Z.ai: GLM 5.3 Flash (Free) is a 1,048,576-token model free on Composite. Ranked #1 of 179 models by traffic on Composite over the last 30 days, taking 41.19% of tokens and 40.1% of requests. 88% positive from 17 votes by Composite users who have run requests through the platform. Measured on Composite, 99.0% of its last 100 requests on Composite succeeded, the typical first token arrives in 2704 ms, output runs at about 93.8 tokens per second.
88%88% positive from 17 votes by Composite users who have run requests through the platform.
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Specifications
Specifications and pricing as served by Composite
Model ID
z-ai/glm-5.3-flash:free
Provider
cv11
Context window
1,048,576 tokens
Accepts
text, image, video
Returns
text
Input price
Included in free allowance
Output price
Included in free allowance
Prompt caching
Supported — cached input is billed at the provider's cache rate, on credits and plans alike
Thinking
Always on for this model
Moderated
No
Cost on a monthly plan
Free - does not spend plan credits
Routing endpoints
1
Use Z.ai: GLM 5.3 Flash (Free) in JanitorAI or SillyTavern
Make a Composite API key and type z-ai/glm-5.3-flash:free as the model name. JanitorAI takes the full URL https://composite.lucidity.sh/v1/chat/completions; SillyTavern, ChubAI, Agnai and RisuAI take https://composite.lucidity.sh/v1.
41.19% of tokens and 40.1% of requests over 30 days.
Success rate
99.0%
Across the last 100 requests Composite served for this model.
Time to first token
2704 ms
Median across the same sample.
Output speed
93.8 tok/s
Median generation rate after the first token.
Prompt cache hits
44.5%
Share of prompt tokens served from the provider's cache over 7 days.
Pricing
Free - 80 requests/day shared across free models; each call counts as 7
Credits pay the provider’s price plus 25%; cache hits cost less.
Monthly plans serve this model without spending any of their included credits.
Provider
cv11
Roleplay fit
GLM models balance strong instruction-following with competitive pricing, a reasonable middle ground for most roleplay setups.
Context behavior
With a 1,048,576-token context window, it can hold a long-running roleplay or a full lorebook in memory without losing earlier plot details, so it suits multi-session campaigns and character cards with heavy backstory.
Cost for regular use
It is free on Composite, which makes it a reasonable place to test a character card, preset or lorebook before connecting your own provider.
From the provider
GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks. Its hybrid sparse and linear attention architecture maintains accurate long-context behavior while...