Claude Opus 4.6vsHorizon Beta
Horizon Beta is cheaper than Claude Opus 4.6 at $0/M vs $5/M input tokens.
| Spec | Claude Opus 4.6 | Horizon Beta |
|---|---|---|
| Input price | $5/M tokens | Free |
| Output price | $25/M tokens | Free |
| Context window | 1.0M tokens | 256K tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Feb 2026 | Aug 2025 |
Our Verdict
Claude Opus 4.6
Horizon BetaRunner-up
Not enough votes to call it. On the specs, Claude Opus 4.6 has the edge: bigger model tier, newer, bigger context window, major provider backing.
Slight edge
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Claude Opus 4.6
Input
$5.00
Output
$25.00
Horizon Beta
Input
$0.000
Output
$0.000
Where to run it
4 hosts
Horizon Beta
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 12 Sep 2026.
Writing DNA
Style Comparison
Similarity
20%
Claude Opus 4.6 uses 526.7x more bold
Claude Opus 4.6
Horizon Beta
56%Vocabulary62%
33wSentence Length15w
0.73Hedging0.24
5.3Bold0.0
2.7Lists2.2
1.16Emoji0.00
1.23Headings0.00
0.02Transitions0.18
Based on 26 + 16 text responses
Research
What we learned reading every model
FAQ
Common questions
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