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GPT 5.5

GPT 5.5 is the standard tier of the GPT-5.5 model family, advancing the GPT-5 series with stronger intent understanding, deeper autonomous work, and improvements across coding, research, data analysis, and document creation.

ReasoningTool UseWeb SearchImplicit CachingFile InputVision (Image)
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'openai/gpt-5.5',
  prompt: 'Why is the sky blue?'
})
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About GPT 5.5

GPT 5.5 became available on April 24, 2026 on AI Gateway as the standard tier of the GPT-5.5 model family. OpenAI positions it as a model that understands what you're trying to do faster and can carry more of the work itself, extending the agentic gains of the GPT-5.x line.

The model excels at writing and debugging code, researching online, analyzing data, creating documents and spreadsheets, scheduling, learning, and answering everyday personal questions. It supports tool use, web search, implicit caching, file inputs, and vision, giving developers a single model that fits across coding, research, and knowledge-work pipelines.

With a context window of 1M tokens and up to 272K tokens output tokens, GPT 5.5 handles long inputs and produces substantial outputs in a single pass. Pricing is $5 per million input tokens and $30 per million output tokens, with cached input billed at $0.5. Integrate GPT 5.5 through the AI SDK, Chat Completions API, or Responses API depending on your stack.