Type
Spec
Rate
Input
per 1M prompt tokens
$0.075
Output
per 1M generated tokens
$0.25
Web search
per request
$0.033
GLM 5.3 Flash and GLM 5.3 side by side: specs, capabilities, parameters, and live pricing from the EmpirioLabs catalog.
Z.ai Text GenerationGLM 5.3 Flash and GLM 5.3 are both Z.ai models in the Text Generation category, available through the EmpirioLabs API.
| Spec | GLM 5.3 Flash | GLM 5.3 |
|---|---|---|
| Model ID | glm-5-3-flash | glm-5-3 |
| Author | Z.ai | Z.ai |
| Released | Aug 26, 2026 | Aug 14, 2026 |
| Context window | 1M tokens | 1M tokens |
| Max output | 131,072 tokens | 131,072 tokens |
| Input | Text Image Video File | Text |
| Output | Text | Text |
| Structured output | JSON Mode | JSON Mode |
| Region | Singapore | Singapore |
| Endpoints | POST /v1/chat/completions POST /v1/responses POST /v1/messages POST /v1beta/models/glm-5-3-flash:generateContent | POST /v1/chat/completions POST /v1/responses POST /v1/messages POST /v1beta/models/glm-5-3:generateContent |
| Capabilities |
Live rates from the EmpirioLabs catalog for both models. Each rate card always matches what the API charges.
Request parameters each model lists on EmpirioLabs, with the allowed values or range where one applies. A dash marks a parameter the model does not list.
| Parameter | GLM 5.3 Flash | GLM 5.3 |
|---|---|---|
| max_tokens | 1 to 131072 Default: 65536 | 1 to 131072 Default: 65536 |
| temperature | 0 to 1 Default: 1 | 0 to 1 Default: 1 |
| top_p | 0.01 to 1 Default: 0.95 | 0.01 to 1 Default: 0.95 |
| reasoning_effort | low, high, max Default: max | low, high, max Default: max |
| preserve_thinking | boolean Default: false | boolean Default: false |
| do_sample | boolean Default: true | boolean Default: true |
| tool_web_search | boolean Default: false | boolean Default: false |
| search_recency_filter | oneDay, oneWeek, oneMonth, oneYear, noLimit Default: noLimit | oneDay, oneWeek, oneMonth, oneYear, noLimit Default: noLimit |
| count | 1 to 50 Default: 10 | 1 to 50 Default: 10 |
| search_domain_filter | string | string |
| search_prompt | string | string |
| search_result | boolean Default: true | boolean Default: true |
| tool_stream | boolean Default: false | boolean Default: false |
| tools | array Default: [] | array Default: [] |
| tool_choice | object | object |
| stop | array | array |
GLM 5.3 Flash serves the OpenAI-compatible Chat Completions API. Point any OpenAI SDK at https://api.empiriolabs.ai/v1 with your EmpirioLabs API key and use the model id glm-5-3-flash. Both models are called through the same endpoint. Set model to glm-5-3-flash or glm-5-3. Get an API key from the EmpirioLabs dashboard.
curl https://api.empiriolabs.ai/v1/chat/completions \
-H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "glm-5-3-flash",
"messages": [
{"role": "user", "content": "Write a haiku about the ocean."}
]
}'GLM 5.3 Flash is the newer release (Aug 26, 2026); GLM 5.3 was released on Aug 14, 2026. Both models have a context window of 1M tokens. Input types only GLM 5.3 Flash accepts: File, Image, Video. The specs, rate cards, and parameters on this page come from the live EmpirioLabs catalog.
GLM 5.3 Flash is the newer release (Aug 26, 2026); GLM 5.3 was released on Aug 14, 2026.
GLM 5.3 Flash lists the lower rate for Input (per 1M prompt tokens) and Output (per 1M generated tokens). Both live rate cards are on this page and always match what the API charges.
Yes. Both models use POST /v1/chat/completions with the same EmpirioLabs API key, so most integrations switch by changing the model value. Check the parameters table on this page first if you rely on a model-specific parameter.
Yes. Open each model in the EmpirioLabs playground and run the same prompt on both, with the parameters the API exposes.
Check out our pricing or reach out if you want your own model deployed on our stack.