Llama 3.3 70B Review: Best Open-Source Model of Late 2025?

Meta's Llama 3.3 70B dropped in late 2025 and immediately became the go-to locally-runnable model for users with 2x RTX 4090 setups or Mac Ultra systems. At 70B parameters with instruction fine-tuning, it delivers GPT-4-class performance on most benchmarks. Here is an honest review.

Llama 3.3 70B Specifications

SpecValue
Parameters70.6B
ArchitectureDense transformer
Context Window128K tokens
VRAM (Q4_K_M)~42 GB
LicenseLlama 3.3 Community

Setup on 2x RTX 4090

huggingface-cli download bartowski/Llama-3.3-70B-Instruct-GGUF   --include "*Q4_K_M*"   --local-dir ./models/llama3.3-70b

./build/bin/llama-server   -m ./models/llama3.3-70b/Llama-3.3-70B-Instruct-Q4_K_M.gguf   --n-gpu-layers 999   --tensor-split 1,1   --flash-attn   --ctx-size 32768   --host 0.0.0.0 --port 8080

Benchmark vs Competition

ModelMMLUHumanEvalVRAM
Llama 3.3 70B88.689.442 GB
GPT-4o (cloud)88.790.2N/A
Qwen3.6 32B89.292.120 GB
DeepSeek-R1 32B87.188.020 GB

For hardware recommendations to run Llama 3.3 70B, check the dedicated guide at LLMHardware.io's 70B hardware page.

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