Updated · April 2026

Codex plans.

Featured

OpenAI's flagship with GPT-5.5 and Codex agent (released April 23, 2026). The Codex app is getting improved and the model has much more generous limits than Claude. Appreciated for backend tasks. Expanded browser and computer use. Codex CLI is open-source.

SWE-Bench 80.0%

40 TPS output

Dense architecture

Included plans

More messages than free - ad-supported (US)

Plus

GPT-5.5 - 10 Deep Research runs - Sora

Pro

5x Plus usage - Fast mode - GPT-5.3-Codex-Spark preview

Pro Ultra

20x usage - 250 Deep Research - 1M token context - 400K context

Best deal

Much more generous limits than Claude. Codex app keeps improving - great for backend tasks.

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Sources: official sites · r/ClaudeAI · r/LocalLLaMA · r/ZaiGLM · r/ChatGPT. Plans and features may vary - check official sites for the latest.