Claude Sonnet 5.5 vs Seed 2.1 Turbo
anthropic/claude-sonnet-5.5 · bytedance/seed-2-1-turbo
As of November 2, 2026, Claude Sonnet 5.5 is the cheaper API on UberLLM: $0.1048 per million input tokens and $0.5238 per million output, versus $0.3050 / $1.52 for Seed 2.1 Turbo, about 66% 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 Claude Sonnet 5.5 to cut cost; choose Seed 2.1 Turbo when its capabilities fit your task better.
Claude Sonnet 5.5 vs Seed 2.1 Turbo, side by side
| Spec | Claude Sonnet 5.5 | Seed 2.1 Turbo |
|---|---|---|
| Price · input / 1M | $0.1048 | $0.3050 |
| Price · output / 1M | $0.5238 | $1.52 |
| Context length | 1,000,000 | 256,000 |
| Max output tokens | 128,000 | 65,536 |
| Input modalities | text, image, file | text, image, video |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 94.8% off | 39% off |
| First token, median (7 days) | 2.8 s (179 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?
Claude Sonnet 5.5 vs Seed 2.1 Turbo — FAQ
Is Claude Sonnet 5.5 or Seed 2.1 Turbo cheaper?
Claude Sonnet 5.5 is cheaper on a blended token mix, by about 66%. 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 Claude Sonnet 5.5 and Seed 2.1 Turbo?
Claude Sonnet 5.5: $0.1048 in / $0.5238 out per 1M tokens. Seed 2.1 Turbo: $0.3050 in / $1.52 out per 1M tokens. That's roughly a 66% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 5.5 and Seed 2.1 Turbo 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.