Z.ai: GLM 5.3

Z.AI

zai/glm-5.3

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...

Context

1.31072M

Input /1M

$1.40

Output /1M

$4.40

Latency (TTFT)

3,036ms

Pricing

Per 1M tokens, in USD

Input$1.40

Output$4.40

Cache read$0.26

Specs

text intext out

TokenizerOther

Max output tokens943,718

Supported parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_pparallel_tool_callspresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

Where it ranks on price

Against 157 routable models

Input$1.40

Cheaper than 28% of routable models

Output$4.40

Cheaper than 31% of routable models

Benchmarks

Intelligence44.9

Coding74.8

Agentic53.4

Composite scores (0–100) from Artificial Analysis, via OpenRouter's model catalog.

Call this model

Swap in your Mizan key — the request/response bodies are OpenAI chat-completion shaped.

cURL

curl https://api.app-mizan.com/v1/chat/completions \
  -H "Authorization: Bearer mizan_rt_..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "zai/glm-5.3",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'

Models

Z.ai: GLM 5.3

Z.AI

zai/glm-5.3

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...

Context

1.31072M

Input /1M

$1.40

Output /1M

$4.40

Latency (TTFT)

3,036ms

Pricing

Per 1M tokens, in USD

Input$1.40

Output$4.40

Cache read$0.26

Specs

text intext out

TokenizerOther

Max output tokens943,718

Supported parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_pparallel_tool_callspresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

Where it ranks on price

Against 157 routable models

Input$1.40

Cheaper than 28% of routable models

Output$4.40

Cheaper than 31% of routable models

Benchmarks

Intelligence44.9

Coding74.8

Agentic53.4

Composite scores (0–100) from Artificial Analysis, via OpenRouter's model catalog.

Call this model

Swap in your Mizan key — the request/response bodies are OpenAI chat-completion shaped.

cURL

curl https://api.app-mizan.com/v1/chat/completions \
  -H "Authorization: Bearer mizan_rt_..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "zai/glm-5.3",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'