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OpenAI kills its dedicated coding model Codex again, folding it into GPT-5.5

THE DECODER / 4/26/2026

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Key Points

  • OpenAI has retired its dedicated Codex coding model again and folded its capabilities into the main GPT-5.5 model.
  • GPT-5.5 is positioned to deliver stronger “agentic” coding performance compared with the prior dedicated setup.
  • OpenAI also claims the new approach reduces token usage, suggesting improved efficiency for coding workloads.
  • The move indicates a continued shift toward consolidating specialized coding capabilities within a unified flagship model.

OpenAI has once again retired its dedicated Codex coding model, folding its capabilities directly into the main model. GPT-5.5 promises stronger agentic coding and lower token usage, OpenAI says.

The article OpenAI kills its dedicated coding model Codex again, folding it into GPT-5.5 appeared first on The Decoder.

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