DeepSeek V4.1 Flash (1017) vs GLM 5.3 Prime: price, context window and capabilities
DeepSeek V4.1 Flash (1017, deepseek/deepseek-v4.1-flash-1017) is a multimodal language model from DeepSeek and GLM 5.3 Prime (z-ai/glm-5.3-prime) a language model from Z.ai; both are on the OceanToken API. DeepSeek V4.1 Flash costs less per token than GLM 5.3 Prime: $0.21 against $2.80 per 1M input tokens (93% less) and $0.84 against $8.80 per 1M output tokens (90% less). DeepSeek V4.1 Flash has the larger context window: 1.05M tokens (1,048,576) against 1M (1,000,000) for GLM 5.3 Prime. Both support tool calling and reasoning; only DeepSeek V4.1 Flash also lists structured outputs and image input.
Side by side
| Spec | DeepSeek V4.1 Flash −40% | GLM 5.3 Prime |
|---|---|---|
| Model | DeepSeek V4.1 Flash (1017)deepseek/ | GLM 5.3 Primez- |
| Publisher | DeepSeek | Z.ai |
| Kind | Text & vision | Text |
| Context window | 1.05M tokens1,048,576 | 1M tokens1,000,000 |
| Input price | $0.21 / 1M tokens | $2.80 / 1M tokens |
| Output price | $0.84 / 1M tokens | $8.80 / 1M tokens |
| Cached input price | $0.006 / 1M tokens | $0.56 / 1M tokens |
| Discount (vs official, top tier) | −40% | — |
| Inputs | text and images | text |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Not listed |
About these prices
Which should you choose?
- Choose DeepSeek V4.1 Flash to spend less per token: 93% less for input and 90% less for output than GLM 5.3 Prime.
- Choose DeepSeek V4.1 Flash for the longest inputs: its context window holds 1.05M tokens against 1M for GLM 5.3 Prime.
- Choose DeepSeek V4.1 Flash if you need structured outputs and image input: GLM 5.3 Prime 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 DeepSeek V4.1 Flash GLM 5.3 Prime
Frequently asked questions
Which is cheaper, DeepSeek V4.1 Flash or GLM 5.3 Prime?
DeepSeek V4.1 Flash. DeepSeek V4.1 Flash costs less per token than GLM 5.3 Prime: $0.21 against $2.80 per 1M input tokens (93% less) and $0.84 against $8.80 per 1M output tokens (90% less). These are OceanToken starting prices per use; the OceanToken console always shows the current price.
Which has the larger context window, DeepSeek V4.1 Flash or GLM 5.3 Prime?
DeepSeek V4.1 Flash. DeepSeek V4.1 Flash has the larger context window: 1.05M tokens (1,048,576) against 1M (1,000,000) for GLM 5.3 Prime.
Can I call both DeepSeek V4.1 Flash and GLM 5.3 Prime 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 deepseek/deepseek-v4.1-flash-1017 or z-ai/glm-5.3-prime.
Models and publishers
DeepSeek V4.1 Flash · GLM 5.3 Prime · All DeepSeek models · All Z.ai models
More comparisons
DeepSeek V4.1 Flash vs Claude Opus 5.5 · DeepSeek V4.1 Flash vs Claude Fable 5.1 · DeepSeek V4.1 Flash vs Claude Opus 5 · DeepSeek V4.1 Flash vs GPT-6 Sol · All comparisons