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DeepSeekDeepSeek V4 FlashVSGoogleGemini 3.1 Flash-Lite

Analysis by:the whichllmmodel Editorial Team|Updated: June 2026

Our Take

We recommend Gemini 3.1 Flash-Lite if you need peak intelligence for complex scripting single-file apps or clearly defined functions, or the 3.2x cheaper DeepSeek V4 Flash if your workflow is limited to complex codebases, multi-file repositories, and architectural planning. While Gemini 3.1 Flash-Lite holds a major reasoning advantage, DeepSeek V4 Flash is optimized for high-volume budget pipelines. Choose Gemini 3.1 Flash-Lite for scripting single-file apps or clearly defined functions, or DeepSeek V4 Flash to maximize your budget for basic scripts.
▶WHY?
Benchmark Calculations & Evidence:
  • Coding Evaluation: DeepSeek V4 Flash was evaluated on SWE-bench Pro (scoring 49.1%), while Gemini 3.1 Flash-Lite was evaluated on LiveCodeBench (scoring 72%).
  • Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. Gemini 3.1 Flash-Lite scored 82.2%, while DeepSeek V4 Flash scored 80%.
  • Cost Efficiency: DeepSeek V4 Flash pricing ($0.14/M input, $0.28/M output) is 3.2x cheaper than Gemini 3.1 Flash-Lite ($0.25/M input, $1.5/M output).
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    Model Specs

    DeepSeek V4 Flash

    Open SourceAPI Available
    Website🤗HF

    Benchmarks & Scores

    Coding (swe-bench-pro)
    49.1%

    complex codebases, multi-file repositories, and architectural planning

    Reasoning (gpqa-diamond)
    80%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)3.2x cheaper
    $0.17Input: $0.14 | Output: $0.28
    Context Window
    1.05M tokens
    Model Specs

    Gemini 3.1 Flash-Lite

    Website

    Benchmarks & Scores

    Coding (live-code-bench)
    72%

    scripting single-file apps or clearly defined functions

    Reasoning (gpqa-diamond)Winner (+2.2%)
    82.2%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)
    $0.56Input: $0.25 | Output: $1.50
    Context Window
    1.05M tokens
    Read our data collection methodology

    Frequently Asked Questions about DeepSeek V4 Flash vs Gemini 3.1 Flash-Lite

    DeepSeek V4 Flash is cheaper than Gemini 3.1 Flash-Lite. DeepSeek V4 Flash has a blended cost of $0.17/1M tokens, which is about 3.2x cheaper than Gemini 3.1 Flash-Lite at $0.56/1M tokens.

    For coding tasks, DeepSeek V4 Flash scores 49.1% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning), while Gemini 3.1 Flash-Lite scores 72% on live-code-bench (scripting single-file apps or clearly defined functions).

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