GPT 5.4 Nano vs GLM 5.3 Flash
openai/gpt-5.4-nano · z-ai/glm-5.3-flash
As of November 1, 2026, GLM 5.3 Flash is the cheaper API on UberLLM: $0.0015 per million input tokens and $0.0049 per million output, versus $0.0390 / $0.2437 for GPT 5.4 Nano, about 98% 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 Flash to cut cost; choose GPT 5.4 Nano when its capabilities fit your task better.
GPT 5.4 Nano vs GLM 5.3 Flash, side by side
| Spec | GPT 5.4 Nano | GLM 5.3 Flash |
|---|---|---|
| Price · input / 1M | $0.0390 | $0.0015 |
| Price · output / 1M | $0.2437 | $0.0049 |
| Context length | 400,000 | 1,048,576 |
| Max output tokens | 128,000 | 131,072 |
| Input modalities | text, image | text, image, video |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 80.5% off | 95.7% off |
| First token, median (7 days) | — | 6.3 s (1,528 requests) |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 1, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
GPT 5.4 Nano vs GLM 5.3 Flash — FAQ
Is GPT 5.4 Nano or GLM 5.3 Flash cheaper?
GLM 5.3 Flash is cheaper on a blended token mix, by about 98%. 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 GPT 5.4 Nano and GLM 5.3 Flash?
GPT 5.4 Nano: $0.0390 in / $0.2437 out per 1M tokens. GLM 5.3 Flash: $0.0015 in / $0.0049 out per 1M tokens. That's roughly a 98% blended difference. Prices are live; UberLLM adds no fee.
Can I use both GPT 5.4 Nano and GLM 5.3 Flash 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.