GPT-5.5 Instant system card released — new model capability available

AI Impact Summary

OpenAI has released a system card for GPT-5.5 Instant, indicating a new model capability is available. System cards document model behavior, limitations, and safety properties—essential for teams evaluating whether to adopt this model. This appears to be a capability addition rather than a deprecation, suggesting GPT-5.5 Instant is now ready for production evaluation or deployment.