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  5. Aurora AlphavsSeed 2.1 Turbo
Updated Aug 2026

Aurora AlphavsSeed 2.1 Turbo

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

Aurora Alpha and Seed 2.1 Turbo compared across 53 shared prompts
SpecAurora AlphaSeed 2.1 Turbo
Input priceFree$0.5/M tokens
Output priceFree$2.5/M tokens
Context window128K tokens262K tokens
Free API (OpenRouter)NoNo
ReleasedFeb 2026Aug 2026
Our Verdict
Seed 2.1 Turbo
Seed 2.1 Turbo
Aurora Alpha
Aurora AlphaRunner-up

Not enough votes to call it. On the specs, Seed 2.1 Turbo has the edge: newer, bigger context window.

Too close to call
API pricing

Cost per 1M tokens

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

1 host

Aurora Alpha

No hosts listed on OpenRouter.

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

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

Writing DNA

Style Comparison

Similarity
62%

Aurora Alpha uses 4.1x more bold

Aurora Alpha
Seed 2.1 Turbo
52%Vocabulary50%
21wSentence Length27w
0.43Hedging0.27
6.3Bold1.5
2.2Lists2.4
0.10Emoji0.07
0.69Headings1.01
0.16Transitions0.04
Based on 22 + 27 text responses
Research

What we learned reading every model

FAQ

Common questions

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