Claude Fable 5.1 vs Seed 2.1 Turbo
anthropic/claude-fable-5.1 · bytedance/seed-2-1-turbo
As of November 2, 2026, Seed 2.1 Turbo is the cheaper API on UberLLM: $0.3050 per million input tokens and $1.52 per million output, versus $0.7250 / $3.63 for Claude Fable 5.1, about 58% 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 Seed 2.1 Turbo to cut cost; choose Claude Fable 5.1 when context size wins. Claude Fable 5.1 carries the larger context window (1,000,000 vs 256,000 tokens), which can matter for long-document work.
Claude Fable 5.1 vs Seed 2.1 Turbo, side by side
| Spec | Claude Fable 5.1 | Seed 2.1 Turbo |
|---|---|---|
| Price · input / 1M | $0.7250 | $0.3050 |
| Price · output / 1M | $3.63 | $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 | 92.8% off | 39% off |
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 Fable 5.1 vs Seed 2.1 Turbo — FAQ
Is Claude Fable 5.1 or Seed 2.1 Turbo cheaper?
Seed 2.1 Turbo is cheaper on a blended token mix, by about 58%. 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 Fable 5.1 and Seed 2.1 Turbo?
Claude Fable 5.1: $0.7250 in / $3.63 out per 1M tokens. Seed 2.1 Turbo: $0.3050 in / $1.52 out per 1M tokens. That's roughly a 58% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Fable 5.1 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.