GLM 5.3 FlashX vs Qwen3.8 Flash: price, context window and capabilities
GLM 5.3 FlashX (z-ai/glm-5.3-flashx) from Z.ai and Qwen3.8 Flash (qwen/qwen3.8-flash) from Qwen are both multimodal language models on the OceanToken API. Qwen3.8 Flash costs less per token than GLM 5.3 FlashX: $0.143 against $0.37 per 1M input tokens (61% less) and $0.447 against $1.25 per 1M output tokens (64% less). GLM 5.3 FlashX has the larger context window: 1.05M tokens (1,048,576) against 984K (983,616) for Qwen3.8 Flash. Both support tool calling, reasoning, image input and video input; only Qwen3.8 Flash also lists structured outputs.
Side by side
| Spec | GLM 5.3 FlashX | Qwen3.8 Flash −25% |
|---|---|---|
| Model | GLM 5.3 FlashXz- | Qwen3.8 Flashqwen/ |
| Publisher | Z.ai | Qwen |
| Kind | Text, vision & video | Text, vision & video |
| Context window | 1.05M tokens1,048,576 | 984K tokens983,616 |
| Input price | $0.37 / 1M tokens | $0.143 / 1M tokens |
| Output price | $1.25 / 1M tokens | $0.447 / 1M tokens |
| Cached input price | $0.09 / 1M tokens | $0.016 / 1M tokens |
| Cache write price | – | $0.20 / 1M tokens |
| Discount (vs official, top tier) | — | −25% |
| Inputs | text, images and video | text, images and video |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Not listed | Yes |
About these prices
Which should you choose?
- Choose Qwen3.8 Flash to spend less per token: 61% less for input and 64% less for output than GLM 5.3 FlashX.
- Choose GLM 5.3 FlashX for the longest inputs: its context window holds 1.05M tokens against 984K for Qwen3.8 Flash.
- Choose Qwen3.8 Flash if you need structured outputs: GLM 5.3 FlashX does not list it.
- Not sure? Call both with the same OceanToken API key and compare them on your own prompts; each request is billed per use from one prepaid balance.
Get API Key GLM 5.3 FlashX Qwen3.8 Flash
Frequently asked questions
Which is cheaper, GLM 5.3 FlashX or Qwen3.8 Flash?
Qwen3.8 Flash. Qwen3.8 Flash costs less per token than GLM 5.3 FlashX: $0.143 against $0.37 per 1M input tokens (61% less) and $0.447 against $1.25 per 1M output tokens (64% less). These are OceanToken starting prices per use; the OceanToken console always shows the current price.
Which has the larger context window, GLM 5.3 FlashX or Qwen3.8 Flash?
GLM 5.3 FlashX. GLM 5.3 FlashX has the larger context window: 1.05M tokens (1,048,576) against 984K (983,616) for Qwen3.8 Flash.
Can I call both GLM 5.3 FlashX and Qwen3.8 Flash with one API key?
Yes. Both are on the OceanToken API at https://api.oceantoken.ai/v1: one API key and one prepaid balance call either model. Send the model id z-ai/glm-5.3-flashx or qwen/qwen3.8-flash.
Models and publishers
GLM 5.3 FlashX · Qwen3.8 Flash · All Z.ai models · All Qwen models
More comparisons
Qwen3.8 Flash vs DeepSeek V4.1 Flash · GLM 5.3 FlashX vs Claude Sonnet 5.5 · GLM 5.3 FlashX vs Claude Opus 5.5 · GLM 5.3 FlashX vs Claude Fable 5.1 · All comparisons