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K = 0.731
All model prices

GLM-5.3 vs GPT-6 Astra API pricing

For a chat message (1K input, 500 output), GLM-5.3 costs $0.000779 per request and GPT-6 Astra costs $0.035, so GLM-5.3 is about 45× cheaper.

On the overall leaderboard GLM-5.3 ranks #15 and GPT-6 Astra ranks #2.

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 tokensGLM-5.3GPT-6 Astra
Input$0.079$10
Output$1.4$50
Cached input$0.078$1
ProviderZ.aiOpenAI
Release date2026-08-182026-09-03
Overall rank#15#2
Coding rank#24#2
Reasoning rank#29#2
Knowledge rank—#2
Professional work rank#14#8
Verified2026-10-192026-10-19
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageGLM-5.3GPT-6 AstraDifference
Chat message1K in / 500 out$0.000779$0.78 per 1,000$0.035$35 per 1,000GLM-5.3 is 45× cheaper
Long document100K in / 2K out$0.0107$10.7 per 1,000$1.1$1,100 per 1,000GLM-5.3 is 103× cheaper
Agent session500K in / 50K out$0.11$109.5 per 1,000$7.5$7,500 per 1,000GLM-5.3 is 68× cheaper

More price comparisons

GLM-5.3 vs other models

GPT-6 Astra vs other models