Claude Opus 4.6 vs Gemini 2.5 Flash

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

Claude Opus 4.6 vs Gemini 2.5 Flash: Gemini 2.5 Flash is cheaper by 94% on average. Claude Opus 4.6 from Azure AI Foundry (200,000-token context, reasoning, 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

0128,000

Requests / day5,000

01,000,000

Claude Opus 4.6

Azure AI Foundry

$3,805/mo

Input $5.00/M · Output $25.00/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 92% cheaper than Claude Opus 4.6 — a savings of $3,516/month ($42,186/year).

Production recipe — Agent Command Center

strategy: cost-optimized
primary:
  model: gemini-2-5-flash
  provider: vertex-ai
fallback:
  model: claude-opus-4-6
  provider: azure-ai-foundry
shadow: { sample_rate: 0.05 }   # mirror 5% of traffic to compare quality live

Get started free →Routing docs ↗

	Claude Opus 4.6 Azure AI Foundry	Gemini 2.5 Flash Google Vertex AI
Input price	$5.00/M	$0.300/M
Output price	$25.00/M	$2.50/M
Context window	200,000	1,048,576
Max output	128,000	65,535
Function calling	✓	✓
Vision	✓	✓
Audio input	—	—
Reasoning	✓	✓
Prompt caching	✓	✓
Structured output	✓	✓
Pricing verified	May 12, 2026	May 12, 2026