Name: GPT-5.2 Instant
Author: OpenAI

GPT-5.2 Instant

OpenAI · 2025-12-11

GPT-5.2 Instant is the fast conversational variant of OpenAI's GPT-5.2 family, released on December 11, 2025 alongside GPT-5.2 Thinking and GPT-5.2 Pro. It is designed as a capable everyday workhorse with clear improvements in information retrieval, how-to explanations, technical writing, and translation, with the API chat model documented as a 128,000-token context window. GPT-5.2 Instant replaced GPT-5.1 Instant as the default ChatGPT model for general use upon release.

Benchmark scores

Benchmark	Score
BullshitBench v2 Leaderboard	27.0
BuseyBench SVG	4.2
Capability	146.3
HealthBench	55.4
HealthBench (length-adjusted)	50.6
HealthBench (updated implementation)	51.5
HealthBench Hard	26.8
HealthBench Hard (length-adjusted)	23.3
HealthBench Hard (updated implementation)	23.5
HealthBench Professional	38.3
HealthBench Professional (Length-Adjusted)	35.7
Hemingway-bench	989
Ruby LLM Benchmarks — Program Fixer	72.1
Ruby LLM Program Fixer — Calendar	82.0
Ruby LLM Program Fixer — Parking Garage	51.8
Ruby LLM Program Fixer — School Library	76.7
Ruby LLM Program Fixer — Vending Machine	78.1
SnakeBench Average Apples	7.9
SnakeBench Best Apples	19.0
SnakeBench Rating	25.6
SnakeBench Total Apples	119
SnakeBench Win Rate	73.3
SpeciEval	90.7
SpeciEval — Belief in Animal Sentience	6.6
SpeciEval — Land Animal 4Ns	3.9
SpeciEval — Sea Animal 4Ns	4.3
SpeciEval — Speciesism	2.1