Codex offers coding-agent access through ChatGPT plans and separately configured API providers. This overview tracks plans, recorded models, interfaces, and verified changes.
Unknown — conflicting GPT-5.4 availability in Codex for ChatGPT-signed-in users
Source A:Codex pricing — The Codex pricing table still displays legacy GPT-5.4 and GPT-5.4 mini rows.
Source B:Using Codex with your ChatGPT plan — The Help Center states those models are no longer available in Codex for users signed in with ChatGPT from August 31, 2026.
Applies to: ChatGPT-signed-in Codex users after 2026-08-31
Decision impact: Do not treat GPT-5.4 as a current Codex ChatGPT-login model. API-provider rows remain a separate access path.
TraceCheck status: Unresolved — Derived outputs must not treat one side as settled Fact.
Last checked Sep 8, 2026, 6:00 PM UTC
Current plans and access
Free
Models
GPT-6 Luna
Access and plan notes
GPT-6 Luna at Standard speed in the desktop app, subject to rollout.
Plus includes limited GPT-6 Astra usage; additional Astra access can use credits.
GPT-5.6 Terra remains selectable during the rollout but has no row in the current usage table. The chatgpt.com table still lists GPT-5.5, GPT-5.4 and GPT-5.4 mini rows; GPT-5.4 and 5.4 mini are retired for ChatGPT sign-in and GPT-5.5 retires October 14, 2026.
Enterprise and Edu pricing is available by contacting sales.
chatgpt.com also mentions a $100 Business plan that includes GPT-6 Astra in existing Codex usage; the usage table publishes only the Standard Business column, so no $100 Business range is stored.
Enterprise and Edu plans without flexible pricing have the same per-seat usage limits as Plus for most features; with flexible pricing there are no fixed rate limits.
ChatGPT Work and Codex share usage under supported ChatGPT plans.
GPT-6.1 Sol is the recommended model for complex coding where available; GPT-6 Luna is recommended for focused, repeatable tasks. GPT-5.6 Sol, Terra and Luna remain available during the rollout.
GPT-5.5 retires from ChatGPT, ChatGPT Work and Codex on all plans on October 14, 2026; the OpenAI API is not affected. GPT-5.3-Codex-Spark retired on September 14, 2026. GPT-5.4 and GPT-5.4 mini retired from ChatGPT-signed-in Codex on August 31, 2026.
Approximate local-message ranges are published per model for Plus and Standard Business. Pro plans currently have no five-hour limit. TraceCheck does not collapse those ranges into one Plus number.
Codex now recommends GPT-6.1 Sol and adds GPT-6 Sol and GPT-6 Luna. GPT-5.3-Codex-Spark retired on September 14, and GPT-5.5 retires from ChatGPT-signed-in Codex on October 14, 2026.
Codex models on Plus: GPT-6 Astra, GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna; Pro also GPT-5.3-Codex-Spark→GPT-6.1 Sol (recommended), GPT-6 Astra, GPT-6 Sol and GPT-6 Luna, with GPT-5.6 Sol, Terra and Luna available during the rollout. Spark retired September 14, 2026; GPT-5.5 retires October 14, 2026
usage limit
Codex Plus limits now list the GPT-6 models: GPT-6.1 Sol 15–160, GPT-6 Sol 15–150 and GPT-6 Luna 350–3,000 local messages per five hours. GPT-5.6 Terra has no row.
Plus approximate local messages per five hours: GPT-6 Astra 5–45, GPT-5.6 Sol 10–100, GPT-5.6 Terra 25–200, GPT-5.6 Luna 250–2,000→Plus and Standard Business approximate local messages per five hours: GPT-6.1 Sol 15–160, GPT-6 Astra 5–45, GPT-6 Sol 15–150, GPT-6 Luna 350–3,000, GPT-5.6 Sol 10–100, GPT-5.6 Luna 250–2,000
usage limit
Codex Pro is now three plans ($100, $200 and $500 per month), and Pro plans currently have no five-hour limit. The Pro 5x and 20x message columns are gone from the usage table.
Pro was one plan from $100/month with official 5x and 20x capacity columns of approximate local messages per five hours (GPT-6 Astra 25–225 at 5x, 100–900 at 20x)→Pro plans at $100, $200 or $500 per month. Pro plans currently have no five-hour limit; weekly limits may apply. Ultrafast mode is on Pro $500
usage limit
Codex Plus approximate five-hour local-message ranges re-verified from the official Plus column; they are not a single collapsed quota.
Unknown — current model-specific message estimates require re-verification. A shared five-hour allowance applies, and additional weekly limits may apply.→Approximate official local-message estimates per five-hour period from the Plus column: GPT-6 Astra 5–45; GPT-5.6 Sol 10–100; GPT-5.6 Terra 25–200; GPT-5.6 Luna 250–2,000. Shared pool; weekly limits may apply; estimates are not fixed limits.