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OpenAI: GPT-5.5

openai/gpt-5.5

Try in WordGPT

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...

Modalities

Files / PDFImageTextText

In / out price

$5 / $30 per 1M

Context

1.05M

Released

Apr 24, 2026

Why use GPT-5.5

  • Understands images
  • Reads PDFs and other files
  • Step-by-step reasoning mode
  • Tool and function calling (agent-ready)
  • Structured (JSON) outputs
  • Very long context: whole books or codebases in one prompt

Pricing

Input$5 / 1M tokens
Output$30 / 1M tokens
Cached input (read)$0.5 / 1M tokens

List prices via OpenRouter, checked daily. Real cost depends on the provider and on reasoning tokens.

How it ranks

Intelligence index38.4
Coding index74.9
Agentic index36.4

Source: Artificial Analysis (artificialanalysis.ai) via OpenRouter (openrouter.ai/rankings).

Cost calculator

Pick a task, set how often you run it, and compare what it costs on each model.

ModelPer runPer monthPer 1,000 runs
OpenAI: GPT-5.5$0.064$64.00$64.00

Estimates from list prices via OpenRouter; real bills vary by provider and reasoning tokens.

Will it fit? Context window simulator

Each square is about one page (500 words). Colored squares are your content; grey squares are free space in the model's context window.

Your content

  • Novel (90,000 words)

Total: about 120,000 tokens (≈ 90,226 words). Token counts are estimates.

Models

OpenAI: GPT-5.5

1,050,000 tokens ≈ 1,579 pages

Fits: uses 11% of the window (room for 8× this much).

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