gpt-5.5 · OpenAI
GPT-5.5 raises the baseline for complex production workflows. It’s a strong fit for coding use cases, tool-heavy agents, grounded assistants, long-context retrieval, product-spec-to-plan workflows, and customer-facing workflows where execution quality and response polish are critical.
GPT-5.5 raises the baseline for complex production workflows. It’s a strong fit for coding use cases, tool-heavy agents, grounded assistants, long-context retrieval, product-spec-to-plan workflows, and customer-facing workflows where execution quality and response polish are critical.
GPT 5.5 has a 1,050,000 token context window. It supports up to 128,000 output tokens.
On AIHubMix, GPT 5.5 costs $5 per million input tokens and $30 per million output tokens. Cached input reads are billed at $0.5 per million tokens.
GPT 5.5 accepts text and image input.
GPT 5.5 supports thinking, function calling, structured outputs, web search and tool calling. Per-protocol parameter support is listed in the capability table on this page.
GPT 5.5 is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to gpt-5.5 — no other code changes needed.
GPT 5.5 is developed by OpenAI. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
GPT 5.5 was released on April 24, 2026 by OpenAI.
Free version: GPT 5.5 (free)
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Use GPT 5.5 via the AIHubMix unified API — one interface for every major LLM.