All Models

GPT-5.5 Instant

Reasoning Tool Calling Attachments Structured Output

Compact GPT model for low-latency assistance and high-volume workloads

Providers 1
Released May 5, 2026
Input Modalities text, image, pdf
Output Modalities text
Tarsk Use coding

Available Providers (1)

Provider Model ID Input Cost Output Cost Context Max Output Docs
ZenMux openai/gpt-5.5-instant $5/MTok $30/MTok 400K 128K

Capabilities

Reasoning
Tool Calling
Attachments
Open Weights
Structured Output