GLM-5.3: specs, pricing and how it performs in a council

GLM-5.3 is Z.ai's model available on Council AI at $1.40 per million input tokens and $4.40 per million output, with a 1,048,576-token context window. Z.ai reasoning model for complex software engineering and long-horizon agent work (Aug 18, 2026). Largest agentic gain of the month — Terminal-Bench 3.0 from 4.6 to 28.3 over GLM-5.2. 1M context, text only. On Council you do not run it alone: the same prompt goes to up to 10 models from different labs in parallel, and a moderator synthesizes one answer with a consensus score showing where the labs agreed.

GLM-5.3 specifications

What GLM-5.3 is good at

Z.ai reasoning model for complex software engineering and long-horizon agent work (Aug 18, 2026). Largest agentic gain of the month — Terminal-Bench 3.0 from 4.6 to 28.3 over GLM-5.2. 1M context, text only.

Council surfaces it for: reasoning, coding, agents.

It has no native web search. Council can still retrieve context for it from your own document library on Ultra.

GLM-5.3 pricing on Council AI

Council does not resell tokens. Every paid plan carries a monthly budget and each model draws against it at cost: $1.40 in / $4.40 out per million tokens for GLM-5.3. Plans start at $19.99/mo (Plus), $39.99/mo (Pro) and $99.99/mo (Ultra, which adds the personal RAG library and MCP server).

If budget is the binding constraint, Grok 4.3 is the cheaper seat in the lineup at $1.25/$2.50.

Using GLM-5.3 in a council

A single model — this one included — can be confidently wrong. Council runs GLM-5.3 alongside models from other labs on the same prompt, then scores how much they agreed. High consensus is a signal you can act on the answer; low consensus surfaces the specific point they split on, which is usually the part worth checking yourself.

Other Z.ai models in the lineup: GLM-5.2.

Frequently asked questions