GLM 5.3 Flash vs Mistral Small 4: price, context window and capabilities
GLM 5.3 Flash (z-ai/glm-5.3-flash) from Z.ai and Mistral Small 4 (mistralai/mistral-small-2603) from Mistral are both multimodal language models on the OceanToken API. GLM 5.3 Flash costs less per token than Mistral Small 4: $0.50 against $0.60 per 1M output tokens (17% less), and both charge $0.15 per 1M input tokens. GLM 5.3 Flash has the larger context window: 1.05M tokens (1,048,576) against 262K (262,144) for Mistral Small 4. Both support tool calling, reasoning, structured outputs and image input; only GLM 5.3 Flash also lists video input.
Side by side
| Spec | GLM 5.3 Flash | Mistral Small 4 |
|---|---|---|
| Model | GLM 5.3 Flashz- | Mistral Small 4mistralai/ |
| 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 | $0.15 / 1M tokens |
| Output price | $0.50 / 1M tokens | $0.60 / 1M tokens |
| Cached input price | $0.03 / 1M tokens | $0.015 / 1M tokens |
| Inputs | text, images and video | text and images |
| 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: 17% less for output than Mistral Small 4, at the same input price.
- Choose GLM 5.3 Flash for the longest inputs: its context window holds 1.05M tokens against 262K for Mistral Small 4.
- Choose GLM 5.3 Flash if you need video input: Mistral Small 4 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 Small 4
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or Mistral Small 4?
GLM 5.3 Flash. GLM 5.3 Flash costs less per token than Mistral Small 4: $0.50 against $0.60 per 1M output tokens (17% less), and both charge $0.15 per 1M input tokens. 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 Small 4?
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 Small 4.
Can I call both GLM 5.3 Flash and Mistral Small 4 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-small-2603.
Models and publishers
GLM 5.3 Flash · Mistral Small 4 · All Z.ai models · All Mistral models
More comparisons
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