Grok 4.20 Beta vs GLM 5.3
x-ai/grok-4.20-beta · z-ai/glm-5.3
As of November 3, 2026, GLM 5.3 is the cheaper API on UberLLM: $0.0005 per million input tokens and $0.0234 per million output, versus $0.1750 / $0.3500 for Grok 4.20 Beta, about 94% less when output is 3 tokens for every input token. These are the best prices on the market right now. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose GLM 5.3 to cut cost; choose Grok 4.20 Beta when context size wins. Grok 4.20 Beta carries the larger context window (2,000,000 vs 1,000,000 tokens), which can matter for long-document work.
Grok 4.20 Beta vs GLM 5.3, side by side
| Spec | Grok 4.20 Beta | GLM 5.3 |
|---|---|---|
| Price · input / 1M | $0.1750 | $0.0005 |
| Price · output / 1M | $0.3500 | $0.0234 |
| Context length | 2,000,000 | 1,000,000 |
| Max output tokens | 128,000 | 131,072 |
| Input modalities | text, image | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | — |
| Reasoning | Yes | Yes |
| % off list | 86% off | 99.4% off |
| First token, median (7 days) | — | 3.8 s (521 requests) |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 3, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Grok 4.20 Beta vs GLM 5.3 — FAQ
Is Grok 4.20 Beta or GLM 5.3 cheaper?
GLM 5.3 is cheaper on a blended token mix, by about 94%. 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 Grok 4.20 Beta and GLM 5.3?
Grok 4.20 Beta: $0.1750 in / $0.3500 out per 1M tokens. GLM 5.3: $0.0005 in / $0.0234 out per 1M tokens. That's roughly a 94% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Grok 4.20 Beta and GLM 5.3 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.