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    Side-by-Side Comparison

    Llama 3.1 405b vs gpt-5.3-instant

    A detailed comparison of pricing, specifications, and benchmark performance.

    ReplicateLlama 3.1 405bReplicate
    vs
    OpenAIgpt-5.3-instantOpenAI
    Metric
    Llama 3.1 405b
    gpt-5.3-instant
    Provider
    Provider
    Replicate
    OpenAI
    License
    Open Source
    Proprietary
    Release Date
    2024-07-23
    2026-03-03
    Pricing (per 1M tokens)
    Input Price+443%
    $9.50
    $1.75
    Output Price-32%
    $9.50
    $14.00
    Blended (1M + 1M)
    $19.00
    $15.75
    Model Details
    Context Window
    128K
    128K
    Max Output Tokens
    2
    16.4K
    Knowledge Cutoff
    December 2023
    August 2025
    Throughput
    N/A
    N/A
    Benchmarks
    MMLU
    85.2%
    N/A
    MATH
    73.8%
    N/A

    Verdict

    The Bottom Line

    Both models are closely matched on benchmarks. gpt-5.3-instant has the pricing advantage, making it the better value unless Llama 3.1 405b's specific capabilities are critical to your workflow.

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    ← View Llama 3.1 405b DetailsBrowse All Models →

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