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DeepSeekDeepSeek V4 ProVSGoogleGemini 3 Flash

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

Our Take

We recommend Gemini 3 Flash for superior overall value and reasoning capabilities, as it is cheaper or equal in cost while delivering peak intelligence. While Gemini 3 Flash excels at complex multi-file code and clearly defined tasks, DeepSeek V4 Pro is suited for scripting complex codebases, multi-file repositories, and architectural planning. Choose Gemini 3 Flash for multi-file code and clearly defined tasks, or DeepSeek V4 Pro if you specifically require its simpler functions profile.
▶WHY?
Benchmark Calculations & Evidence:
  • Coding Evaluation: DeepSeek V4 Pro was evaluated on SWE-bench Pro (scoring 52.1%), while Gemini 3 Flash was evaluated on SWE-bench Verified (scoring 78%).
  • Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. Gemini 3 Flash scored 90.4%, while DeepSeek V4 Pro scored 88%.
  • Cost Efficiency: DeepSeek V4 Pro pricing ($1.74/M input, $3.48/M output) is 0.5x cheaper than Gemini 3 Flash ($0.5/M input, $3/M output).
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    Model Specs

    DeepSeek V4 Pro

    Open SourceAPI Available
    Website🤗HF

    Benchmarks & Scores

    Coding (swe-bench-pro)
    52.1%

    complex codebases, multi-file repositories, and architectural planning

    Reasoning (gpqa-diamond)
    88%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)
    $2.17Input: $1.74 | Output: $3.48
    Context Window
    1.05M tokens
    Model Specs

    Gemini 3 Flash

    Website

    Benchmarks & Scores

    Coding (swe-bench-verified)
    78%

    multi-file code and clearly defined tasks

    Reasoning (gpqa-diamond)Winner (+2.4%)
    90.4%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)1.9x cheaper
    $1.13Input: $0.50 | Output: $3.00
    Context Window
    1.05M tokens
    Read our data collection methodology

    Frequently Asked Questions about DeepSeek V4 Pro vs Gemini 3 Flash

    Gemini 3 Flash is cheaper than DeepSeek V4 Pro. Gemini 3 Flash has a blended cost of $1.13/1M tokens, which is about 1.9x cheaper than DeepSeek V4 Pro at $2.17/1M tokens.

    For coding tasks, DeepSeek V4 Pro scores 52.1% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning), while Gemini 3 Flash scores 78% on swe-bench-verified (multi-file code and clearly defined tasks).

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