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Claude Opus 4.8 vs Grok 3

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Anthropic · 1M context | xAI · 128k context

Pricing Comparison

Metric	Claude Opus 4.8	Grok 3
Input / 1M tokens	$5	$3
Output / 1M tokens	$25	$15
Cached input / 1M	$0.5	—
Context window	1M	128k
Provider	Anthropic	xAI

Cost Calculator

Input tokens

Output tokens

Requests/day

💰 Grok 3 saves $2,100.00/month (40% cheaper)

AClaude Opus 4.8

Per request$0.0175

Daily$175.00

Monthly$5,250.00

Yearly$63,875.00

XGrok 3CHEAPER

Per request$0.0105

Daily$105.00

Monthly$3,150.00

Yearly$38,325.00

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Choose Claude Opus 4.8 when…

✓ Larger context window (1M vs 128k) — better for long documents
✓ Supports prompt caching — save up to 90% on repeated prompts
✓ Optimized for: Complex reasoning & coding

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Choose Grok 3 when…

✓ Cheaper for RAG & document retrieval (lower input cost)
✓ 40% cheaper per input token
✓ Cheaper for generation-heavy workloads (lower output cost)
✓ Optimized for: Real-time web research

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