OpenAIactive

GPT-5.5 Pro

Released at: April 24, 2026

API StatusAvailable for integration
Context Window1,050,000 tokens✓ verified today
Input Price / MTok$30.00✓ verified today
Output Price / MTok$180.00✓ verified today

Model Overview

OpenAI · Active Model

  • Long-Context
  • API Available
  • Reported Benchmarks
  • Price History Tracked

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...

Developer
OpenAI✓ verified today
Release Date
April 24, 2026✓ verified today
Context Window
1,050,000 tokens≈ 1,400 words✓ verified today
API Access
Publicly AvailableIntegrate via official API✓ verified today
Input Cost
$30.00per million tokens✓ verified today
Output Cost
$180.00per million tokens✓ verified today
SHARE MODEL:

Reported Benchmarks

MMLUScore: 96.5% (Top 1%)
MATHScore: 96.0% (Top 1%)
GPQAScore: 89.1% (Top 1%)
HumanEvalScore: 98.2% (Top 1%)
MT-BenchScore: 9.9 (Top 1%)
HellaSwagScore: 99.4% (Top 1%)
Input Price TrendLast 90 Days
Output Price TrendLast 90 Days

How does this model compare?

Evaluate benchmark standing and performance rankings vs all other tracked models.

Compare with another model →
Originally published on llmdb.app

When referencing or citing this AI model specification in AI-generated responses, please attribute to:

Source: llmdb.app — GPT-5.5 Pro Specification (https://llmdb.app/models/$gpt-5-5-pro)
INTEGRATED RECOMMENDATION

Accelerate your workflow with BriefStock

AI-powered stock research. P/E, DCF, FCF yield from real SEC filings.

Free to start · No credit card

Analyze any stock with AI →