GLM 5.3 is live on Mistral

Z.ai released GLM 5.3, a third-party open source text model hosted by Mistral, in public preview on September 15, 2026. Mistral serves the model without modifications, targeting long-context coding and agentic workflows with a 1M-token context window and 128k max output. Pricing is $1.4 per million input tokens, $0.14 per million cached input tokens, and $4.4 per million output tokens.

September 15, 2026 Blog https://z.ai/blog/glm-5.3 Public PreviewThird-partyv5.3 Z.ai GLM 5.3 A third-party open source text model from Z.ai, hosted by Mistral for long-context coding and agentic workflows. The model is served without Mistral modifications. Speed Performance Modalities Context 1M Max output 128k Price $1.4 Input/M Tokens $0.14 Cached input/M Tokens $4.4 Output/M Tokens Speed Performance Modalities Context 1M Max output 128k Price $1.4 /M Tokens $0.14 /M Tokens $4.4 /M Tokens Other Models