GPT-5.1-Codex-Max

About GPT-5.1-Codex-Max

GPT-5 represents OpenAI's next-generation flagship model, expected to deliver significant advances in AI capability across all domains. Building on GPT-4's foundation, GPT-5 aims to push the boundaries of reasoning, creativity, and multimodal understanding. The model is anticipated to feature improved factual accuracy, reduced hallucinations, and enhanced ability to follow complex instructions. GPT-5 will likely introduce new capabilities and modalities while maintaining OpenAI's focus on safety and alignment. For organizations planning future AI strategies, GPT-5 represents the next major milestone in language model development. It's expected to set new standards for AI capability and influence the direction of the entire industry.

Model Specifications

💰 Real-World Cost Examples

Estimated monthly costs for common use cases

OpenAI Model Lineup

Compare all models from OpenAI to find the best fit

Similar Models from Other Providers

Cross-brand alternatives with similar capabilities

Goliath 120B

Other

Input: $3.75

Output: $7.50

Context: 6k

Gemini 2.5 Pro

Google

Input: $1.25

Output: $10.00

Context: 1.0M

Gemini 2.5 Pro Preview 06-05

Google

Input: $1.25

Output: $10.00

Context: 1.0M

Gemini 2.5 Pro Preview 05-06

Google

Input: $1.25

Output: $10.00

Context: 1.0M

💡 Cheaper Alternatives

Same Brand (OpenAI)

Cross Brand

🚀 Quick Start

Get started with GPT-5.1-Codex-Max API

from openai import OpenAI
client = OpenAI()

response = client.chat.completions.create(
    model="openai/gpt-5.1-codex-max-20251204",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)

Continue Your Decision