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K = 0.731
All model prices

Claude Sonnet 5.5 vs GLM-5.3 API pricing

For a chat message (1K input, 500 output), GLM-5.3 costs $0.000779 per request and Claude Sonnet 5.5 costs $0.007, so GLM-5.3 is about 9× cheaper.

On the overall leaderboard Claude Sonnet 5.5 ranks #8 and GLM-5.3 ranks #15.

Prices are the standard pay-as-you-go prices in OpenRouter's public model list, with input at the cache-miss price. Models OpenRouter does not list use the vendor's official price; those listed in CNY are converted to USD at this round's exchange rate.

Work it out for your own usageSee the model leaderboard

Prices and rankings

USD per million tokensClaude Sonnet 5.5GLM-5.3
Input$2$0.079
Output$10$1.4
Cached input$0.1$0.078
ProviderAnthropicZ.ai
Release date—2026-08-18
Overall rank#8#15
Coding rank#12#24
Reasoning rank#6#29
Knowledge rank#30—
Professional work rank#2#14
Verified2026-10-192026-10-19
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageClaude Sonnet 5.5GLM-5.3Difference
Chat message1K in / 500 out$0.007$7 per 1,000$0.000779$0.78 per 1,000GLM-5.3 is 9× cheaper
Long document100K in / 2K out$0.22$220 per 1,000$0.0107$10.7 per 1,000GLM-5.3 is 21× cheaper
Agent session500K in / 50K out$1.5$1,500 per 1,000$0.11$109.5 per 1,000GLM-5.3 is 14× cheaper

More price comparisons

Claude Sonnet 5.5 vs other models

GLM-5.3 vs other models