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  5. Seed 2.1 TurbovsSonoma Sky Alpha
Updated Aug 2026

Seed 2.1 TurbovsSonoma Sky Alpha

Sonoma Sky Alpha is cheaper than Seed 2.1 Turbo at $0/M vs $0.5/M input tokens.

Seed 2.1 Turbo and Sonoma Sky Alpha compared across 34 shared prompts
SpecSeed 2.1 TurboSonoma Sky Alpha
Input price$0.5/M tokensFree
Output price$2.5/M tokensFree
Context window262K tokens2.0M tokens
Free API (OpenRouter)NoNo
ReleasedAug 2026Sep 2025
Our Verdict
Sonoma Sky Alpha
Sonoma Sky Alpha
Seed 2.1 Turbo
Seed 2.1 TurboRunner-up

Not enough votes to call it. On the specs, Sonoma Sky Alpha has the edge: bigger model tier, bigger context window.

Too close to call
API pricing

Cost per 1M tokens

Seed 2.1 Turbo
Input
$0.50
Output
$2.50
Sonoma Sky Alpha
Input
$0.000
Output
$0.000
Where to run it

1 host

Seed 2.1 Turbo1 host
HostInOutContextUptime
ByteDance Seedfp8$0.50 in·$2.50 out·262k·100% up
Sonoma Sky Alpha

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.

Writing DNA

Style Comparison

Similarity
62%

Sonoma Sky Alpha uses 1.9x more emoji

Seed 2.1 Turbo
Sonoma Sky Alpha
50%Vocabulary62%
27wSentence Length16w
0.27Hedging0.41
1.5Bold1.6
2.4Lists2.8
0.07Emoji0.13
1.01Headings1.42
0.04Transitions0.06
Based on 27 + 14 text responses
Research

What we learned reading every model

FAQ

Common questions

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Rival
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