Claude 3 Sonnet vs GLM-4-Flash

Performance benchmarks + pricing comparison — updated April 2026

Claude 3 Sonnet

Anthropic

First generation Sonnet. Balanced performance for general tasks.

Input	$3.00/M
Output	$15.00/M
Context	200K tokens
Best For	General-purpose coding and reasoning
Benchmark	65/100

Zhipu AI

Zhipu AI's ultra-cheap model. Near-free pricing for high-volume Chinese and English text tasks.

Input	$0.010/M
Output	$0.010/M
Context	128K tokens
Best For	High-volume text processing, Chinese NLP tasks

Estimated cost per project with 30% cache hit rate. Actual costs may vary based on usage patterns.

Scenario	Claude 3 Sonnet	GLM-4-Flash	Savings
Small Script (1K lines)	$0.55	<$0.01	GLM-4-Flash saves $0.55 (100%)
Medium Feature (10K lines)	$4.05	<$0.01	GLM-4-Flash saves $4.04 (100%)
Large Project (50K lines)	$20.25	$0.03	GLM-4-Flash saves $20.22 (100%)
Code Review (5K lines)	$0.90	<$0.01	GLM-4-Flash saves $0.90 (100%)

GLM-4-Flash wins on both price and performance — $0.010/M input with a benchmark score of N/A/100.

For most developers, this is the clear choice between these two models.

Anthropic's balanced model for coding and general tasks. Best price-performance ratio in the Claude family.

Anthropic's most powerful model. Best for complex reasoning and challenging coding tasks.

Previous generation Sonnet. Still excellent for coding tasks at the same price point.

Fast, cost-effective model for high-volume tasks. Great for code review and simple queries.

First generation Opus. Highest reasoning capability in the Claude 3 family.

Cheapest Claude model. Fast responses for simple tasks and basic coding.