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Alibaba Cloud (Qwen)Qwen3.6-PlusVSGoogleGemini 2.5 Flash

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

Our Take

We recommend Qwen3.6-Plus for complex complex codebases, multi-file repositories, and architectural planning, or the 1.3x cheaper Gemini 2.5 Flash if your budget requires optimizing costs for very high-volume pipelines. While Qwen3.6-Plus offers a clear reasoning advantage, it carries a moderate price premium. Choose Qwen3.6-Plus for architectural codebase planning, or Gemini 2.5 Flash to save on API costs for simple scripts.
▶WHY?
Benchmark Calculations & Evidence:
  • Coding Evaluation: Qwen3.6-Plus was evaluated on SWE-bench Pro (scoring 56.6%), while Gemini 2.5 Flash was evaluated on SWE-bench Verified (scoring 60.4%).
  • Reasoning Accuracy: Both models were evaluated on the GPQA Diamond benchmark. Qwen3.6-Plus scored 90.4%, while Gemini 2.5 Flash scored 68.3%.
  • Cost Efficiency: Gemini 2.5 Flash pricing ($0.3/M input, $2.5/M output) is 1.3x cheaper than Qwen3.6-Plus ($0.5/M input, $3/M output).
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    Model Specs

    Qwen3.6-Plus

    Website

    Benchmarks & Scores

    Coding (swe-bench-pro)
    56.6%

    complex codebases, multi-file repositories, and architectural planning

    Reasoning (gpqa-diamond)Winner (+22.1%)
    90.4%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)
    $1.13Input: $0.50 | Output: $3.00
    Context Window
    1.05M tokens
    Model Specs

    Gemini 2.5 Flash

    Website

    Benchmarks & Scores

    Coding (swe-bench-verified)
    60.4%

    multi-file code and clearly defined tasks

    Reasoning (gpqa-diamond)
    68.3%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)1.3x cheaper
    $0.85Input: $0.30 | Output: $2.50
    Context Window
    1.05M tokens
    Read our data collection methodology

    Frequently Asked Questions about Qwen3.6-Plus vs Gemini 2.5 Flash

    Gemini 2.5 Flash is cheaper than Qwen3.6-Plus. Gemini 2.5 Flash has a blended cost of $0.85/1M tokens, which is about 1.3x cheaper than Qwen3.6-Plus at $1.13/1M tokens.

    For coding tasks, Qwen3.6-Plus scores 56.6% on swe-bench-pro (complex codebases, multi-file repositories, and architectural planning), while Gemini 2.5 Flash scores 60.4% on swe-bench-verified (multi-file code and clearly defined tasks).

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