OpenAIactive

GPT-5.5

Released at: April 24, 2026

API StatusAvailable for integration
Context Window1,050,000 tokens✓ verified today
Input Price / MTok$5.00✓ verified today
Output Price / MTok$30.00✓ verified today

Model Overview

OpenAI · Active Model

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

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...

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
$5.00per million tokens✓ verified today
Output Cost
$30.00per million tokens✓ verified today
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Reported Benchmarks

MMLUScore: 94.2% (Top 3%)
MATHScore: 93.5% (Top 1%)
HellaSwagScore: 99.0% (Top 1%)
HumanEvalScore: 96.8% (Top 2%)
MT-BenchScore: 9.7 (Top 1%)
GPQAScore: 84.2% (Top 2%)
Input Price TrendLast 90 Days
Output Price TrendLast 90 Days

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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 Specification (https://llmdb.app/models/$gpt-5-5)
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