OpenAI Language Popular

GPT-5.1 Chat Latest

Latest GPT-5.1 chat-optimized model

256K Context window

Text + Vision Modalities

General Specialty

Yes Streaming

Get API key — free View docs →

Model ID gpt-5.1-chat-latest /v1/chat/completions

Our pricing

Input tokens per 1M tok

$1.00

Output tokens per 1M tok

$8.00

Pay-as-you-go · No minimums · Cancel anytime

OpenAI-compatible ( api.belugapi.com/v1)

Start for free →

No credit card required to test

Capabilities

What GPT-5.1 Chat Latest
can do for you.

Native API parity with the official provider — every feature surfaced one-to-one.

Streaming

Server-sent events out of the box

Vision

Analyze images, charts & documents

Long context

200K+ tokens of working memory

Integration

2-line migration.
Zero friction.

BelugAPI is 100 % compatible with the OpenAI SDK. Point base_url to our endpoint and you're done — no refactoring, no learning curve.

Same request & response schema

Python · Node.js · REST · Go · Ruby

Streaming, tool-calling, structured output

Automatic failover & load balancing

Python

from openai import OpenAI

client = OpenAI(
  api_key=bel-your-key,
  base_url=https://api.belugapi.com/v1
)

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

Node.js

import OpenAI from openai;

const client = new OpenAI({
  apiKey:  bel-your-key,
  baseURL: https://api.belugapi.com/v1,
});

const res = await client.chat.completions.create({
  model:    gpt-5.1-chat-latest,
  messages: [{ role: user, content: Hello! }],
});
console.log(res.choices[0].message.content);

cURL

curl https://api.belugapi.com/v1/v1/chat/completions \
  -H Authorization: Bearer bel-your-key \
  -H Content-Type: application/json \
  -d {"model":"gpt-5.1-chat-latest","messages":[{"role":"user","content":"Hello!"}]}

Highlights

Built for production.

Chat

General purpose

Complete guide

Everything about
GPT-5.1 Chat Latest.

Specifications, pricing, capabilities, and integration tips — kept up to date with every OpenAI release.

By OpenAI 2 min read Updated May 2026

Latest GPT-5.1 chat-optimized model

Overview

GPT-5.1 Chat Latest is a cutting-edge large language model (llm) developed by OpenAI, designed to push the boundaries of artificial intelligence-powered content generation.

This model excels in chat, general purpose, making it a top choice for professionals seeking high-quality, scalable AI solutions. Whether you're building production applications, researching new AI capabilities, or creating stunning visual content, GPT-5.1 Chat Latest delivers industry-leading performance and reliability.

Key Specifications

Specification	Details
Model Name	GPT-5.1 Chat Latest
Provider	OpenAI
Category	Large Language Model (LLM)
Model Type	Chat

Pricing

Input: $1/M tokens
Output: $8/M tokens

Key Features & Capabilities

Chat: Advanced capability for professional-grade output.
General Purpose: Advanced capability for professional-grade output.

Use Cases & Applications

Customer support chatbots
Content creation and writing assistants
Knowledge base Q&A systems
Educational tutoring platforms

Frequently asked questions

What is GPT-5.1 Chat Latest best used for?

GPT-5.1 Chat Latest excels at chat, general purpose, making it ideal for professional and enterprise applications.

Who developed GPT-5.1 Chat Latest?

GPT-5.1 Chat Latest was developed by OpenAI, a leading AI research and development company.

How do I integrate GPT-5.1 Chat Latest into my application?

You can integrate GPT-5.1 Chat Latest via its official API endpoint using standard HTTP requests with your API key. SDKs are available for Python, JavaScript, and other languages.

What is the pricing model for GPT-5.1 Chat Latest?

Pricing is based on input. Check the pricing section above for detailed rates.

Ready to ship? Start using GPT-5.1 Chat Latest in under 30 seconds.

Get free API key