# 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.

- Page: https://models.litellm.ai/compare/glm-5.3-flash-vs-qwen3.8-omni-flash
- GLM 5.3 Flash: https://models.litellm.ai/models/glm-5.3-flash
- Qwen3.8 Omni Flash: https://models.litellm.ai/models/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 |

Headline prices in USD per 1M tokens, from LiteLLM's model price file.

## Cheapest provider for each

- GLM 5.3 Flash: CLF AI Gateway at $0.06 input per 1M tokens (`clf_ai_gateway/glm-5.3-flash`)
- Qwen3.8 Omni Flash: Alibaba Cloud Model Studio at $0.15 input per 1M tokens (`dashscope/qwen3.8-omni-flash`)

## When to pick which

- GLM 5.3 Flash: Available from 24 providers through LiteLLM, vs 3.
- Qwen3.8 Omni Flash: Costs 6% less per output token: $0.47 vs $0.50 per 1M.

## 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.