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  5. o1vsTernary Bonsai 2 27B
Updated Sep 2026

o1vsTernary Bonsai 2 27B

Ternary Bonsai 2 27B is cheaper than o1 at $0.075/M vs $15/M input tokens.

o1 and Ternary Bonsai 2 27B compared across 9 shared prompts
Speco1Ternary Bonsai 2 27B
Input price$15/M tokens$0.075/M tokens
Output price$60/M tokens$0.5/M tokens
Context window128K tokens262K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedDec 2024Sep 2026
Our Verdict
o1
o1
Ternary Bonsai 2 27B
Ternary Bonsai 2 27B

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

Ternary Bonsai 2 27B costs 120x less per token.

Too close to call
API pricing

Cost per 1M tokens

o1
Input
$15.00
Output
$60.00
Ternary Bonsai 2 27B
Input
$0.07
200× cheaper
Output
$0.50
120× cheaper

Ternary Bonsai 2 27B is cheaper on both: 200× input, 120× output.

Where to run it

2 hosts

o11 host
HostInOutContextUptime
OpenAI$15.00 in·$60.00 out·200k·100% up
Ternary Bonsai 2 27B1 host
HostInOutContextUptime
DDarkbloomint4$0.07 in·$0.50 out·262k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

o1 is developed by OpenAI while Ternary Bonsai 2 27B is developed by PrismML. o1 has a 128K token context window vs Ternary Bonsai 2 27B's 262K. You can compare their actual outputs across 9 challenges on Rival to see how they differ in practice.

It depends on your use case. o1 and Ternary Bonsai 2 27B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 9 challenges so you can judge which fits your needs best.

o1 costs $15/M input tokens and Ternary Bonsai 2 27B costs $0.075/M input tokens. Ternary Bonsai 2 27B is $14.93/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of o1 and Ternary Bonsai 2 27B across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Model pages

o1 logo
o159 outputs, specs and price
Ternary Bonsai 2 27B logo
Ternary Bonsai 2 27B9 outputs, specs and price
Rival
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