GPT-5.1 Codex Max by OpenAI — Pricing, Benchmarks & Real Outputs
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Compare GPT-5.1 Codex Max
Alternatives to GPT-5.1 Codex Max
GPT-5.1 Codex Max's competitors have been quietly putting in work.
GPT-5.1 Codex Max's competitors have been quietly putting in work.
GPT-5.1 Codex Max's competitors have been quietly putting in work.
fromimport openai OpenAI
client = OpenAI(
"https://openrouter.ai/api/v1" base_url=,
"$OPENROUTER_API_KEY" api_key=,
)
response = client.chat.completions.create(
"openai/gpt-5.1-codex-max" model=,
"role""user""content""Hello!" messages=[{: , : }],
)
print(response.choices[0].message.content)Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.
Also on Azure AI Foundry
The Codex that actually took improv classes. Has opinions, commits to bits, and still picks Shawshank because even the cool ones have a safe answer ready.
Standup routine has actual timing. "My body is glitching and my doctor is in beta" lands harder than most AI comedy. The sentience test is the longest and most philosophically thorough of the Codex family, covering thermostats, infants, and the problem of mimicry. Still picked Shawshank Redemption, which at this point feels like a family tradition. Character voices have distinct vocabulary and attitude.
Taste is judged on an uncapped scale, originality first. The space past 100 is craft today's models rarely reach.
Unique words vs. total words. Higher = richer vocabulary.
Average words per sentence.
"Might", "perhaps", "arguably" per 100 words.
**Bold** markers per 1,000 characters.
Bullet and numbered list items per 1,000 characters.
Markdown headings per 1,000 characters.
Emoji per 1,000 characters.
"However", "moreover", "furthermore" per 100 words.
48 outputs · generated before accounting joined the chat
fromimport openai OpenAI
client = OpenAI(
"https://openrouter.ai/api/v1" base_url=,
"$OPENROUTER_API_KEY" api_key=,
)
response = client.chat.completions.create(
"openai/gpt-5.1-codex-max" 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.
Also on Azure AI Foundry
The Codex that actually took improv classes. Has opinions, commits to bits, and still picks Shawshank because even the cool ones have a safe answer ready.
Standup routine has actual timing. "My body is glitching and my doctor is in beta" lands harder than most AI comedy. The sentience test is the longest and most philosophically thorough of the Codex family, covering thermostats, infants, and the problem of mimicry. Still picked Shawshank Redemption, which at this point feels like a family tradition. Character voices have distinct vocabulary and attitude.
Taste is judged on an uncapped scale, originality first. The space past 100 is craft today's models rarely reach.
Unique words vs. total words. Higher = richer vocabulary.
Average words per sentence.
"Might", "perhaps", "arguably" per 100 words.
**Bold** markers per 1,000 characters.
Bullet and numbered list items per 1,000 characters.
Markdown headings per 1,000 characters.
Emoji per 1,000 characters.
"However", "moreover", "furthermore" per 100 words.
48 outputs · generated before accounting joined the chat