Claude Opus 4.6 vs Xai Grok 4.1 Fast Reasoning

Name: Xai Grok 4.1 Fast Reasoning
Brand: Google Vertex AI
Price: 0.200000 USD

Claude Opus 4.6 vs Xai Grok 4.1 Fast Reasoning: Xai Grok 4.1 Fast Reasoning is cheaper by 98% on average. Claude Opus 4.6 from Azure AI Foundry (200,000-token context, reasoning, tool calls) vs. Xai Grok 4.1 Fast Reasoning from Google Vertex AI (2,000,000-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

02,000,000

Output tokens / request400

0200,000

Requests / day5,000

01,000,000

Claude Opus 4.6

Azure AI Foundry

$3,805/mo

Input $5.00/M · Output $25.00/M

Xai Grok 4.1 Fast ReasoningCheaper

Google Vertex AI

$122/mo

Input $0.200/M · Output $0.500/M

At this workload, Xai Grok 4.1 Fast Reasoning is 97% cheaper than Claude Opus 4.6 — a savings of $3,683/month ($44,195/year).

Production recipe — Agent Command Center

strategy: cost-optimized
primary:
  model: xai-grok-4-1-fast-reasoning
  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	Xai Grok 4.1 Fast Reasoning Google Vertex AI
Input price	$5.00/M	$0.200/M
Output price	$25.00/M	$0.500/M
Context window	200,000	2,000,000
Max output	128,000	2,000,000
Function calling	✓	✓
Vision	✓	✓
Audio input	—	—
Reasoning	✓	✓
Prompt caching	✓	—
Structured output	✓	✓
Pricing verified	May 12, 2026	May 12, 2026