DeepSeek-V2.5 vs Claude 3.5 Sonnet Comparison

Comparing DeepSeek-V2.5 and Claude 3.5 Sonnet across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

DeepSeek-V2.5 outperforms in 0 benchmarks, while Claude 3.5 Sonnet is better at 5 benchmarks (GSM8k, HumanEval, MATH, MMLU, SWE-Bench Verified).

Claude 3.5 Sonnet significantly outperforms across most benchmarks.

Wed Mar 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

DeepSeek-V2.5 costs less

For input processing, DeepSeek-V2.5 ($0.14/1M tokens) is 21.4x cheaper than Claude 3.5 Sonnet ($3.00/1M tokens).

For output processing, DeepSeek-V2.5 ($0.28/1M tokens) is 53.6x cheaper than Claude 3.5 Sonnet ($15.00/1M tokens).

In conclusion, Claude 3.5 Sonnet is more expensive than DeepSeek-V2.5.*

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

Lowest available price from all providers

Wed Mar 18 2026 • llm-stats.com

DeepSeek-V2.5

Input tokens$0.14

Output tokens$0.28

Best providerDeepSeek

Claude 3.5 Sonnet

Input tokens$3.00

Output tokens$15.00

Best providerAnthropic

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Context Window

Maximum input and output token capacity

Claude 3.5 Sonnet accepts 200,000 input tokens compared to DeepSeek-V2.5's 8,192 tokens. Claude 3.5 Sonnet can generate longer responses up to 200,000 tokens, while DeepSeek-V2.5 is limited to 8,192 tokens.

DeepSeek-V2.5

Input8,192 tokens

Output8,192 tokens

Claude 3.5 Sonnet

Input200,000 tokens

Output200,000 tokens

Wed Mar 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Claude 3.5 Sonnet supports multimodal inputs, whereas DeepSeek-V2.5 does not.

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

DeepSeek-V2.5

Text

Images

Audio

Video

Claude 3.5 Sonnet

Text

Images

Audio

Video

License

Usage and distribution terms

DeepSeek-V2.5 is licensed under deepseek, while Claude 3.5 Sonnet uses a proprietary license.

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

DeepSeek-V2.5

deepseek

Open weights

Claude 3.5 Sonnet

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V2.5 was released on 2024-05-08, while Claude 3.5 Sonnet was released on 2024-10-22.

Claude 3.5 Sonnet is 6 months newer than DeepSeek-V2.5.

DeepSeek-V2.5

May 8, 2024

1.9 years ago

Claude 3.5 Sonnet

Oct 22, 2024

1.4 years ago

5mo 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

DeepSeek-V2.5 is available from DeepSeek, DeepInfra, Hyperbolic. Claude 3.5 Sonnet is available from Anthropic, Bedrock, Google. The availability of providers can affect quality of the model and reliability.