GLM 5.3 Flash vs Qwen3.8 Flash: price, context window and capabilities
GLM 5.3 Flash (z-ai/glm-5.3-flash) 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 Flash: $0.143 against $0.15 per 1M input tokens (5% less) and $0.447 against $0.50 per 1M output tokens (11% less). GLM 5.3 Flash has the larger context window: 1.05M tokens (1,048,576) against 984K (983,616) for Qwen3.8 Flash. Both support tool calling, reasoning, structured outputs, image input and video input.
Side by side
| Spec | GLM 5.3 Flash | Qwen3.8 Flash −25% |
|---|---|---|
| Model | GLM 5.3 Flashz- | 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 | $0.15 / 1M tokens | $0.143 / 1M tokens |
| Output price | $0.50 / 1M tokens | $0.447 / 1M tokens |
| Cached input price | $0.03 / 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 | Yes | Yes |
About these prices
Which should you choose?
- Choose Qwen3.8 Flash to spend less per token: 5% less for input and 11% less for output than GLM 5.3 Flash.
- Choose GLM 5.3 Flash for the longest inputs: its context window holds 1.05M tokens against 984K for Qwen3.8 Flash.
- Both list the same capabilities: tool calling, reasoning, structured outputs, image input and video input.
- 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 Flash Qwen3.8 Flash
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or Qwen3.8 Flash?
Qwen3.8 Flash. Qwen3.8 Flash costs less per token than GLM 5.3 Flash: $0.143 against $0.15 per 1M input tokens (5% less) and $0.447 against $0.50 per 1M output tokens (11% 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 Flash or Qwen3.8 Flash?
GLM 5.3 Flash. GLM 5.3 Flash 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 Flash 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-flash or qwen/qwen3.8-flash.
Models and publishers
GLM 5.3 Flash · Qwen3.8 Flash · All Z.ai models · All Qwen models
More comparisons
Qwen3.8 Flash vs DeepSeek V4.1 Flash · GLM 5.3 Flash vs Claude Sonnet 5.5 · GLM 5.3 Flash vs Claude Opus 5.5 · GLM 5.3 Flash vs Claude Fable 5.1 · All comparisons