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Claude Sonnet 5 vs Gemini 3.7 Flash

A flagship against a flash tier that costs a fraction of it: the honest question is how much work actually needs the flagship.

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

Gemini 3.7 Flash

Google

Gemini 3.7 Flash is a multimodal model from Google for fast agentic workflows, coding, and complex multi-step reasoning. It is designed for tasks that require responsive performance and reliable multi-step...

Provider
Google
Context window
1.0M tokens
Input price
4.1 credits / 1M tokens ($0.38 raw)
Output price
20.6 credits / 1M tokens ($1.88 raw)
Vision (image input)
Yes
Tool calling
Yes
Extended reasoning
No

Best for

  • High-volume everyday tasks where speed and cost matter: summaries, drafts, quick questions
  • Very long documents and codebases: a 1.0M-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

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 Gemini 3.7 Flash in the same chat, so you can switch mid-conversation and compare answers on the work you actually do.

Pick a model and ask. Your prompt opens in the Zeplik app with that model selected.

Model to ask
Claude Sonnet 5 detailsGemini 3.7 Flash detailsAll comparisons

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Claude Sonnet 5 vs Gemini 3.7 Flash - Which AI Model to Use | Zeplik Chat