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6 posts about GPT-5.5 from Simon Carter.
OpenAI's frontier models and Codex coding agent hit GA on Amazon Bedrock, with IAM access, VPC isolation, CloudTrail logging, and pay-per-token billing.
OpenAI's GPT-Live-1 and GPT-Live-1 mini launch July 8, replacing Advanced Voice Mode with simultaneous listen-and-speak AI powered by GPT-5.5 in the background.
OpenAI is replacing named-model selection in ChatGPT with effort-based tiers — Instant, Medium, High, and more — rolling out to Plus and Pro users now.
OpenAI has improved GPT-5.5 Instant's response quality and quietly retired Canvas in favour of native writing and code blocks in chat.
As of June 12, 2026, GPT-5.2 Instant, Thinking, and Pro are retired from ChatGPT, with all conversations auto-migrated to GPT-5.5 equivalents.
OpenAI replaced GPT-5.3 Instant with GPT-5.5 Instant as ChatGPT's default model on May 5, 2026, bringing fewer hallucinations and tighter responses.