OpenAI Launches GPT-5.5 with Faster Speed and Lower Token Usage

April 23, 2026

Details

  • OpenAI released GPT-5.5, announced by CEO Sam Altman, who called it smart, fast, and effective at understanding tasks.
  • Matches per-token speed of GPT-5.4 but uses significantly fewer tokens per task, improving efficiency.
  • Immediately available in ChatGPT and Codex platforms.
  • API rollout imminent after security and safeguard reviews with customers; features 1 million token context window.
  • API pricing set at $5 per 1M input tokens and $30 per 1M output tokens, lower effective cost due to reduced token needs versus GPT-5.4.
  • Posted April 23, 2026, emphasizing personal endorsement from Altman.

Impact

GPT-5.5 pressures rivals like Anthropic's Claude and Google's Gemini by matching GPT-5.4 speeds while slashing token consumption, enabling cheaper, more efficient API usage at $5/$30 per million input/output tokens—higher than GPT-5.4's $2.50/$15 but offset by fewer tokens needed per task. This could accelerate enterprise adoption, widen access for cost-sensitive developers, and solidify OpenAI's lead in frontier models amid intensifying competition.

Read more