Gemini 2.5 Pro vs GLM-5.3-Flash
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GLM-5.3-Flash by Zhipu AI wins on 11 of 11 benchmarks against Gemini 2.5 Pro by Google, which leads on 0. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, GLM-5.3-Flash scores 41.9 on AA Intelligence Index compared to Gemini 2.5 Pro's 16.7.
Coding: In coding, GLM-5.3-Flash scores 71.5 on AA Coding Index compared to Gemini 2.5 Pro's 33.3, while GLM-5.3-Flash scores 1310 on Design Arena ELO compared to Gemini 2.5 Pro's 1164, while GLM-5.3-Flash scores 1286 on Website Arena ELO compared to Gemini 2.5 Pro's 1179.
Reasoning: In reasoning, GLM-5.3-Flash scores 85.8% on GPQA Diamond compared to Gemini 2.5 Pro's 79.9%, while GLM-5.3-Flash scores 51.2 on AA Agentic Index compared to Gemini 2.5 Pro's 3.5, while GLM-5.3-Flash scores 75.3% on τ²-Bench Airline compared to Gemini 2.5 Pro's 61.3%.
Context: In context, GLM-5.3-Flash scores 1.3M on Context Length compared to Gemini 2.5 Pro's 1.0M.
Pricing Comparison
Gemini 2.5 Pro costs $1.3/1M input tokens and $10.0/1M output tokens, while GLM-5.3-Flash costs $0.15/1M input and $0.50/1M output. GLM-5.3-Flash is the more affordable option for API usage.
Verdict
GLM-5.3-Flash leads across the board in affordability, making it the stronger overall choice in this comparison.
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Gemini 2.5 Pro vs GLM-5.3-Flash — FAQ
Which is better, Gemini 2.5 Pro or GLM-5.3-Flash?
GLM-5.3-Flash wins on more benchmarks overall (11 vs 0). However, the best choice depends on your specific needs — each model excels in different areas.
How does Gemini 2.5 Pro compare to GLM-5.3-Flash for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Gemini 2.5 Pro cheaper than GLM-5.3-Flash?
Yes, GLM-5.3-Flash is cheaper. Gemini 2.5 Pro costs $1.3/1M input and $10.0/1M output tokens. GLM-5.3-Flash costs $0.15/1M input and $0.50/1M output tokens.
Which is faster, Gemini 2.5 Pro or GLM-5.3-Flash?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the Gemini 2.5 Pro vs GLM-5.3-Flash comparison cover?
This comparison covers 11 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, AA Intelligence Index, AA Coding Index, AA Agentic Index, Cached Input Cost, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.