OpenAI Codex
OpenAI's coding agent that writes code, runs tasks and builds multi-step automated workflows, tied to ChatGPT plans and the API.
How the 6.0 was reached
- Quality of output7/10
Independent benchmarks show 64.6% on SWE-bench Pro and 88.8% on Terminal-Bench for the underlying model. codeant.ai
- Ease of usen/a
no evidence found
- Pricing value5/10
Per-token API prices are published ($2/$10 per 1M tokens), but ChatGPT plan pricing for Codex is not itemized and usage cost is hard to predict. openai.com
- API and integration quality7/10
OpenAI API is documented with published per-token pricing; no Codex-specific SDK or integration facts were listed. openai.com
- Solves the problem it claims to solve5/10
Only the vendor's own description of multi-step coding workflows; no independent evidence of that promise. openai.com
6.0/10 is the mean of the 4 criteria that apply. Scored on the five-criteria rubric v1, 29 September 2026. How scoring works
Pricing
- Free, Go, Plus, Pro, Business and Enterprise tiers exist
- Codex plan pricing is not itemized in the provided data
- Per-token billing
- Per-token billing
Key Features
- Writes code and runs tasks
- Builds multi-step workflows that automate coding work
- GPT-6 Astra listed with 1.05M context and 128K max output tokens
- Available through the OpenAI API with published token prices
Pros & Cons
Pros
- Independent benchmarks put the underlying model at 64.6% on SWE-bench Pro and 88.8% on Terminal-Bench
- Published per-token API prices
- Large context window on the listed model
Cons
- Codex usage cost inside ChatGPT plans is not itemized and hard to predict
- No Codex-specific SDK or integration facts were listed
- Workflow claims rest on OpenAI's own description
- No ease-of-use score, as the evidence did not cover setup
Codex suits developers already paying for ChatGPT or the OpenAI API who want an agent from the same vendor. Buyers who need predictable spend or proof of the workflow claims should look elsewhere for now. The 6 rating reflects a strong model with little clarity on plans and fit.
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