#gpt-5-5

Why it matters: this is one of the first external benchmark reads to land right after the GPT-5.5 launch. Artificial Analysis said GPT-5.5 moved 3 points clear on its Intelligence Index, while the full index run still became roughly 20% more expensive.

Why it matters: OpenAI is tying GPT-5.5 directly to agent workflows instead of treating it as a chat-only refresh. A developer follow-up arrived 2 minutes later and said the model is live in ChatGPT and Codex now, with API access next.