GLM 5.3 vs Qwen3.8 Flash: price, context window and capabilities
GLM 5.3 (z-ai/glm-5.3) is a language model from Z.ai and Qwen3.8 Flash (qwen/qwen3.8-flash) a multimodal language model from Qwen; both are on the OceanToken API. Qwen3.8 Flash costs less per token than GLM 5.3: $0.143 against $1.19 per 1M input tokens (88% less) and $0.447 against $3.74 per 1M output tokens (88% less). GLM 5.3 has the larger context window: 1.05M tokens (1,048,576) against 984K (983,616) for Qwen3.8 Flash. Both support tool calling, reasoning and structured outputs; only Qwen3.8 Flash also lists image input and video input.
Side by side
| Spec | GLM 5.3 −25% | Qwen3.8 Flash −25% |
|---|---|---|
| Model | GLM 5.3z- | Qwen3.8 Flashqwen/ |
| Publisher | Z.ai | Qwen |
| Kind | Text | Text, vision & video |
| Context window | 1.05M tokens1,048,576 | 984K tokens983,616 |
| Input price | $1.19 / 1M tokens | $0.143 / 1M tokens |
| Output price | $3.74 / 1M tokens | $0.447 / 1M tokens |
| Cached input price | $0.26 / 1M tokens | $0.016 / 1M tokens |
| Cache write price | – | $0.20 / 1M tokens |
| Discount (vs official, top tier) | −25% | −25% |
| Inputs | text | 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: 88% less for input and 88% less for output than GLM 5.3.
- Choose GLM 5.3 for the longest inputs: its context window holds 1.05M tokens against 984K for Qwen3.8 Flash.
- Choose Qwen3.8 Flash if you need image input and video input: GLM 5.3 does not list them.
- 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 Qwen3.8 Flash
Frequently asked questions
Which is cheaper, GLM 5.3 or Qwen3.8 Flash?
Qwen3.8 Flash. Qwen3.8 Flash costs less per token than GLM 5.3: $0.143 against $1.19 per 1M input tokens (88% less) and $0.447 against $3.74 per 1M output tokens (88% 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 or Qwen3.8 Flash?
GLM 5.3. GLM 5.3 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 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 or qwen/qwen3.8-flash.
Models and publishers
GLM 5.3 · Qwen3.8 Flash · All Z.ai models · All Qwen models
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