GPT-5.5 Instant
unknownOpenAI
Compact GPT model for low-latency assistance and high-volume workloads
Limits
Context400,000
Input400,000
Output128,000
Modalities
Inputtext, image, pdf
Outputtext
Release info
Release2026-05-05
Last update2026-05-28
Knowledge cutoff2025-12-01
Provider offerings
Provider-specific prices and limits stay separate from canonical model facts.
| Provider | Provider model ID | Input | Output | Context | Output limit |
|---|---|---|---|---|---|
| ZenMux | openai/gpt-5.5-instant | $5 / 1M | $30 / 1M | 400,000 | 128,000 |
Capabilities
Attachments
Yes
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Temperature
Yes