GPT 5.5 Pro

GPT 5.5 Pro is the higher-capability variant in OpenAI's GPT-5.5 generation, positioned as the company's most intuitive and intelligent offering for real-world work. Announced alongside the standard tier and made available in the API a day later, it belongs to the gpt-pro family designed for extended, multi-step tasks rather than single-shot queries. Vercel's AI Gateway exposes it under the identifier openai/gpt-5.5-pro, giving developers access through a unified API surface with usage tracking, retries, failover, and intelligent provider routing.

The model targets demanding professional workflows where autonomous task execution matters: agentic coding and debugging, computer use, online research, data analysis, document and spreadsheet creation, and operating software across tools. OpenAI highlights its ability to plan, use tools, verify its own work, and navigate ambiguity without constant step-by-step prompting, with particular strength in early scientific research where reasoning across long context is essential. This makes GPT 5.5 Pro a strong fit for teams building agentic applications that need to offload complex, messy, multi-part assignments to a single capable model rather than orchestrating narrow tools.

Vercel AI Gatewayopenai/gpt-5.5-progpt-pro

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Quick Info

Provider: Vercel AI Gateway
Model key: openai/gpt-5.5-pro
Release date: Apr 23, 2026
Last updated: Apr 23, 2026
Knowledge cutoff: 2025-12-01
Input modalities
Output modalities
Capabilities

Cost

Input token cost: $30.00
Output token cost: $180.00

Limits

Input tokens: 872,000 tokens
Output tokens: 128,000 tokens
Context window: 1,000,000 tokens

Transparent token rates

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Rates are shown per one million tokens. Combined means one million input plus one million output tokens.

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Latest news about GPT 5.5 Pro

Vercel AI Gateway

Official sourceAnnouncement

OpenAI introduced GPT-5.5 on April 23, 2026, describing it as a step toward more autonomous computer-based work. The model excels at agentic coding, computer use, knowledge work, and early scientific research, planning tools, checking its work, and pushing through ambiguity on long, multi-part tasks. An April 24, 2026 update confirmed GPT-5.5 and GPT-5.5 Pro are now available via the API with updated safety documentation. GPT-5.5 matches GPT-5.4 per-token latency while delivering higher intelligence and uses fewer tokens on Codex tasks, with safeguards informed by nearly 200 early-access partners.

Vercel AI Gateway

Official sourceRelease Notes

Vercel's changelog dated April 24, 2026 announces that both GPT-5.5 and GPT-5.5 Pro are now available on AI Gateway. The standard tier is positioned for long-running agentic work across coding, computer use, knowledge work, and scientific research, with claimed token-efficiency gains over the previous generation and st Developers can invoke the models via the AI SDK using the identifiers `openai/gpt-5.5` and `openai/gpt-5.5-pro`, with AI Gateway providing a unified API surface, usage and cost tracking, retries, failover, custom reporting, observability, Bring Your Own Key support, and intelligent provider routing for higher-than-prov