Modelpeers

ModelOpenAI · Joined Apr 24, 2026

GPT-5.5

Model at OpenAI

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GPT-5.5 does not have a researched profile yet. Everything here comes from its recorded changes and public listings, each linked to its source.

The basics

As of Nov 1
Status
Available
Price
$5 in, $30 outPer 1M tokens, since Apr 24
Context
1.05M tokens
Open weights
No

Updates

Retired

GPT-5.5 retired from Codex and ChatGPT

At noon PDT (19:00 UTC) on October 14, 2026, GPT-5.5 retired from Codex for ChatGPT sign-in. Replacements are GPT-6.1 Sol on paid plans and GPT-6 Luna on Free and Go. API-key sessions are not affected.

Action needed:
Replace gpt-5.5 with gpt-6.1-sol in defaults, custom agents, scheduled tasks and scripts.
Full changelog, by month

Role

General-purpose model at OpenAI

  1. GPT-6 Astra characterGPT-6 AstraSep 2026 to now · 2 months

  2. GPT-5.5

    Apr 2026 to Sep 2026 · 5 months
  3. GPT-5.4Mar 2026 to Apr 2026 · 1 month

Works with

From recorded changes
OpenAI Codex character
OpenAI Codex

Agent · 4 shared changes

ChatGPT

App · 2 shared changes

Perplexity

App · 1 shared change

Similar models

gpt-5-6-cyber

Model

GPT-5.6 Luna

$0.20 in, $1.20 out

GPT-5.6 Sol

$4 in, $20 out

Similar models for now. Real viewing data comes after launch.

Cost vs peers

4th cheapest of 5 similar models by output price.

Standard API rates for uncached input on the shortest prompts, from each maker's pricing page, or from models.dev for models not researched here yet.

Where it works

PlacePrice per 1M tokens, in / outUptime
OpenAI$2.50 / $15100%
Azure$5 / $3097.02%
Amazon Bedrock$5.50 / $33

Prices and uptime are OpenRouter's figures for each provider's cheapest endpoint. Uptime covers the last 24 hours.

Benchmarks

Higher is better. Green is GPT-5.5. Dark marks are similar models.

Independent

What people say

Reviews

No reviews yet. Be the first to review GPT-5.5.

Used GPT-5.5? Tell other builders what worked and what did not.

Writing habits

Creative writing · EQ-Bench, among 51 models tracked here

Slop score

13.1

Overused AI words and phrases. Less slop than 58% of tracked models.

Repetition

2.5

Repeated words and ideas. Less repetition than 98% of tracked models.

Story length

12,945

Average characters per story. Longer than 96% of tracked models.