GPT-6.1 Sol Pro vs GLM 5.3 Prime
API pricing, context, and independently measured performance, side by side. GPT-6.1 Sol Pro starts 29% cheaper on input than GLM 5.3 Prime at list prices.
GPT-6.1 Sol Pro
OpenAI · released Sep 29, 2026
Best input$2.00 / MTok
Best output$10.00 / MTok
Context1.05M
Providers6
Fastest measured—
VisionToolsReasoningStructured outputPrompt caching
GLM 5.3 Prime
Z.ai · released Sep 23, 2026
Best input$2.80 / MTok
Best output$8.80 / MTok
Context1M
Providers1
Fastest measured—
ToolsReasoningStructured outputPrompt caching
Cheapest providers, measuredUSD / MTOK
| MODEL | PROVIDER | INPUT | OUTPUT | TTFT | TPS | SMOKE |
|---|---|---|---|---|---|---|
| GPT-6.1 Sol Pro |  Azure | $2.00 | $10.00 | — | — | — |
| GPT-6.1 Sol Pro |  OpenAI | $2.00 | $10.00 | — | — | — |
| GLM 5.3 Prime |  Alibaba | $2.80 | $8.80 | — | — | — |