GLM 5.3 Flash vs Qwen3.8 Omni Flash
As of November 12, 2026, GLM 5.3 Flash and Qwen3.8 Omni Flash cost the same per input token ($0.15 per 1M), but GLM 5.3 Flash costs 6% more per output token ($0.50 vs $0.47) and has a 1M-token context window versus 992K.
GLM 5.3 Flash vs Qwen3.8 Omni Flash side by side
| GLM 5.3 Flash | Qwen3.8 Omni Flash | |
|---|---|---|
| Input, per 1M tokens | $0.15 | $0.15 |
| Output, per 1M tokens | $0.50 | $0.47 |
| Cache read, per 1M tokens | $0.03 | $0.016 |
| Cache write, per 1M tokens | $0 | – |
| Context window | 1,048,576 tokens | 991,808 tokens |
| Max output | 128,000 tokens | 131,072 tokens |
| Image input | Yes | Yes |
| Tool calling | Yes | Yes |
| Structured output (JSON) | Yes | Yes |
| Prompt caching | Yes | Yes |
| Reasoning | Yes | Yes |
| Providers on LiteLLM | 24 | 3 |
| Price shown is from | Z.ai | Alibaba Cloud Model Studio |
| Added to LiteLLM | August 27, 2026 | September 18, 2026 |
Cheapest provider for each
- GLM 5.3 Flash: CLF AI Gateway at $0.06 input and $0.20 output per 1M tokens (
clf_ai_gateway/glm-5.3-flash) - Qwen3.8 Omni Flash: Alibaba Cloud Model Studio at $0.15 input and $0.47 output per 1M tokens (
dashscope/qwen3.8-omni-flash)
When to pick which
Pick GLM 5.3 Flash for
- Available from 24 providers through LiteLLM, vs 3.
Pick Qwen3.8 Omni Flash for
- Costs 6% less per output token: $0.47 vs $0.50 per 1M.
From differences in the data above only; where the data is equal, no reason is given.
Call GLM 5.3 Flash or Qwen3.8 Omni Flash with LiteLLM
Both use the OpenAI format through LiteLLM, so switching is a model name change. Set each provider's API key in the environment first.
from litellm import completion
messages = [{"role": "user", "content": "Hello!"}]
# GLM 5.3 Flash
response = completion(model="zai/glm-5.3-flash", messages=messages)
# Qwen3.8 Omni Flash
response = completion(model="dashscope/qwen3.8-omni-flash", messages=messages)
# GLM 5.3 Flash, falling back to Qwen3.8 Omni Flash if the call fails
response = completion(model="zai/glm-5.3-flash", messages=messages, fallbacks=["dashscope/qwen3.8-omni-flash"])FAQ
Which is cheaper, GLM 5.3 Flash or Qwen3.8 Omni Flash?
Qwen3.8 Omni Flash is cheaper at 3 input tokens per output token: $0.23 per 1M tokens blended ($0.15 input, $0.47 output), versus $0.2375 ($0.15 and $0.50) for GLM 5.3 Flash, as of November 12, 2026.
Which has the larger context window, GLM 5.3 Flash or Qwen3.8 Omni Flash?
GLM 5.3 Flash has the larger context window: 1,048,576 tokens, versus 991,808 for Qwen3.8 Omni Flash.
Can I switch from GLM 5.3 Flash to Qwen3.8 Omni Flash without changing my code?
Yes. Through LiteLLM both use the OpenAI format, so switching means changing the model name from "zai/glm-5.3-flash" to "dashscope/qwen3.8-omni-flash", or pointing a LiteLLM gateway model alias at the other model. You can also use one as a fallback for the other.