Optimus Alpha

Name: Optimus Alpha
Brand: openrouter
Availability: OnlineOnly

Revealed as GPT-4.1

A stealth general-purpose model for long-context work, including code generation. Shipped on community feedback.

Website Docs Blog

Provider: OpenRouter
Released: 2025-04-10
Parameters: Unknown

Benchmarks

Aider Polyglot

53.0%

source ↗

Get API accessProvider and language code samples

Provider

fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"openrouter/optimus-alpha"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Deep analysisPsychometrics, taste index, writing DNA

SubjectiveBench

Taste Index

Across 19 scored outputs

How this is measured →

230.23xFloor

0100headroom →

Taste is judged on an uncapped scale, originality first. The space past 100 is craft today's models rarely reach.

Craft34

Originality16

Plays it safe

share of outputs that are the default answer

68%

Writing DNA

Stylometric Fingerprint

Based on 10 text responses

Tick = global average

Vocabulary Diversity63%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length18.2 words

Average words per sentence.

Hedging0.55

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting7.7

**Bold** markers per 1,000 characters.

List Usage5.7

Bullet and numbered list items per 1,000 characters.

Section Structure0.30

Markdown headings per 1,000 characters.

Emoji Usage0.00

Emoji per 1,000 characters.

Transitions0.27

"However", "moreover", "furthermore" per 100 words.

Opening Habits

Consistency

71%

Across 10 responses

Model Responses

19 outputs · generated before accounting joined the chat

Reviewing agent-written code?See a Brief PR report

Keep exploring

COMPARE

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RANKINGS

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Taste Index

Stylometric Fingerprint

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Compare Optimus Alpha

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Taste Index

Stylometric Fingerprint

Model Responses

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Best AI for Frontend Development