GPT-5.5 Instant
GPT-5.5 Instant is developed by OpenAI, released 2026-05-05.
Also written as: GPT 5.5 Instant
Model ID: gpt-5.5-instant
Single public source; verify on the official site
Input price
$5.00 / 1M tok
Output price
$30.00 / 1M tok
Blended price
$11.25 / 1M tok
Epoch Capabilities Index (ECI)
No public data yet
Epoch Mock AIME accuracy
68.1%
Epoch AI · as of 2026-05-05
Epoch FrontierMath (T1–3) accuracy
26.3%
Epoch AI · as of 2026-05-05
Arena text rating
1473.5
84th percentile of 164 models with an Arena text rating score
LMArena · as of 2026-11-06
Arena coding rating (human preference votes, not task accuracy)
1513.6
LMArena · as of 2026-11-06
Arena math rating
1461.5
LMArena · as of 2026-11-06
Arena WebDev rating
No public data yet
Official list price from OpenAI, as recorded by
models.dev.
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reseller snapshot.
See all of OpenAI's models on its provider page, or browse the full model directory. Full source licenses and sync dates: /data-sources/.