Which model is better: Claude 3.5 Sonnet or GLM-5.3-Flash?
GLM-5.3-Flash is 96.0% cheaper for input tokens ($0.12 vs. $3.00 per 1M tokens) and $0.40 vs. $15.00 for output tokens (25.0x cost advantage). In terms of operational performance, GLM-5.3-Flash delivers lower response latency at 90ms TTFT (220ms faster than Claude 3.5 Sonnet) with 175 vs. 80 tok/s throughput. GLM-5.3-Flash leads coding evaluations at 52.8% SWE-bench Verified vs. 49.0% for Claude 3.5 Sonnet and 63.5% vs. 59.4% on GPQA Diamond.
Verified daily via automated API latency tests and official documentation.
Zero-Shot RAG Verified
Verified Performance & Unit Economics Delta (12 Dimensions)
Daily synchronized metrics across token pricing, prompt cache economics, latency, throughput, and 5 capability benchmarks.
Metric / Dimension
Claude 3.5 Sonnet
GLM-5.3-Flash
Net Delta / Advantage
Input Cost / 1M Tokens
$3.00
$0.12
GLM-5.3-Flash is 25.0x cheaper
Output Cost / 1M Tokens
$15.00
$0.40
GLM-5.3-Flash (97.3% lower)
Prompt Cache Read / 1M
$0.300
$0.030
GLM-5.3-Flash is 10.0x cheaper
Prompt Cache Write / 1M
$3.75
$0.12
GLM-5.3-Flash is 31.3x cheaper
Context Window (Max Output)
205k (8k out)
262k (16k out)
GLM-5.3-Flash (1.3x larger context)
Avg TTFT Response Latency
310ms
90ms
GLM-5.3-Flash (220ms faster)
Generation Speed (Throughput)
80 tok/s
175 tok/s
GLM-5.3-Flash (+95 tok/s faster)
SWE-bench Verified (Coding)
49%
52.8%
GLM-5.3-Flash (+3.8% lead)
GPQA Diamond (PhD STEM)
59.4%
63.5%
GLM-5.3-Flash (+4.1% lead)
MMLU-Pro (Multi-Discipline)
78%
78.4%
GLM-5.3-Flash (+0.4% lead)
MATH-500 (Quantitative Logic)
78.3%
84%
GLM-5.3-Flash (+5.7% lead)
Inference Value Score (IVR)
46.2 / 100
76.7 / 100
GLM-5.3-Flash (+30.5 pts)
Interactive Monthly Token Economics & ROI Forecaster
Model production workloads across prompt, completion, and cached context tokens, or switch models on the fly.
Choose GLM-5.3-Flash (Zhipu AI) for sub-100ms ultra-fast inference model designed for real-time customer support, document classification, and agentic workflows — offering a 262k context window, 90ms TTFT, and $0.12/1M input pricing ($0.030/1M cached reads).
Which is cheaper: Claude 3.5 Sonnet or GLM-5.3-Flash?
GLM-5.3-Flash is cheaper at $0.12/1M input tokens ($0.40/1M output) compared to $3.00/1M input ($15.00/1M output) for Claude 3.5 Sonnet.
Which model has lower TTFT latency and higher tok/s throughput: Claude 3.5 Sonnet or GLM-5.3-Flash?
GLM-5.3-Flash delivers faster first-token latency at 90ms TTFT (175 tok/s throughput) compared to 310ms TTFT (80 tok/s) for Claude 3.5 Sonnet.
How do Claude 3.5 Sonnet and GLM-5.3-Flash compare on SWE-bench coding and GPQA Diamond reasoning?
On SWE-bench Verified software engineering, Claude 3.5 Sonnet scores 49% versus 52.8% for GLM-5.3-Flash. On GPQA Diamond graduate-level STEM reasoning, Claude 3.5 Sonnet scores 59.4% versus 63.5% for GLM-5.3-Flash (and 78.3% vs 84% on MATH-500).
When should you choose Claude 3.5 Sonnet?
Choose Claude 3.5 Sonnet (Anthropic) for legacy enterprise workflows, code review pipelines, and human-like content generation — offering a 204k context window, 310ms TTFT, and $3.00/1M input pricing ($0.300/1M cached reads).
When should you choose GLM-5.3-Flash?
Choose GLM-5.3-Flash (Zhipu AI) for sub-100ms ultra-fast inference model designed for real-time customer support, document classification, and agentic workflows — offering a 262k context window, 90ms TTFT, and $0.12/1M input pricing ($0.030/1M cached reads).
