GLM 5.3 Flash vs Mistral Medium 3.5: price, context window and capabilities
GLM 5.3 Flash (z-ai/glm-5.3-flash) from Z.ai and Mistral Medium 3.5 (mistralai/mistral-medium-3-5) from Mistral are both multimodal language models on the OceanToken API. GLM 5.3 Flash costs less per token than Mistral Medium 3.5: $0.15 against $1.50 per 1M input tokens (90% less) and $0.50 against $7.50 per 1M output tokens (93% less). GLM 5.3 Flash has the larger context window: 1.05M tokens (1,048,576) against 262K (262,144) for Mistral Medium 3.5. Both support tool calling, reasoning, structured outputs and image input; only GLM 5.3 Flash also lists video input; only Mistral Medium 3.5 also lists file input.
Side by side
| Spec | GLM 5.3 Flash | Mistral Medium 3.5 |
|---|---|---|
| Model | GLM 5.3 Flashz- | Mistral Medium 3.5mistralai/ |
| Publisher | Z.ai | Mistral |
| Kind | Text, vision & video | Text & vision |
| Context window | 1.05M tokens1,048,576 | 262K tokens262,144 |
| Input price | $0.15 / 1M tokens | $1.50 / 1M tokens |
| Output price | $0.50 / 1M tokens | $7.50 / 1M tokens |
| Cached input price | $0.03 / 1M tokens | – |
| Inputs | text, images and video | text, images and files |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
About these prices
Which should you choose?
- Choose GLM 5.3 Flash to spend less per token: 90% less for input and 93% less for output than Mistral Medium 3.5.
- Choose GLM 5.3 Flash for the longest inputs: its context window holds 1.05M tokens against 262K for Mistral Medium 3.5.
- Choose GLM 5.3 Flash if you need video input: Mistral Medium 3.5 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 Flash Mistral Medium 3.5
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or Mistral Medium 3.5?
GLM 5.3 Flash. GLM 5.3 Flash costs less per token than Mistral Medium 3.5: $0.15 against $1.50 per 1M input tokens (90% less) and $0.50 against $7.50 per 1M output tokens (93% 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 Mistral Medium 3.5?
GLM 5.3 Flash. GLM 5.3 Flash has the larger context window: 1.05M tokens (1,048,576) against 262K (262,144) for Mistral Medium 3.5.
Can I call both GLM 5.3 Flash and Mistral Medium 3.5 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 mistralai/mistral-medium-3-5.
Models and publishers
GLM 5.3 Flash · Mistral Medium 3.5 · All Z.ai models · All Mistral models
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