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OpenAI Codex is the coding agent that runs across ChatGPT, an IDE extension, the CLI and cloud environments on a single ChatGPT account, with cloud worktrees, scheduled background tasks, Skills and code review. The Codex pricing documentation lists Free at $0/month for "quick coding tasks", Go at $8/month, Plus at $20/month, Pro from $100/month, Business at $20/user/month billed annually ($25 monthly, minimum 2 users) and Enterprise/Edu by contact, plus an API-key route billed at API rates. Usage is measured as messages per five-hour period that vary by model: on Plus, the documented ranges run from 250-2,000 messages for GPT-5.6 Luna down to 5-45 for GPT-6 Astra, and OpenAI states these are estimates rather than fixed limits.

unknownbest-effort probe · checked never
Paid API Cloud agent, API keyFreemiumLow risk· conf 90%verified
// access — getting accessCloud agent

OpenAI API key with Codex Cloud task access.

Free credits
$0
Codex Free is $0/month, described as "Explore Codex capabilities on quick coding tasks"; no fixed free message count is published (Codex pricing docs, checked 2026-09-16).
Cheapest input /1M
$0.0000
USD per 1M input tokens, best tracked model
Cheapest output /1M
$0.0000
USD per 1M output tokens, best tracked model
Models tracked
95
Canonical models with normalized pricing
// source_analysisUprouter editorial analysis

// pros

  • Free at $0/month lets you run Codex on quick coding tasks with no payment, and Go at $8/month is the cheapest paid step up.
  • Plus at $20/month includes Codex on web, CLI, IDE extension and iOS, cloud-based code review and Slack integration, and the GPT-5.6 model family.
  • Published per-five-hour usage ranges make planning concrete: for example GPT-5.6 Luna is listed at 250-2,000 local messages on Plus and 5,000-40,000 on Pro 20x.
  • API-key usage gives CLI, SDK and IDE access billed at API pricing, which suits CI and shared environments without a ChatGPT seat.
  • Business adds no training on business data by default, SAML SSO and MFA, and lets teams extend usage with ChatGPT credits.

// cons

  • Free access is described only as "explore Codex capabilities on quick coding tasks", and no free message count is published - the usage table covers Plus, Pro, Business and API-key only.
  • Message allowances are ranges affected by model, task complexity, context, tool use, retrieval and caching, and OpenAI states they are not fixed message limits.
  • Cloud features including Codex cloud, GitHub code review, Slack and Linear integration require a ChatGPT plan; API-key access excludes all of them.
  • Image generation is not available on the Free plan, Codex usage is shared with agentic features such as ChatGPT Work, and model churn is documented on the same page - GPT-5.5 retires from ChatGPT, ChatGPT Work and Codex on all plans on October 14, 2026.

Treat the Free tier as an evaluation rather than a working setup, choose Plus at $20/month if your coding is a few focused sessions a week, and move to Pro from $100/month when agents run continuously. Teams already paying for GitHub Copilot should compare Copilot cloud agent against Codex cloud before funding both.

written by Mike Fleming, Uprouter editorial · verified against official sources September 16, 2026

// free_quota
$0provider-quoted

Value taken from the provider’s own published free-tier terms, expressed in USD.

note: Codex Free is $0/month, described as "Explore Codex capabilities on quick coding tasks"; no fixed free message count is published (Codex pricing docs, checked 2026-09-16).

// pricinglast verified Sep 16, 2026
PlanTypeMonthlyInput /1MOutput /1MNote
Pay-as-you-gopayg—$0.0000$0.0000Cheapest tracked model rate (OpenRouter-normalized).
Freefree———Basic access to explore Codex capabilities for quick coding tasks.
Gosubscription$8.00/mo——Lightweight plan for coding tasks with increased limits.
ChatGPT Free / Go (Codex included)subscription$0/mo——Codex is included across ChatGPT plans, including Free and Go; usage limits vary by plan (help.openai.com, 2026).
ChatGPT Plussubscription$20.00/mo——Codex usage included within the Plus allowance; expanded Codex usage and cloud environments (chatgpt.com/codex/pricing).
ChatGPT Pro ($100 tier)subscription$100.00/mo——Higher Codex usage allowance; newer codex models (e.g., GPT-6 Astra) included within the existing Codex usage allowance on the $100 Pro plan.
ChatGPT Pro ($200 tier)subscription$200.00/mo——Top individual Codex usage allowance; $200 Pro tier for heavy agent use (chatgpt.com/codex/pricing; community announcement of the $100/$200 Pro tiers).
OpenAI API (pay-as-you-go)payg———Codex models are also available on the OpenAI platform with token-based pricing; exact per-model rates not captured in this batch (see catalog entries for gpt-5.x pricing).
pricing_last_verified: Sep 16, 2026official pricing page

Pricing normalized from public sources — always verify with the provider.

// model prices

ModelInput /1MOutput /1MContext
gpt-5.6-sol$0.0000$0.00001.1M
OpenAI: GPT-5 Nano (batch)$0.025$0.200400k
OpenAI: gpt-oss-20b$0.030$0.130131k
OpenAI: gpt-oss-120b$0.037$0.170131k
OpenAI: GPT-5 Nano$0.050$0.400400k
OpenAI: gpt-oss-20b (batch)$0.050$0.200131k
OpenAI: GPT-4.1 Nano (batch)$0.050$0.2001.0M
OpenAI: gpt-oss-safeguard-20b$0.075$0.300131k
OpenAI: GPT-4o-mini (batch)$0.075$0.300128k
OpenAI: GPT-5.6 Luna Pro (batch)$0.100$0.6001.1M
OpenAI: GPT-5.6 Luna (batch)$0.100$0.6001.1M
OpenAI: GPT-5.4 Nano (batch)$0.100$0.625400k
OpenAI: GPT-4.1 Nano$0.100$0.4001.0M
OpenAI: GPT-5 Mini (batch)$0.125$1.00400k
OpenAI: gpt-oss-120b (batch)$0.150$0.600131k
OpenAI: GPT-4o-mini$0.150$0.600128k
OpenAI: GPT-4o-mini (2024-07-18)$0.150$0.600128k
GPT-5.6 Luna Pro$0.200$1.201.1M
OpenAI: GPT-5.6 Luna$0.200$1.201.1M
OpenAI: GPT-5.4 Nano$0.200$1.25400k
OpenAI: GPT-4.1 Mini (batch)$0.200$0.8001.0M
OpenAI: GPT-5.1-Codex-Mini$0.250$2.00400k
OpenAI: GPT-5 Mini$0.250$2.00400k
OpenAI: GPT-3.5 Turbo (batch)$0.250$0.75016k
OpenAI: GPT-5.4 Mini (batch)$0.375$2.25400k
OpenAI: GPT-4.1 Mini$0.400$1.601.0M
OpenAI: GPT-3.5 Turbo$0.500$1.5016k
OpenAI: o4 Mini (batch)$0.550$2.20200k
OpenAI: o3 Mini (batch)$0.550$2.20200k
OpenAI: GPT Audio Mini$0.600$2.40128k
OpenAI: GPT-5.1 (batch)$0.625$5.00400k
OpenAI: GPT-5 (batch)$0.625$5.00400k
OpenAI: GPT-5.4 Mini$0.750$4.50400k
OpenAI: GPT-5.2 (batch)$0.875$7.00400k
OpenAI: GPT-5.6 Terra Pro (batch)$1.00$6.001.1M
OpenAI: GPT-5.6 Terra (batch)$1.00$6.001.1M
OpenAI: GPT-5.6 Sol Pro (batch)$1.00$5.001.1M
OpenAI: GPT-5.6 Sol (batch)$1.00$5.001.1M
OpenAI: o3 (batch)$1.00$4.00200k
OpenAI: GPT-4.1 (batch)$1.00$4.001.0M
OpenAI: GPT-3.5 Turbo (older v0613)$1.00$2.004k
OpenAI: o4 Mini High$1.10$4.40200k
o4 Mini$1.10$4.40200k
OpenAI: o3 Mini High$1.10$4.40200k
o3 Mini$1.10$4.40200k
OpenAI: GPT-5.4 (batch)$1.25$7.501.1M
OpenAI: GPT-5.1-Codex-Max$1.25$10.00400k
OpenAI: GPT-5.1-Codex$1.25$10.00400k
OpenAI: GPT-5$1.25$10.00400k
OpenAI: GPT-4o (batch)$1.25$5.00128k
OpenAI: GPT-3.5 Turbo Instruct$1.50$2.004k
OpenAI: GPT-5.3-Codex$1.75$14.00400k
OpenAI: GPT-5.2-Codex$1.75$14.00400k
OpenAI: GPT-5.2 Chat$1.75$14.00128k
OpenAI: GPT-5.2$1.75$14.00400k
GPT-5.6 Terra Pro$2.00$12.001.1M
OpenAI: GPT-5.6 Terra$2.00$12.001.1M
GPT-5.6 Sol Pro$2.00$10.001.1M
OpenAI: GPT-5.6 Sol$2.00$10.001.1M
OpenAI: o3$2.00$8.00200k
OpenAI: GPT-4.1$2.00$8.001.0M
OpenAI: GPT-5.5 (batch)$2.50$15.001.1M
OpenAI: GPT-5.4$2.50$15.001.1M
OpenAI: GPT Audio$2.50$10.00128k
OpenAI: GPT-5 Image Mini$2.50$2.00400k
OpenAI: GPT-4o (2024-11-20)$2.50$10.00128k
OpenAI: GPT-4o (2024-08-06)$2.50$10.00128k
OpenAI: GPT-4o$2.50$10.00128k
OpenAI: GPT-3.5 Turbo 16k$3.00$4.0016k
OpenAI: GPT-6 Astra (batch)$5.00$25.001.1M
OpenAI: GPT-6 Astra Pro (batch)$5.00$25.001.1M
OpenAI: GPT Chat Latest$5.00$30.00400k
OpenAI: GPT-5.5$5.00$30.001.1M
OpenAI: GPT-4o (2024-05-13)$5.00$15.00128k
OpenAI: GPT-4 Turbo (batch)$5.00$15.00128k
OpenAI: GPT-5 Pro (batch)$7.50$60.00400k
OpenAI: GPT-5.4 Image 2$8.00$15.00272k
GPT-6 Astra$10.00$50.001.1M
OpenAI: GPT-6 Astra Pro$10.00$50.001.1M
OpenAI: GPT-5 Image$10.00$10.00400k
GPT-4 Turbo$10.00$30.00128k
OpenAI: GPT-4 Turbo Preview$10.00$30.00128k
OpenAI: GPT-5.2 Pro (batch)$10.50$84.00400k
OpenAI: GPT-5.5 Pro (batch)$15.00$90.001.1M
OpenAI: GPT-5.4 Pro (batch)$15.00$90.001.1M
OpenAI: GPT-5 Pro$15.00$120.00400k
OpenAI: o1$15.00$60.00200k
OpenAI: o3 Pro$20.00$80.00200k
OpenAI: GPT-5.2 Pro$21.00$168.00400k
OpenAI: GPT-5.4 Pro$30.00$180.001.1M
GPT-4$30.00$60.008k
OpenAI: o1-pro$150.00$600.00200k
gpt-5.3-codex——400k
GPT-5.1——400k
GPT-5.5 Pro——1.1M
// faq
$ Does Codex Cloud have a free tier?

Yes — Codex Cloud offers a free tier that we value at roughly $0 in free credits. Always confirm current limits on Codex Cloud's official pricing page — free tiers change without notice.

$ How much does Codex Cloud cost per 1M tokens?

The cheapest model we track at Codex Cloud is $0.0000 per 1M input tokens and $0.0000 per 1M output tokens. This is normalized from Codex Cloud's published pricing — verify with the provider before purchasing, since prices change frequently.

$ Is Codex Cloud safe to use?

Uprouter rates Codex Cloud as low risk. Medium risk. A $0 plan exists but is scoped to quick tasks with no published message allowance, so free capacity is unquantified and shared with ChatGPT Work. Allowances are model-dependent ranges rather than guarantees, Business pricing assumes annual billing and 2+ users, and OpenAI documents fixed model retirement dates that can change which models a plan can reach. Risk ratings are editorial, evidence-based, and never influenced by affiliate relationships.

// community0 reviews

Raw community sentiment, shown unblended. Votes never feed into objective data fields like price, risk, or status — and never into sort order.

No published reviews yet — be the first.

// more_informationprice history · live status · risk & confidence · code snippets

price_history

No recorded changes yet.

live_status

current: unknown

No probes recorded yet.

Uprouter runs its own probes; best-effort, not a guarantee. Probe results depend on our network location and cadence — for production, always use the provider’s own status page.

risk_&_confidence

Low risk
90%

Medium risk. A $0 plan exists but is scoped to quick tasks with no published message allowance, so free capacity is unquantified and shared with ChatGPT Work. Allowances are model-dependent ranges rather than guarantees, Business pricing assumes annual billing and 2+ users, and OpenAI documents fixed model retirement dates that can change which models a plan can reach.

Confidence reflects how much verifiable evidence (official docs, probe history, community reports) backs this entry. Risk is our editorial assessment of operator reliability and terms — not financial advice.

code_snippets

# Codex Cloud's own API — get a key from their dashboard
curl https://openai.com/codex/chat/completions \
  -H "Authorization: Bearer THEIR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5-6-sol",
    "messages": [{ "role": "user", "content": "Hello" }]
  }'

Direct to the provider — Uprouter receives nothing; verify their current pricing before purchasing.

// similar_providersscored by Paid API signals

Ranked by neutral similarity signals only — live status, free-tier shape and free-credit proximity. Commercial relationships never influence this list.