Claude 3.5 Sonnet vs Kimi K2-Thinking-0905 Comparison

Comparing Claude 3.5 Sonnet and Kimi K2-Thinking-0905 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Claude 3.5 Sonnet outperforms in 0 benchmarks, while Kimi K2-Thinking-0905 is better at 2 benchmarks (GPQA, MMLU-Pro).

Kimi K2-Thinking-0905 significantly outperforms across most benchmarks.

Sat Mar 14 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K2-Thinking-0905 costs less

For input processing, Claude 3.5 Sonnet ($3.00/1M tokens) is 6.4x more expensive than Kimi K2-Thinking-0905 ($0.47/1M tokens).

For output processing, Claude 3.5 Sonnet ($15.00/1M tokens) is 7.5x more expensive than Kimi K2-Thinking-0905 ($2.00/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than Kimi K2-Thinking-0905.*

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

Lowest available price from all providers

Sat Mar 14 2026 • llm-stats.com

Claude 3.5 Sonnet

Input tokens$3.00

Output tokens$15.00

Best providerAWS Bedrock

Kimi K2-Thinking-0905

Input tokens$0.47

Output tokens$2.00

Best providerDeepinfra

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Context Window

Maximum input and output token capacity

Kimi K2-Thinking-0905 accepts 262,144 input tokens compared to Claude 3.5 Sonnet's 200,000 tokens. Kimi K2-Thinking-0905 can generate longer responses up to 262,144 tokens, while Claude 3.5 Sonnet is limited to 200,000 tokens.

Claude 3.5 Sonnet

Input200,000 tokens

Output200,000 tokens

Kimi K2-Thinking-0905

Input262,144 tokens

Output262,144 tokens

Sat Mar 14 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3.5 Sonnet supports multimodal inputs, whereas Kimi K2-Thinking-0905 does not.

Claude 3.5 Sonnet can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude 3.5 Sonnet

Text

Images

Audio

Video

Kimi K2-Thinking-0905

Text

Images

Audio

Video

License

Usage and distribution terms

Claude 3.5 Sonnet is licensed under a proprietary license, while Kimi K2-Thinking-0905 uses MIT.

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

Claude 3.5 Sonnet

Proprietary

Closed source

Kimi K2-Thinking-0905

MIT

Open weights

Release Timeline

When each model was launched

Claude 3.5 Sonnet was released on 2024-06-21, while Kimi K2-Thinking-0905 was released on 2025-09-05.

Kimi K2-Thinking-0905 is 15 months newer than Claude 3.5 Sonnet.

Claude 3.5 Sonnet

Jun 21, 2024

1.7 years ago

Kimi K2-Thinking-0905

Sep 5, 2025

6 months ago

1.2yr 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

Claude 3.5 Sonnet is available from Bedrock, Google. Kimi K2-Thinking-0905 is available from DeepInfra, Novita, Fireworks. The availability of providers can affect quality of the model and reliability.