GLM-5.3 vs DeepSeek V4 Pro: API pricing and features
GLM-5.3 vs DeepSeek V4 Pro on BigModel.io: price, context, inputs and Claude Code support. GLM-5.3 $0.20 / $0.64, DeepSeek V4 Pro $0.66 / $1.98 per 1M input / output tokens.
In short
- GLM-5.3 is cheaper: a typical coding-agent request (20K in, 2K out) costs about $0.0053, against $0.017 on DeepSeek V4 Pro, which costs about 3.3 times as much.
- Only GLM-5.3 works in Claude Code; use the other in OpenCode, Cline, Cursor or another OpenAI-compatible tool.
Prices are what BigModel.io charges today, in US dollars. Quality depends on your task: try both on the same prompt before you switch.
Side by side
| GLM-5.3 | DeepSeek V4 Pro | |
|---|---|---|
| Model ID | glm-5.3 | deepseek-v4-pro |
| Developer | GLM | DeepSeek |
| Input / 1M tokens | $0.20 | $0.66 |
| Output / 1M tokens | $0.64 | $1.98 |
| Cached input / 1M | $0.04 | $0.044 |
| Below official price | 85% | 50% |
| Agent request (20K in, 2K out) | $0.0053 | $0.017 |
| Context window | 1M | 1M |
| Inputs | Text | Text |
| Claude Code (/v1/messages) | Yes | No |
| Chat Completions | Yes | Yes |
Switch between them
Both use the same key and base URL. Change only the model field:
client.chat.completions.create(model="glm-5.3", ...) # or "deepseek-v4-pro"To fall back automatically when one is unavailable, send both in models: "models": ["glm-5.3", "deepseek-v4-pro"] Fallback →