DeepSeek V4 Flash 0731 vs GLM 5.3: price, context window and capabilities
DeepSeek V4 Flash 0731 (deepseek/deepseek-v4-flash-0731) from DeepSeek and GLM 5.3 (z-ai/glm-5.3) from Z.ai are both language models on the OceanToken API. DeepSeek V4 Flash 0731 costs less per token than GLM 5.3: $0.21 against $1.19 per 1M input tokens (82% less) and $0.84 against $3.74 per 1M output tokens (78% less). Both have a 1.05M-token context window (1,048,576 tokens). Both support tool calling, reasoning and structured outputs.
Side by side
| Spec | DeepSeek V4 Flash 0731 −40% | GLM 5.3 −25% |
|---|---|---|
| Model | DeepSeek V4 Flash 0731deepseek/ | GLM 5.3z- |
| Publisher | DeepSeek | Z.ai |
| Kind | Text | Text |
| Context window | 1.05M tokens1,048,576 | 1.05M tokens1,048,576 |
| Input price | $0.21 / 1M tokens | $1.19 / 1M tokens |
| Output price | $0.84 / 1M tokens | $3.74 / 1M tokens |
| Cached input price | $0.006 / 1M tokens | $0.26 / 1M tokens |
| Discount (vs official, top tier) | −40% | −25% |
| Inputs | text | text |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
About these prices
Which should you choose?
- Choose DeepSeek V4 Flash 0731 to spend less per token: 82% less for input and 78% less for output than GLM 5.3.
- Context size does not separate them: both hold about 1.05M tokens.
- Both list the same capabilities: tool calling, reasoning and structured outputs.
- 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 Flash 0731 GLM 5.3
Frequently asked questions
Which is cheaper, DeepSeek V4 Flash 0731 or GLM 5.3?
DeepSeek V4 Flash 0731. DeepSeek V4 Flash 0731 costs less per token than GLM 5.3: $0.21 against $1.19 per 1M input tokens (82% less) and $0.84 against $3.74 per 1M output tokens (78% less). These are OceanToken starting prices per use; the OceanToken console always shows the current price.
Which has the larger context window, DeepSeek V4 Flash 0731 or GLM 5.3?
Neither. Both have a 1.05M-token context window (1,048,576 tokens).
Can I call both DeepSeek V4 Flash 0731 and GLM 5.3 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-flash-0731 or z-ai/glm-5.3.
Models and publishers
DeepSeek V4 Flash 0731 · GLM 5.3 · All DeepSeek models · All Z.ai models
More comparisons
GLM 5.3 vs DeepSeek V4 Pro · GLM 5.3 vs Kimi K3 · DeepSeek V4 Flash 0731 vs Claude Opus 5 · DeepSeek V4 Flash 0731 vs GPT-6 Sol · All comparisons