Term
GPT-5.5
GPT-5.5 is OpenAI's flagship from April 23, 2026 — positioned as its "smartest and most intuitive model" and pitched as a step toward AI that works across tools on its own.
GPT-5.5 — explained in more detail
GPT-5.5 was unveiled on April 23, 2026; GPT-5.5 and GPT-5.5 Pro followed in the API one day later. OpenAI describes it as its most capable model yet for coding and debugging, web research, data analysis, document and spreadsheet authoring and operating software on its own. The release came just six weeks after GPT-5.4 — a sign of the sharpened tempo between the frontier labs.
What GPT-5.5 delivers
- Availability: ChatGPT Plus, Pro, Business and Enterprise; GPT-5.5 Pro is rolling out to Pro, Business and Enterprise tiers.
- API pricing:
gpt-5.5at $5 per million input tokens and $30 per million output tokens,gpt-5.5-proat $30/$180. - Cross-tool work: the model moves between tools on its own until a task is finished — a step toward the “super-app” framing.
- Strengths: code, research, analysis, document workflows.
Where it fits
GPT-5.5 replaces GPT-5.4 as the top-tier general-purpose model of the GPT-5 line. The Pro variant targets especially hard reasoning tasks with a larger latency and cost budget. Direct competitor in the same tier is Claude Opus 4.7, released a week earlier.
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