DeepSeek V4 Flash vs GLM 5.1
deepseek/deepseek-v4-flash · z-ai/glm-5.1
As of October 31, 2026, DeepSeek V4 Flash is the cheaper API on UberLLM: $0.0414 per million input tokens and $0.0828 per million output, versus $0.0693 / $0.2178 for GLM 5.1, about 60% less when output is 3 tokens for every input token. These are the median prices buyers paid over the last 24 hours. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose DeepSeek V4 Flash to cut cost; choose GLM 5.1 when its capabilities fit your task better.
DeepSeek V4 Flash vs GLM 5.1, side by side
| Spec | DeepSeek V4 Flash | GLM 5.1 |
|---|---|---|
| Price · input / 1M | $0.0414 | $0.0693 |
| Price · output / 1M | $0.0828 | $0.2178 |
| Context length | 1,000,000 | 200,000 |
| Max output tokens | 128,000 | 24,000 |
| Input modalities | text | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 55% off | 95% off |
Median prices buyers paid on UberLLM over the last 24 hours. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated October 31, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
DeepSeek V4 Flash vs GLM 5.1 — FAQ
Is DeepSeek V4 Flash or GLM 5.1 cheaper?
DeepSeek V4 Flash is cheaper on a blended token mix, by about 60%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between DeepSeek V4 Flash and GLM 5.1?
DeepSeek V4 Flash: $0.0414 in / $0.0828 out per 1M tokens. GLM 5.1: $0.0693 in / $0.2178 out per 1M tokens. That's roughly a 60% blended difference. Prices are live; UberLLM adds no fee.
Can I use both DeepSeek V4 Flash and GLM 5.1 with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.