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Llama 3.1 405B Instruct vs Phi 4 Reasoning Plus
Comprehensive side-by-side LLM comparison
Phi 4 Reasoning Plus leads with 5.7% higher average benchmark score. Llama 3.1 405B Instruct is available on 8 providers. Overall, Phi 4 Reasoning Plus is the stronger choice for coding tasks.
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Meta
Llama 3.1 405B was developed as Meta's largest open-source language model, designed to provide frontier-level capabilities with 405 billion parameters. Built to demonstrate that open-source models can match proprietary systems in capability, it enables researchers and developers to experiment with and deploy a powerful foundation model without licensing restrictions.
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Microsoft
Phi-4 Reasoning Plus was created as an enhanced reasoning variant, designed to provide even deeper analytical capabilities within the Phi-4 family. Built to maximize reasoning quality while maintaining the efficiency benefits of small models, it represents the most capable reasoning-focused option in the Phi-4 series.
9 months newer
Llama 3.1 405B Instruct
Meta
2024-07-23
Phi 4 Reasoning Plus
Microsoft
2025-04-30
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Performance Metrics
Context window and performance specifications
Average performance across 3 common benchmarks
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Llama 3.1 405B Instruct
Average Score:70.9%
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Phi 4 Reasoning Plus
Average Score:76.6%(+5.7%)
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Knowledge Cutoff
Training data recency comparison
Phi 4 Reasoning Plus
2025-03-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Llama 3.1 405B Instruct
8 providers
Bedrock
Throughput: 100 tok/s
Latency: 0.5ms
DeepInfra
Throughput: 27 tok/s
Latency: 0.5ms
Fireworks
Throughput: 78 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
Hyperbolic
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Llama 3.1 405B Instruct
Avg Score:70.9%
Providers:8
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Phi 4 Reasoning Plus
Avg Score:76.6%(+5.7%)
Providers:0