Claude Sonnet 4.6 vs Gemini 3.5 Flash

Anthropic's Claude Sonnet 4.6 against Google's Gemini 3.5 Flash — price, context and what each is best at. Both are available through one OpenAI-compatible API.

AnyModel — you pay	Claude Sonnet 4.6	Gemini 3.5 Flash
Vendor	Anthropic	Google
Input / 1M	$0.24	$0.03
Output / 1M	$0.24	$0.03
Context	1M	1M
Best for	Claude Code	Agents

Claude Sonnet 4.6

The balanced Claude — fast, smart, affordable.

Claude Sonnet 4.6 hits the sweet spot of speed, intelligence and price, with the context window now grown to 1M tokens. It's the default Claude for coding agents and most production workloads.

More about Claude Sonnet 4.6 →

Gemini 3.5 Flash

Google's newest default — frontier smarts at a Flash price.

Gemini 3.5 Flash is Google's freshest GA model: it beats Gemini 3.1 Pro on agentic and coding benchmarks while running about 4× faster, with selectable thinking levels and a 1M-token window — the new default pick of the Gemini line.

More about Gemini 3.5 Flash →

Quick take: Gemini 3.5 Flash is cheaper on output tokens ($0.03 vs $0.24 per 1M). Compare their strengths and context for your task; you can switch the model id at any time.

FAQ

Which is cheaper, Claude Sonnet 4.6 or Gemini 3.5 Flash?

Gemini 3.5 Flash is cheaper on output tokens ($0.03 vs $0.24 per 1M).

Which has a larger context window, Claude Sonnet 4.6 or Gemini 3.5 Flash?

Claude Sonnet 4.6: 1M; Gemini 3.5 Flash: 1M.