GLM 5.3 Flash vs Devstral 2 2512: price, context window and capabilities
GLM 5.3 Flash (z-ai/glm-5.3-flash) is a multimodal language model from Z.ai and Devstral 2 2512 (mistralai/devstral-2512) a language model from Mistral; both are on the OceanToken API. GLM 5.3 Flash costs less per token than Devstral 2 2512: $0.15 against $0.40 per 1M input tokens (63% less) and $0.50 against $2.00 per 1M output tokens (75% less). GLM 5.3 Flash has the larger context window: 1.05M tokens (1,048,576) against 262K (262,144) for Devstral 2 2512. Both support tool calling and structured outputs; only GLM 5.3 Flash also lists reasoning, image input and video input; only Devstral 2 2512 also lists file input.
Side by side
| Spec | GLM 5.3 Flash | Devstral 2 2512 |
|---|---|---|
| Model | GLM 5.3 Flashz- | Devstral 2 2512mistralai/ |
| Publisher | Z.ai | Mistral |
| Kind | Text, vision & video | Text |
| Context window | 1.05M tokens1,048,576 | 262K tokens262,144 |
| Input price | $0.15 / 1M tokens | $0.40 / 1M tokens |
| Output price | $0.50 / 1M tokens | $2.00 / 1M tokens |
| Cached input price | $0.03 / 1M tokens | $0.04 / 1M tokens |
| Inputs | text, images and video | text and files |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Not listed |
| Structured outputs | Yes | Yes |
About these prices
Which should you choose?
- Choose GLM 5.3 Flash to spend less per token: 63% less for input and 75% less for output than Devstral 2 2512.
- Choose GLM 5.3 Flash for the longest inputs: its context window holds 1.05M tokens against 262K for Devstral 2 2512.
- Choose GLM 5.3 Flash if you need reasoning, image input and video input: Devstral 2 2512 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 Flash Devstral 2 2512
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or Devstral 2 2512?
GLM 5.3 Flash. GLM 5.3 Flash costs less per token than Devstral 2 2512: $0.15 against $0.40 per 1M input tokens (63% less) and $0.50 against $2.00 per 1M output tokens (75% 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 Devstral 2 2512?
GLM 5.3 Flash. GLM 5.3 Flash has the larger context window: 1.05M tokens (1,048,576) against 262K (262,144) for Devstral 2 2512.
Can I call both GLM 5.3 Flash and Devstral 2 2512 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/devstral-2512.
Models and publishers
GLM 5.3 Flash · Devstral 2 2512 · All Z.ai models · All Mistral models
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