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    DeepSeek · OpenAI

    DeepSeek V4 Pro vs GPT-5.5 Pro

    Compare DeepSeek V4 Pro (DeepSeek) and GPT-5.5 Pro (OpenAI) on benchmarks, capabilities, and pricing.

    At a glance

    DeepSeek V4 ProGPT-5.5 Pro
    ProviderDeepSeekOpenAI
    Context1M tokens1M tokens
    ModalityText onlyMultimodal
    PricingMaxMax
    SpeedMediumSlow
    ReasoningExpertExpert

    Benchmarks

    DeepSeek V4 Pro

    AA Intelligence Index
    36.3points
    Artificial Analysis · Date unknownAge unknown
    Output speed
    69.68tokens/s
    Configuration: Prompt length: 1,000 · Parallel queries: 1
    Artificial Analysis · Date unknownAge unknown
    API input cost
    $1.32/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    API output cost
    $3.96/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    Context window
    1M
    Catalog · As of Aug 13, 2026Within 30d

    Benchmark variant: DeepSeek V4 Pro 0813 (Reasoning, Max Effort)

    AA data retrieved Sep 11, 2026 · Artificial Analysis

    GPT-5.5 Pro

    AA Intelligence Index
    57points
    Estimated · As of Aug 11, 2026Stale · 31d old
    Output speed
    78tokens/s
    Estimated · As of Aug 11, 2026Stale · 31d old
    API input cost
    $0.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    API output cost
    $0.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    Context window
    1M
    Estimated · As of Aug 11, 2026Stale · 31d old

    Benchmark variant: GPT-5.5 Pro (xhigh)

    AA data retrieved Sep 11, 2026 · Artificial Analysis

    When to pick DeepSeek V4 Pro

    Pick DeepSeek V4 Pro when your deployment story requires open weights inside a private cluster, on-prem hardware, or air-gapped environments. It suits public-sector projects, EU data-residency contracts, and teams customizing through full fine-tuning rather than prompt engineering. A practical choice when audit trails demand visibility into the model artifact itself.

    When to pick GPT-5.5 Pro

    Pick GPT-5.5 Pro when you want OpenAI's hosted stack with mature SDK ecosystems, broad third-party integrations, and the Assistants and Realtime APIs out of the box. It fits teams already building on Azure or OpenAI directly, multimodal applications spanning voice and vision, and product roadmaps that lean on frequent platform feature releases.

    Try both on yno.ai

    Switch between DeepSeek V4 Pro and GPT-5.5 Pro per task with one account.

    Frequently asked

    Which is faster, DeepSeek V4 Pro or GPT-5.5 Pro?
    DeepSeek V4 Pro is rated medium and GPT-5.5 Pro is rated slow. yno.ai surfaces output-speed scores from Artificial Analysis on each model's detail page so you can compare exact tokens-per-second figures for your workload.
    Which is cheaper, DeepSeek V4 Pro or GPT-5.5 Pro?
    DeepSeek V4 Pro is on the max tier in yno.ai; GPT-5.5 Pro is on the max tier. See the pricing page for the latest per-tier limits.
    Which is better for Complex coding?
    Both models support Complex coding. DeepSeek V4 Pro brings 1M context; GPT-5.5 Pro brings Additional reasoning compute. Run a side-by-side eval on your prompts in yno.ai to see which fits your workload.
    Can I use both DeepSeek V4 Pro and GPT-5.5 Pro in yno.ai?
    Yes. Both are available on yno.ai under your single account; you can route different stages of an agent to different models or A/B test them on the same prompt without per-provider boilerplate.

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