GLM-4.6 vs GPT-5.1
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GLM-4.6 by Zhipu AI wins on 5 of 9 benchmarks against GPT-5.1 by OpenAI, which leads on 4. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, GPT-5.1 scores 49.4 on AA Coding Index compared to GLM-4.6's 45.8, while GLM-4.6 scores 1167 on Design Arena ELO compared to GPT-5.1's 1158, while GLM-4.6 scores 1186 on Website Arena ELO compared to GPT-5.1's 1179.
Reasoning: In reasoning, GPT-5.1 scores 86.2% on GPQA Diamond compared to GLM-4.6's 78.6%, while GPT-5.1 scores 75.7% on τ²-Bench Airline compared to GLM-4.6's 65.6%.
Context: In context, GPT-5.1 scores 400K on Context Length compared to GLM-4.6's 205K.
Pricing Comparison
GLM-4.6 costs $0.43/1M input tokens and $1.8/1M output tokens, while GPT-5.1 costs $1.3/1M input and $10.0/1M output. GLM-4.6 is the more affordable option for API usage.
Verdict
GLM-4.6 leads across the board in affordability, making it the stronger overall choice in this comparison.
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GLM-4.6 vs GPT-5.1 — FAQ
Which is better, GLM-4.6 or GPT-5.1?
GLM-4.6 wins on more benchmarks overall (5 vs 4). However, the best choice depends on your specific needs — each model excels in different areas.
How does GLM-4.6 compare to GPT-5.1 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is GLM-4.6 cheaper than GPT-5.1?
Yes, GLM-4.6 is cheaper. GLM-4.6 costs $0.43/1M input and $1.8/1M output tokens. GPT-5.1 costs $1.3/1M input and $10.0/1M output tokens.
Which is faster, GLM-4.6 or GPT-5.1?
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 GLM-4.6 vs GPT-5.1 comparison cover?
This comparison covers 9 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, AA Coding Index, Cached Input Cost, Design Arena ELO, τ²-Bench Airline, and more. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.