GLM 5.3 FlashX
z-ai/glm-5.3-flashxGLM-5.3-FlashX is the high-speed tier of Z.ai's GLM-5.3-Flash, documented together with Flash and delivering inference speeds of up to 200 tokens per second. It shares Flash's native multimodal design and hybrid sparse-plus-linear attention, with image, video and file input, always-on reasoning, tool calling and structured output. Pick it over standard Flash for latency-sensitive coding agents, GUI and browser tasks, and interactive chat.
- Input price
- $0.37USD / 1M tokens
- Output price
- $1.25USD / 1M tokens
- Cache read
- $0.09USD / 1M tokens
- Context window
- 1M
- Max output
- 131.1K
Specifications
- Input
- Text, image
- Output
- Text
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OpenAI-compatible endpoint with unified authentication and usage tracking.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/chat/completions" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "z-ai/glm-5.3-flashx",
"messages": [
{
"role": "user",
"content": "Hello"
}
],
"max_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"Questions
FAQ
How do I call Z.ai GLM 5.3 FlashX through SandBase?
Create a SandBase API key, then send requests with the model ID "z-ai/glm-5.3-flashx" to Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.
How much does Z.ai GLM 5.3 FlashX cost?
$0.37 per 1M input tokens and $1.25 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.
What is the context window of Z.ai GLM 5.3 FlashX?
1M tokens of context, with up to 131.1K output tokens per response.
Which features does Z.ai GLM 5.3 FlashX support?
Z.ai GLM 5.3 FlashX supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.
Do I need a separate Z.ai account?
No. One SandBase API key and balance gives you access to Z.ai GLM 5.3 FlashX and the other models in the catalog; you do not need to sign up with Z.ai separately.