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GoogleGemini 2.5 FlashVSZ.ai (Zhipu AI)GLM-4.5

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

Our Take

We recommend GLM-4.5 for its clear benchmark advantage, or the 1.2x cheaper Gemini 2.5 Flash only if your budget requires optimizing costs for very high-volume pipelines. While GLM-4.5 offers superior reasoning and coding, it carries a moderate price premium. Choose GLM-4.5 for quality, or Gemini 2.5 Flash for cost optimization.
▶WHY?
Benchmark Calculations & Evidence:
  • Coding Benchmarks: Both models were evaluated on the SWE-bench Verified benchmark. GLM-4.5 scored 64.2%, while Gemini 2.5 Flash scored 60.4%.
  • Reasoning Benchmarks: Both models were evaluated on the GPQA Diamond benchmark. GLM-4.5 scored 79.9%, while Gemini 2.5 Flash scored 68.3%.
  • Cost Efficiency: Gemini 2.5 Flash pricing ($0.3/M input, $2.5/M output) is 1.2x cheaper than GLM-4.5 ($0.6/M input, $2.2/M output).
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    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)1.2x cheaper
    $0.85Input: $0.30 | Output: $2.50
    Context WindowLarger
    1.05M tokens
    Model Specs

    GLM-4.5

    Open SourceAPI Available
    Website🤗HF

    Benchmarks & Scores

    Coding (swe-bench-verified)Winner (+3.8%)
    64.2%

    multi-file code and clearly defined tasks

    Reasoning (gpqa-diamond)Winner (+11.6%)
    79.9%

    graduate-level science QA

    Cost & Context

    Cost (per 1M tokens)
    $1.00Input: $0.60 | Output: $2.20
    Context Window
    131.07k tokens
    Read our data collection methodology

    Frequently Asked Questions about Gemini 2.5 Flash vs GLM-4.5

    Gemini 2.5 Flash is cheaper than GLM-4.5. Gemini 2.5 Flash has a blended cost of $0.85/1M tokens, which is about 1.2x cheaper than GLM-4.5 at $1.00/1M tokens.

    GLM-4.5 is better for coding tasks on this benchmark. It scores 64.2% on swe-bench-verified (multi-file code and clearly defined tasks) compared to Gemini 2.5 Flash which scores 60.4%.

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