Claude 3.5 Sonnet latest vs Gemini 2.5 Flash

Name: Gemini 2.5 Flash
Brand: Google Vertex AI
Price: 0.300000 USD

Claude 3.5 Sonnet latest vs Gemini 2.5 Flash: Gemini 2.5 Flash is cheaper by 90% on average. Claude 3.5 Sonnet latest from Anthropic (200,000-token context, tool calls) vs. Gemini 2.5 Flash from Google Vertex AI (1,048,576-token context, reasoning, tool calls). Use Agent Command Center to A/B both in shadow mode and pick the winner per workload.

Side-by-side cost

Live workload comparison

Same workload run through both models. The cheaper one is highlighted.

Input tokens / request3,000

01,048,576

Output tokens / request400

065,535

Requests / day5,000

01,000,000

Claude 3.5 Sonnet latest

Anthropic

$2,283/mo

Input $3.00/M · Output $15.00/M

Gemini 2.5 FlashCheaper

Google Vertex AI

$289/mo

Input $0.300/M · Output $2.50/M

At this workload, Gemini 2.5 Flash is 87% cheaper than Claude 3.5 Sonnet latest — a savings of $1,994/month ($23,924/year).

Production recipe — Agent Command Center

strategy: cost-optimized
primary:
  model: gemini-2-5-flash
  provider: vertex-ai
fallback:
  model: claude-3-5-sonnet-latest
  provider: anthropic
shadow: { sample_rate: 0.05 }   # mirror 5% of traffic to compare quality live

Get started free →Routing docs ↗

	Claude 3.5 Sonnet latest Anthropic	Gemini 2.5 Flash Google Vertex AI
Input price	$3.00/M	$0.300/M
Output price	$15.00/M	$2.50/M
Context window	200,000	1,048,576
Max output	8,192	65,535
Function calling	✓	✓
Vision	✓	✓
Audio input	—	—
Reasoning	—	✓
Prompt caching	✓	✓
Structured output	✓	✓
Pricing verified	May 7, 2026	May 12, 2026