the stronger choice for long documents and large codebases.

Choose Kimi K2 0905 if…

  • you process long inputs — it offers a 262,144 token context window

Choose LongCat-Flash-Thinking if…

  • you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
  • cost matters — it's about 2.0x cheaper per token
  • you want the most recent training data — it shipped Sep 2025
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Kimi K2 0905 outperforms in 0 benchmarks, while LongCat-Flash-Thinking is better at 3 benchmarks (AIME 2024, GPQA, MMLU-Pro).

LongCat-Flash-Thinking significantly outperforms across most benchmarks.

Sun Jul 26 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

LongCat-Flash-Thinking costs less

For input processing, Kimi K2 0905 ($0.60/1M tokens) is 2.0x more expensive than LongCat-Flash-Thinking ($0.30/1M tokens).

For output processing, Kimi K2 0905 ($2.50/1M tokens) is 2.1x more expensive than LongCat-Flash-Thinking ($1.20/1M tokens).

In conclusion, Kimi K2 0905 is more expensive than LongCat-Flash-Thinking.*

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

Lowest available price from all providers
Sun Jul 26 2026 • llm-stats.com
Moonshot AI
Kimi K2 0905
Input tokens$0.60
Output tokens$2.50
Best providerNovita
Meituan
LongCat-Flash-Thinking
Input tokens$0.30
Output tokens$1.20
Best providerMeituan
Notice missing or incorrect data?Start an Issue→

Model Size

Parameter count comparison

440.0B diff

Kimi K2 0905 has 440.0B more parameters than LongCat-Flash-Thinking, making it 78.6% larger.

Moonshot AI
Kimi K2 0905
1.0Tparameters
Meituan
LongCat-Flash-Thinking
560.0Bparameters
1000.0B
Kimi K2 0905
560.0B
LongCat-Flash-Thinking

Context Window

Maximum input and output token capacity

Kimi K2 0905 accepts 262,144 input tokens compared to LongCat-Flash-Thinking's 128,000 tokens. Kimi K2 0905 can generate longer responses up to 262,144 tokens, while LongCat-Flash-Thinking is limited to 128,000 tokens.

Moonshot AI
Kimi K2 0905
Input262,144 tokens
Output262,144 tokens
Meituan
LongCat-Flash-Thinking
Input128,000 tokens
Output128,000 tokens
Sun Jul 26 2026 • llm-stats.com

License

Usage and distribution terms

Kimi K2 0905 is licensed under a proprietary license, while LongCat-Flash-Thinking uses MIT.

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

Kimi K2 0905

Proprietary

Closed source

LongCat-Flash-Thinking

MIT

Open weights

Release Timeline

When each model was launched

Kimi K2 0905 was released on 2025-09-05, while LongCat-Flash-Thinking was released on 2025-09-22.

LongCat-Flash-Thinking is 1 month newer than Kimi K2 0905.

Kimi K2 0905

Sep 5, 2025

10 months ago

LongCat-Flash-Thinking

Sep 22, 2025

10 months ago

2w 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

Kimi K2 0905 is available from Novita. LongCat-Flash-Thinking is available from Meituan.

Kimi K2 0905

novita logo
Novita
Input Price:Input: $0.60/1MOutput Price:Output: $2.50/1M

LongCat-Flash-Thinking

meituan logo
Meituan
Input Price:Input: $0.30/1MOutput Price:Output: $1.20/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Moonshot AI
Larger context window (262,144 tokens)
Meituan
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher AIME 2024 score (93.3% vs 72.0%)
Higher GPQA score (81.5% vs 75.8%)
Higher MMLU-Pro score (82.6% vs 82.5%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Kimi K2 0905 and LongCat-Flash-Thinking side-by-side, then vote on the output you prefer.

Kimi K2 0905
✓ Preferred
LongCat-Flash-Thinking
Open in Playground
AI Model Comparison Table
Feature
Moonshot AI
Kimi K2 0905
Meituan
LongCat-Flash-Thinking

FAQ

Common questions about Kimi K2 0905 vs LongCat-Flash-Thinking.

Which is better, Kimi K2 0905 or LongCat-Flash-Thinking?

LongCat-Flash-Thinking significantly outperforms across most benchmarks. Kimi K2 0905 is made by Moonshot AI and LongCat-Flash-Thinking is made by Meituan. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Kimi K2 0905 compare to LongCat-Flash-Thinking in benchmarks?

Kimi K2 0905 scores HumanEval: 94.5%, MMLU: 90.2%, MATH: 89.1%, MMLU-Pro: 82.5%, GPQA: 75.8%. LongCat-Flash-Thinking scores MATH-500: 99.2%, ZebraLogic: 95.5%, AIME 2024: 93.3%, AIME 2025: 90.6%, MMLU-Redux: 89.3%.

Is Kimi K2 0905 cheaper than LongCat-Flash-Thinking?

LongCat-Flash-Thinking is 2.0x cheaper for input tokens. Kimi K2 0905 costs $0.60/M input and $2.50/M output via novita. LongCat-Flash-Thinking costs $0.30/M input and $1.20/M output via meituan.

What are the context window sizes for Kimi K2 0905 and LongCat-Flash-Thinking?

Kimi K2 0905 supports 262K tokens and LongCat-Flash-Thinking supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Kimi K2 0905 and LongCat-Flash-Thinking?

Key differences include context window (262K vs 128K), input pricing ($0.60 vs $0.30/M), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Kimi K2 0905 and LongCat-Flash-Thinking?

Kimi K2 0905 is developed by Moonshot AI and LongCat-Flash-Thinking is developed by Meituan.

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