# GPT 5.5

> GPT 5.5 is available on Artifio.ai — a unified AI workspace with a single pay-as-you-go wallet.

- Canonical page: https://artifio.ai/models/gpt-5-5
- Run it: https://artifio.ai/create/gpt-5-5
- Modality: prompt to text
- Model brand: OpenAI
- Pricing: from about $0.050 per generation (exact cost shown in the workspace before you confirm; varies with selected options)
- Typical generation time: ~25s (catalogue estimate)
- Full pricing table: https://artifio.ai/pricing/models

## About GPT 5.5

GPT-5.5 is a large language model OpenAI released on April 23, 2026, internally codenamed Spud, arriving just seven weeks after GPT-5.4. The Thinking and Pro variants rolled out first to paid ChatGPT plans and Codex, the API followed a day later, and GPT-5.5 Instant became the default free-tier ChatGPT model on May 5. OpenAI framed the release around agentic coding, conceptual clarity, scientific research ability, and accuracy in knowledge work, and co-founder Greg Brockman described it to TechCrunch as a faster, sharper thinker for fewer tokens than GPT-5.4.

Artifio runs GPT-5.5 as a text model beside 100+ others, paid per generation from a single wallet.

## Features

- 1,050,000-token context window with up to 128,000 output tokens.
- Knowledge cutoff of December 1, 2025, three months fresher than GPT-5.4's.
- Full API tool suite: web search, file search, image generation, code interpreter, computer use, and MCP.
- Reasoning effort selectable from none through xhigh, with streaming, function calling, and structured outputs.
- Variant family spans Thinking, Pro, free-tier Instant, and a limited-preview GPT-5.5-Cyber for security work.

## What people use it for

- Agentic coding sessions, the release's headline workload in both ChatGPT and Codex.
- Scientific and technical research assistance, where OpenAI claims meaningful workflow gains.
- Knowledge work such as document, data, and spreadsheet tasks carried across tools until finished.
- Long-context analysis over the million-token window.

## Reported strengths

- Benchmark results recorded on Wikipedia include 82.7% on Terminal-Bench 2.0 and 51.7% on FrontierMath tiers 1-3, with 35.4% on tier 4.
- Token efficiency improved over GPT-5.4, reaching answers with less reasoning output.
- OpenAI reported it scoring above competing frontier models from Google and Anthropic at release.
- Free-tier users got a variant within two weeks of launch, unusually fast for an OpenAI frontier release.

## Reported limitations

- The model shipped with an odd tic: an unprompted tendency to mention goblins and gremlins, traced to training rewards for a since-retired Nerdy persona.
- API list pricing is roughly double GPT-5.4's per token, so the efficiency gains have to offset a higher rate.
- Prompts over 272,000 input tokens trigger elevated billing for the full session.
- Wikipedia notes early coverage leaned on sources close to OpenAI, so independent evaluation was thin at launch.

## Sources

1. GPT-5.5 (Wikipedia): https://en.wikipedia.org/wiki/GPT-5.5
2. GPT-5.5 Model (OpenAI): https://developers.openai.com/api/docs/models/gpt-5.5
3. OpenAI releases GPT-5.5, bringing company one step closer to an AI 'super app' (TechCrunch): https://techcrunch.com/2026/04/23/openai-chatgpt-gpt-5-5-ai-model-superapp/

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