GPT-5 Codex: pricing, specs, and how to use it (2026)
GPT-5 Codex is an AI model from OpenAI, available alongside ChatGPT, Claude, Gemini, and 300+ other models inside Admix on one subscription from $8.99/mo.
Quick specs
| Provider | OpenAI |
| Model ID | openai/gpt-5-codex |
| Input price | $1.25 / 1M tokens |
| Output price | $10.00 / 1M tokens |
| Tier | pro |
| Accepts images | Yes |
| Category | Advanced |
How to use GPT-5 Codex in Admix
Open Admix, pick GPT-5 Codex from the model list, and start chatting. You can also run the same prompt through GPT-5 Codex and other frontier models like Claude, GPT-5, and Gemini side by side, then pick the best answer or spot disagreement. One subscription, no separate API key.
Compare GPT-5 Codex with other AI models
These are popular comparisons to make alongside GPT-5 Codex:
FAQ
What is GPT-5 Codex?
GPT-5 Codex is an AI model from OpenAI, available inside Admix alongside 300+ other frontier and open-source AI models on one subscription.
How much does GPT-5 Codex cost?
GPT-5 Codex costs $1.25 per million input tokens and $10.00 per million output tokens. In Admix you use it inside one subscription starting at $8.99 per month, no separate API key required.
Can I compare GPT-5 Codex with ChatGPT, Claude, or Gemini?
Yes. Admix lets you run the same prompt through GPT-5 Codex and any of the other 300+ models in the catalog, then see the answers side by side.
Try GPT-5 Codex in Admix
One subscription, 300+ AI models including GPT-5 Codex. Compare any of them side by side from $8.99/mo.
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