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  5. OpenAI o3vsSonoma Sky Alpha
Updated Sep 2025

OpenAI o3vsSonoma Sky Alpha

Sonoma Sky Alpha is cheaper than OpenAI o3 at $0/M vs $10/M input tokens.

OpenAI o3 and Sonoma Sky Alpha compared across 35 shared prompts
SpecOpenAI o3Sonoma Sky Alpha
Input price$10/M tokensFree
Output price$40/M tokensFree
Context window—2.0M tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedApr 2025Sep 2025
Our Verdict
OpenAI o3
OpenAI o3
Sonoma Sky Alpha
Sonoma Sky Alpha

Not enough votes to call it. On the specs, nothing separates them.

Too close to call
API pricing

Cost per 1M tokens

OpenAI o3
Input
$10.00
Output
$40.00
Sonoma Sky Alpha
Input
$0.000
Output
$0.000
Where to run it

1 host

OpenAI o31 host
HostInOutContextUptime
OpenAI$2.00 in·$8.00 out·200k·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
59%

Sonoma Sky Alpha uses 12.8x more emoji

OpenAI o3
Sonoma Sky Alpha
70%Vocabulary62%
14wSentence Length16w
0.27Hedging0.41
0.6Bold1.6
2.8Lists2.8
0.00Emoji0.13
0.32Headings1.42
0.10Transitions0.06
Based on 19 + 14 text responses
Research

What we learned reading every model

FAQ

Common questions

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