3 related posts
This topic page groups 3 posts around GPT-5.5, with coverage across Access and integration, Comparisons and Guides, so you can jump straight to the right article for the task.
Explain which current OpenAI model name belongs to ChatGPT, API, Codex, image generation, realtime voice, REST audio, or Sora video, with dated caveats.
Compare GPT-5.5 and DeepSeek-V4 by current access route, API status, pricing, benchmarks, and first-test fit for developer workflows in 2026.
Learn how to select GPT-5.5 in Codex, why API-key authentication can still fail, how OpenAI API access differs, and when to fall back to GPT-5.4.
