OpenAI: GPT-5.5 (new)

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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...

$5.00/1M input tokens†
*Artificial Analysis‡Kilo Code Leaderboard†OpenRouterPinchBench
Context Window
1,050,000 tokens
Max Output
128,000 tokens
Input Modalities
fileimagetext

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Real-World Usage

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Pricing

Cost per 1 million tokens

Input Tokens
$5.00
per 1M tokens
Output Tokens
$30.00
per 1M tokens

Example Cost

Analyzing a 10,000 line codebase (≈40k input tokens, 10k output tokens) costs approximately $0.5000

Coding Capabilities

Features and parameters relevant to coding tasks

Coding Features

Function Calling
Can call external functions/APIs
Tool Choice
Control over function selection
Structured Outputs
JSON schema validation
Reasoning Tokens
Extended thinking for complex problems

Pricing details from OpenRouter

Technical Details

Architecture and implementation specifications

Model ID
openai/gpt-5.5
Artificial Analysis Slug
gpt-5-5-high
Created
April 24, 2026
Tokenizer
GPT
Input Modalities
file, image, text
Context Window
1,050,000 tokens
Max Completion Tokens
128,000 tokens
Input Price
$5.00 per 1M tokens
Output Price
$30.00 per 1M tokens
Cache Read Price
$0.50 per 1M tokens
Content Moderation
Enabled

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