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Llama 3.1 405B vs Grok 3

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Meta · 128k context | xAI · 128k context

Pricing Comparison

Metric	Llama 3.1 405B	Grok 3
Input / 1M tokens	$3.5	$3
Output / 1M tokens	$3.5	$15
Cached input / 1M	—	—
Context window	128k	128k
Provider	Meta	xAI

Cost Calculator

Input tokens

Output tokens

Requests/day

💰 Llama 3.1 405B saves $1,575.00/month (50% cheaper)

LLlama 3.1 405BCHEAPER

Per request$0.005250

Daily$52.50

Monthly$1,575.00

Yearly$19,162.50

XGrok 3

Per request$0.0105

Daily$105.00

Monthly$3,150.00

Yearly$38,325.00

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Choose Llama 3.1 405B when…

✓ Cheaper for generation-heavy workloads (lower output cost)
✓ Optimized for: Max open-source performance

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Choose Grok 3 when…

✓ Cheaper for RAG & document retrieval (lower input cost)
✓ 14% cheaper per input token
✓ Larger context window (128k vs 128k) — better for long documents
✓ Optimized for: Real-time web research

Related Comparisons

Llama 3.1 405B vs Llama 4 Maverick Llama 3.1 405B vs Llama 4 Scout Llama 3.1 405B vs Llama 3.3 70B Llama 3.1 405B vs Llama 3.1 8B Grok 3 vs Llama 4 Maverick Grok 3 vs Llama 4 Scout