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Llama 3.1 405B vs Llama 4 Behemoth

Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.

Benchmark data for one or both models is coming soon. This page currently shows metadata and pricing where BenchLM has it, and score-level comparisons will populate as public benchmark results land.

Llama 3.1 405B

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VS

Llama 4 Behemoth

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0 categoriesvs0 categories

Benchmark data for Llama 3.1 405B and Llama 4 Behemoth is coming soon on BenchLM.

Category Radar

Operational Comparison

Llama 3.1 405B

Llama 4 Behemoth

Price (per 1M tokens)

$0 / $0

$0 / $0

Speed

29 t/s

N/A

Latency (TTFT)

2.19s

N/A

Context Window

128K

32K

Quick Verdict

Benchmark data for Llama 3.1 405B and Llama 4 Behemoth is coming soon on BenchLM.

BenchLM does not have sourced benchmark coverage for Llama 3.1 405B and Llama 4 Behemoth yet. This comparison is currently limited to metadata such as context window, reasoning mode, and pricing where available.

Llama 3.1 405B has the larger context window at 128K, compared with 32K for Llama 4 Behemoth.

Benchmark Deep Dive

Frequently Asked Questions (3)

Can I compare Llama 3.1 405B and Llama 4 Behemoth on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.

Why does this comparison show “coming soon”?

BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.

What data is available for Llama 3.1 405B and Llama 4 Behemoth today?

Llama 3.1 405B: $0.00 input / $0.00 output per 1M tokens Llama 4 Behemoth: $0.00 input / $0.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.

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Last updated: April 20, 2026

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