GPT-5.5 Instant
by OpenAI · ID gpt-5-5-instant · Released 2026-05 · Proprietary
1474
ELO Score
-
MMLU
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HumanEval
128K
Context Window
$2.50
Input Price
About GPT-5.5 Instant
Fast default model powering ChatGPT for all users. Optimized for speed while maintaining GPT-5.5 quality. Arena text score 1474 (gpt-5.5-instant, 25,850 votes), leaderboard of 13 September 2026.
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