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Claude Sonnet 5 vs DeepSeek V4 Pro 0423

Anthropic's flagship against the strongest open-weight alternative for a fraction of the cost.

What the numbers say

Derived from the live registry Zeplik routes and bills against. Credits: 1 credit = $0.10, raw provider rate with a 1.10x margin.

Side by side

Claude Sonnet 5

Anthropic

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...

Provider
Anthropic
Context window
1M tokens
Input price
22.0 credits / 1M tokens ($2.00 raw)
Output price
110 credits / 1M tokens ($10.00 raw)
Vision (image input)
Yes
Tool calling
Yes
Extended reasoning
No

Best for

  • Hard problems where answer quality matters more than cost: strategy, analysis, difficult writing
  • Very long documents and codebases: a 1M-token window fits entire books or repositories in one conversation
  • Working with images: screenshots, charts, photos and scanned documents alongside text
  • Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

DeepSeek V4 Pro 0423

DeepSeek

DeepSeek V4 Pro is a large-scale Mixture-of-Experts model from DeepSeek with 1.6T total parameters and 49B activated parameters, supporting a 1M-token context window. It is designed for advanced reasoning, coding,...

Provider
DeepSeek
Context window
1.0M tokens
Input price
9.1 credits / 1M tokens ($0.83 raw)
Output price
18.2 credits / 1M tokens ($1.66 raw)
Vision (image input)
No
Tool calling
Yes
Extended reasoning
No

Best for

  • Everyday chat and drafting on an open-weight model with transparent lineage
  • Very long documents and codebases: a 1.0M-token window fits entire books or repositories in one conversation
  • Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows

Try both on Zeplik

The honest answer to most model debates is to run your own prompt on both. Zeplik puts Claude Sonnet 5 and DeepSeek V4 Pro 0423 in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.

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Claude Sonnet 5 detailsDeepSeek V4 Pro 0423 detailsAll comparisons

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