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GLM 5.3

Open weights by Z.ai

Z.ai's flagship, with the highest Intelligence Index among our production models. Reach for it on complex, long-horizon coding when GLM 5.3 Flash falls short. It reads text only; when complex work involves images, use Kimi K3.

Get an API keyLive status
Price per 1M tokens
$1.40 in$4.40 out
$0.26 cache read
Context
1M
128K max output
Parameters
744B
40B active
Weights
FP8
Official release
  • Text only
  • Tool calling
  • Reasoning always on, default max

How it ranks

Against every model we serve, best first. Starred scores are reported by the publisher on its model card; the rest are independent measurements. About the scores

Artificial Analysis Intelligence Indexby Artificial Analysis
  1. GLM 5.345
  2. Kimi K344
  3. GLM 5.3 Flash42
  4. DeepSeek V4.1 Flash39
  5. DeepSeek V4 Flash34
  6. Qwen3.6 35B A3B18
DeepSWEby Datacurve
  1. DeepSeek V4.1 Flash74.2%* reported by the publisher
  2. GLM 5.369%
  3. Kimi K368.5%
  4. GLM 5.3 Flash63.4%
  5. DeepSeek V4 Flash54.4%* reported by the publisher

Not published: Qwen3.6 35B A3B.

Terminal-Bench 2.1by tbench.ai
  1. DeepSeek V4.1 Flash90.6%* reported by the publisher
  2. Kimi K385%
  3. GLM 5.3 Flash84.3%
  4. GLM 5.383.9%
  5. DeepSeek V4 Flash78.7%
  6. Qwen3.6 35B A3B44.9%
  • Artificial Analysis Intelligence Index for GLM 5.3: independent measurement. Source
  • DeepSWE for GLM 5.3: independent measurement. Source
  • Terminal-Bench 2.1 for GLM 5.3: independent measurement. Source

Pricing

Input
$1.40 per 1M tokens
Output
$4.40 per 1M tokens
Cache read
$0.26 per 1M tokens

See all prices

Specs

Context window
1M tokens
Max output
128K tokens
Parameters
744B total, 40B active per token
Vision
No, text only
Tool calling
Yes
Reasoning
Always on (low, high, max)
Default effort
max
Weights
FP8, official release
In production since
August 29, 2026

Quickstart

Pick your tool; the command already carries this model's id. More tools (Pi, Copilot, Zed, omp) in the setup guides.

OpenCode
Built in
Launch OpenCode on this model with the umans CLI. Umans AI is also built into OpenCode: run /connect and pick it.
Terminal
curl -fsSL https://api.code.umans.ai/cli/install.sh | bash   # once
umans opencode --model umans-glm-5.3
Full setup in the docs

Or consider

GLM 5.3 API: pricing, context and benchmarks · Umans AI