Seed 2.1 Turbo vs GLM 5.3 Flash
bytedance/seed-2-1-turbo · z-ai/glm-5.3-flash
As of November 2, 2026, GLM 5.3 Flash is the cheaper API on UberLLM: $0.0023 per million input tokens and $0.0066 per million output, versus $0.3050 / $1.52 for Seed 2.1 Turbo, about 100% 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 Seed 2.1 Turbo when its capabilities fit your task better.
Seed 2.1 Turbo vs GLM 5.3 Flash, side by side
| Spec | Seed 2.1 Turbo | GLM 5.3 Flash |
|---|---|---|
| Price · input / 1M | $0.3050 | $0.0023 |
| Price · output / 1M | $1.52 | $0.0066 |
| Context length | 256,000 | 1,048,576 |
| Max output tokens | 65,536 | 131,072 |
| Input modalities | text, image, video | text, image, video |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 39% off | 95.7% off |
| First token, median (7 days) | — | 5.1 s (3,164 requests) |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 2, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Seed 2.1 Turbo vs GLM 5.3 Flash — FAQ
Is Seed 2.1 Turbo or GLM 5.3 Flash cheaper?
GLM 5.3 Flash is cheaper on a blended token mix, by about 100%. 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 Seed 2.1 Turbo and GLM 5.3 Flash?
Seed 2.1 Turbo: $0.3050 in / $1.52 out per 1M tokens. GLM 5.3 Flash: $0.0023 in / $0.0066 out per 1M tokens. That's roughly a 100% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Seed 2.1 Turbo 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.