GPT-5.1

Name: GPT-5.1
Brand: OpenAI
SKU: gpt-5.1-2025-11-13

GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic workflows spanning software engineering, mathematics, and research. GPT-5.1-Codex-Max...

gpt-5.1-2025-11-13

Open Relay View integration

relay/request.mjsready to route

const completion = await client.chat.completions.create({
  model: "gpt-5.1-2025-11-13",
  messages: [
    { role: "user",
      content: "Plan a multi-step task" }
  ]
});

CONTEXT400K contextprompt window

MAX OUTPUT128Kper response

INPUT$1.25 / Mtoken price

OUTPUT$10.00 / Mtoken price

Route configuration_

Choose a supported call format.

Select a format below to view its documentation. Use the displayed converter route when calling through PipeLLM.

ENDPOINThttps://api.pipellm.aiOne base URL for OpenAI Chat Completions, Responses, Anthropic, and Gemini.

SUPPORTED CALL FORMATS

OpenAI/openai/v1/chat/completionsDocs Responses/responses/v1/responsesDocs Anthropic/anthropic/v1/messagesDocs Gemini/gemini/v1beta/models/{model}:generateContentDocs Choose a call format to open its request and response documentation.

MODEL IDgpt-5.1-2025-11-13Use this in every request

GOVERNANCEPolicy controlledApprovals and tool rules apply

PROVIDER AVAILABILITY2 routes

Provider	Context	Max output	Discount	Input / M	Output / M
OpenAI	400K context	128K	—	$1.25 / M	$10.00 / M
Azure	400K context	128K	—	$1.25 / M	$10.00 / M

Displayed pricing is per one million tokens and may vary by provider.

SUPPORTED SURFACESactive

input: textinput: imageoutput: texttool usecache control

Relay governs model access with the same routing policy that Lens keeps visible and auditable.