Model
GPT-5.5 Instant
Compact GPT model for low-latency assistance and high-volume workloads
1 providersreleased knowledge cutoff 2025-12-01closed weights
$5
best input /M · ZenMux
$30
best output /M
400K
context window
128K
max output
Compare providers (sorted by listed input price)
| Provider | Input /M | Output /M | Cache read /M | Cache write /M | Context | Capabilities | Status | Updated |
|---|---|---|---|---|---|---|---|---|
| ZenMux openai/gpt-5.5-instant | $5 | $30 | $0.5 | — | 400K | reasoningtoolsstructuredvision | May 28, 2026 |
Price badge
https://models.sutraworks.ai/badge/openai/gpt-5.5-instant.svgLive SVG, regenerated on every hourly sync — paste it into a README to always show the current cheapest listed price. Updates when prices change; no build step needed on your side.
Prices are per million tokens (USD). “—” means the provider does not publicly list a price for this model. Data from models.dev; verify with the provider before purchasing.