GPT-5.5 Instant
Compact GPT model for low-latency assistance and high-volume workloads
ECI STANDING#93 of 266
SCORE142.5140.25–145.35 CI
FRONTIER LAGLaunched 13.1 months behindScores about what Gemini 2.5 Pro (Mar 2025) did in March 2025.
SCORES LIKE THESE MODELSQwen3.5-35B-A3BAlibaba · Feb 2026142.53
Full Epoch Capabilities Index ranking ↗Gemini 2.5 Pro (May 2025)Google DeepMind · May 2025142.47
Qwen3-MaxAlibaba · Sep 2025142.43Claude Haiku 4.5Anthropic · Oct 2025142.37From the lab
Launch announcement · May 5, 2026GPT-5.5 Instant: smarter, clearer, and more personalizedRELEASE DATEMay 5, 2026
WEIGHTSClosed weights
CONTEXT WINDOW400K
MAX OUTPUT128K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image, pdf
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.