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    Google · OpenAI

    Gemini 3.5 Flash vs GPT-5.5 Pro

    Compare Gemini 3.5 Flash (Google) and GPT-5.5 Pro (OpenAI) on benchmarks, capabilities, and pricing.

    At a glance

    Gemini 3.5 FlashGPT-5.5 Pro
    ProviderGoogleOpenAI
    Context1M tokens1M tokens
    ModalityMultimodalMultimodal
    PricingProMax
    SpeedFastSlow
    ReasoningExpertExpert

    Benchmarks

    Gemini 3.5 Flash

    AA Intelligence Index
    33points
    Artificial Analysis · Date unknownAge unknown
    Output speed
    225tokens/s
    Artificial Analysis · As of Aug 11, 2026Stale · 31d old
    API input cost
    $1.50/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    API output cost
    $9.00/ 1M tokens
    Artificial Analysis · Date unknownAge unknown
    Context window
    1M
    Catalog · As of Aug 11, 2026Stale · 31d old

    Benchmark variant: Gemini 3.5 Flash (high)

    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

    Try both on yno.ai

    Switch between Gemini 3.5 Flash and GPT-5.5 Pro per task with one account.

    Frequently asked

    Which is faster, Gemini 3.5 Flash or GPT-5.5 Pro?
    Gemini 3.5 Flash is rated fast 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, Gemini 3.5 Flash or GPT-5.5 Pro?
    Gemini 3.5 Flash is on the pro 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 Real-time apps?
    Both models support Real-time apps. Gemini 3.5 Flash brings Function calling and code execution; 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 Gemini 3.5 Flash 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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