OpenAI makes GPT-5.3 the new ChatGPT default, rolls out 5.3 Instant
GPT-5.3 Instant targets refusal behavior, web synthesis and hallucinations under everyday workloads — and is default off for Enterprise and Edu unless an admin enables it
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GPT-5.3 Instant targets refusal behavior, web synthesis and hallucinations under everyday workloads — and is default off for Enterprise and Edu unless an admin enables it