GPT-5.1

Price

Made by

OpenAI

Input

$1.51 per million tokens

Output

$12.07 per million tokens

Context

400K tokens

Can

Tools, Reasoning, Reads images

Use it from your code

GridPup's API speaks OpenAI's format: use any OpenAI SDK with the base URL https://api.gridpup.com/v1/ai and a GridPup API key with Also use AI models. The answer tells you what it cost. More in the API docs.

from openai import OpenAI

client = OpenAI(base_url="https://api.gridpup.com/v1/ai", api_key="gp_live_…")

r = client.chat.completions.create(
    model="openai/gpt-5.1",
    messages=[{"role": "user", "content": "Explain a KV cache in two sentences."}],
)
print(r.choices[0].message.content)
print("cost:", r.usage.cost_usd, "USD")

Questions

How much does GPT-5.1 cost?

$1.51 per million input tokens and $12.07 per million output tokens, charged per request from your prepaid balance. You need a small balance to start ($1 for most models); there is no monthly fee.

Who runs it?

OpenAI made GPT-5.1. GridPup serves it through Cloudflare's AI Gateway, so you use it with one GridPup balance instead of an account with OpenAI.

Does it work with the OpenAI SDK?

Yes: set base_url to https://api.gridpup.com/v1/ai and the model to openai/gpt-5.1.

Similar chat and reasoning models

• GPT-4.1OpenAI$2.42 per million input tokens
• Claude Sonnet 5Anthropic$2.42 per million input tokens
• Claude Sonnet 5.5Anthropic$2.42 per million input tokens
• GPT-5OpenAI$1.51 per million input tokens
• Gemini 2.5 ProGoogle$1.51 per million input tokens
• Gemini 4 ArgonGoogle$2.42 per million input tokens

All chat and reasoning models and prices