OpenAI: GPT-5.5

2 providers live

openai/gpt-5.5

→

2 live providers
100% uptime
2.07 s first token
1436 tok/s output

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token context window (922K input, 128K output) with support for text and image inputs, enabling large-scale reasoning, coding, and multimodal workflows within a single system.

Context: 1.1M; tokens
Max output: 128K; tokens
Input: $5.00; per million tokens
Output: $30.00; per million tokens

Providers

Ranked by price and speed. Requests go to the best healthy provider, then fail over down the list.Benchmarks

Live providers of GPT-5.5, in the router's order
Who answers now	Input per 1M	First token
llm.buzzpicked	$5.00	8.89 s
OpenAI	$5.00	2.07 s

llm.buzz answers now: first in the router's order.

First token is the 24-hour median. If the pick fails, the next one answers at its own price.

#	Provider	Input	Output	Cache read	Latency	Throughput	Uptime (3d)
1	llm.buzzAutoNon-EU Data policy not declared	$5.00	$30.00	$0.50	8.89 s	1436 tok/s	97.3%
2	OpenAINon-EU Data policy not declared	$5.00	$30.00	$0.50	2.07 s	65 tok/s	100%

Want to serve this model?Become a provider

Price history

No price changes since Oct 22, 2026.

OpenAI$5.00 in, $30.00 out

Performance

Last 24 hours, from llm.buzz's test requests

Throughput (tok/s)

llm.buzz1436 tok/s
OpenAI65 tok/s

Data table

Provider	From (UTC)	p50	p90	p99
llm.buzz	Oct 26, 09:00	65 tok/s	65 tok/s	65 tok/s
llm.buzz	Oct 26, 14:00	193 tok/s	193 tok/s	193 tok/s
llm.buzz	Oct 26, 23:00	1723 tok/s	1723 tok/s	1723 tok/s
llm.buzz	Oct 27, 04:00	1436 tok/s	1436 tok/s	1436 tok/s
llm.buzz	Last 24 hours	1436 tok/s	65 tok/s	65 tok/s
OpenAI	Oct 26, 06:00	65 tok/s	65 tok/s	65 tok/s
OpenAI	Oct 26, 11:00	54 tok/s	54 tok/s	54 tok/s
OpenAI	Oct 26, 15:00	78 tok/s	78 tok/s	78 tok/s
OpenAI	Oct 26, 19:00	65 tok/s	65 tok/s	65 tok/s
OpenAI	Oct 27, 00:00	54 tok/s	54 tok/s	54 tok/s
OpenAI	Oct 27, 04:00	93 tok/s	93 tok/s	93 tok/s
OpenAI	Last 24 hours	65 tok/s	54 tok/s	54 tok/s

Latency (time to first token)

llm.buzz8.89 s
OpenAI2.07 s

Data table

Provider	From (UTC)	p50	p90	p99
llm.buzz	Oct 26, 09:00	22.1 s	22.1 s	22.1 s
llm.buzz	Oct 26, 14:00	4.29 s	4.29 s	4.29 s
llm.buzz	Oct 26, 18:00	8.89 s	8.89 s	8.89 s
llm.buzz	Oct 26, 23:00	5.14 s	5.14 s	5.14 s
llm.buzz	Oct 27, 04:00	18.4 s	18.4 s	18.4 s
llm.buzz	Last 24 hours	8.89 s	22.1 s	22.1 s
OpenAI	Oct 26, 06:00	1.72 s	1.72 s	1.72 s
OpenAI	Oct 26, 11:00	2.07 s	2.07 s	2.07 s
OpenAI	Oct 26, 15:00	2.98 s	2.98 s	2.98 s
OpenAI	Oct 26, 19:00	2.48 s	2.48 s	2.48 s
OpenAI	Oct 27, 00:00	1.72 s	1.72 s	1.72 s
OpenAI	Oct 27, 04:00	2.48 s	2.48 s	2.48 s
OpenAI	Last 24 hours	2.07 s	2.98 s	2.98 s

Uptime

Last 72 hours, by hour

Best provider 100%

This model

llm.buzz

OpenAI

Up: 95% or more served
Degraded: 85% to 95%
Down: below 85%
No data
From llm.buzz's test requests

Questions

How much does OpenAI: GPT-5.5 cost?

OpenAI: GPT-5.5 costs $5.00 per million input tokens and $30.00 per million output tokens at llm.buzz, the provider requests go to first, with cache reads at $0.50 per million tokens.

Do providers train on my prompts?

Each provider declares it, and the table above shows every declaration. You can limit a request to providers that keep nothing, or to providers in the EU.

Can I serve OpenAI: GPT-5.5 myself?

Yes. Apply as a provider, add your endpoint and list this model at your price. It goes live once the automated check passes.

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Call it

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.llm.buzz/api/v1",
    api_key=os.environ["LLM_BUZZ_KEY"],
)
reply = client.chat.completions.create(
    model="openai/gpt-5.5",
    messages=[{"role": "user", "content": "Hello"}],
)

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.llm.buzz/api/v1",
  apiKey: process.env.LLM_BUZZ_KEY,
});
const reply = await client.chat.completions.create({
  model: "openai/gpt-5.5",
  messages: [{ role: "user", content: "Hello" }],
});

curl https://api.llm.buzz/api/v1/chat/completions \
  -H "Authorization: Bearer $LLM_BUZZ_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "openai/gpt-5.5",
       "messages": [{"role": "user", "content": "Hello"}]}'

Endpoints

POST /api/v1/chat/completionsPOST /api/v1/responsesPOST /api/v1/messages

Authentication

Send your llm.buzz key as a Bearer token: Authorization: Bearer $LLM_BUZZ_KEY. Create keys in the console. The same key calls every model; each request pays the price of the provider that answered it.

More in Authentication and the API reference.

Call OpenAI: GPT-5.5 with one keyEach request pays the price of the provider that answered it.

Get API key