Skip to main content
Sign inSign up

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, computed from the raw provider rate with a 1.20x 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.

Provider
Anthropic
Context window
1M tokens
Input price
24.0 credits / 1M tokens ($2.00 raw)
Output price
120 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.

Provider
Google
Context window
1.0M tokens
Input price
9.0 credits / 1M tokens ($0.75 raw)
Output price
45.0 credits / 1M tokens ($3.75 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

Frequently asked questions

What is the difference between Claude Sonnet 5 and Gemini 3.7 Flash?
Gemini 3.7 Flash is about 2.7x cheaper on output tokens (45.0 vs 120 credits per 1M). Gemini 3.7 Flash is the newer release (August 2026 vs June 2026).
Is Claude Sonnet 5 or Gemini 3.7 Flash cheaper?
Gemini 3.7 Flash is cheaper: 45.0 credits per million output tokens against 120. 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin.
Which has the larger context window, Claude Sonnet 5 or Gemini 3.7 Flash?
Gemini 3.7 Flash, at 1.0M tokens against 1M.
Can I use both Claude Sonnet 5 and Gemini 3.7 Flash on Zeplik?
Yes. Zeplik is a multi-model chat, so both sit behind one account and you can switch between them mid-conversation to compare answers on your own prompt.
Do Claude Sonnet 5 and Gemini 3.7 Flash need a paid plan?
Both need a paid plan (Plus or above). Usage is then billed in credits from your monthly allowance.

Related comparisons

Claude Sonnet 5 detailsGemini 3.7 Flash detailsAll comparisons

Explore Zeplik