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OpenAI

GPT-5.5 Instant (May 2026)

ReasoningClosed weights
Intelligence
22.7
Rank 209 of 744 measured models
Price/1M
$11.25
Rank 630 of 659 measured models
Context window
400K
Rank 357 of 1199 measured models

GPT-5.5 Instant (May 2026) scores 22.7 on the Artificial Analysis Intelligence Index, ranking 209th of 744 measured models. The closest models on this index are MiniMax-M2.5 (22.8), Hy3-preview (22.7), and Ling-3.0-flash-Fin (22.6). At $11.25 per million tokens (3:1 input/output blended price), it is more expensive than MiniMax-M2.5 ($0.525), Hy3-preview ($0.10), and Ling-3.0-flash-Fin ($0.111).

Artificial Analysis Indices
Intelligence22.7
Rank 209 of 744 measured models
Standard Benchmarks
GPQA Diamond84.6%
Rank 142 of 619 measured models
HLE21.6%
Rank 209 of 664 measured models
IFBench71.5%
Rank 55 of 450 measured models
AA-LCR66.3%
Rank 249 of 575 measured models
TerminalBench Hard42.4%
Rank 46 of 432 measured models
τ²-Bench49.4%
Rank 209 of 440 measured models
Models at a similar level
The closest models on the Intelligence Index, one configuration per family.

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