# Codex CLI Review & Benchmarks (2026): Price, Context, Specs | Alher Tech

> Codex CLI by OpenAI: benchmarks, pricing, context window, strengths and use cases. Data from official benchmark sources.

- Canonical page: https://alhertech.com/en/ai-comparison/codex-cli/
- Site: Alher Tech (custom software, AI agents and SEO engineering, https://alhertech.com/)
- Contact: https://alhertech.com/en/contact/

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Last updated: April 22, 2026

## Specs

- **Vendor**: OpenAI
- **Released**: April 16, 2025
- **Context window**: 500K tokens
- **Input**: $9 / M tokens
- **Output**: $36 / M tokens

## Benchmarks

- **mmlu**: 88.6
- **gpqa**: 60.8
- **humanEval**: 95.5
- **arenaElo**: 1408
- **sweBench**: 70
- **sweBenchPro**: 64
- **liveCodeBench**: 84
- **aiderPolyglot**: 84
- **terminalBench**: 52
- **mmluPro**: 82
- **hle**: 18
- **aime**: 86
- **math500**: 95

## Strengths

- Open-source terminal agent on GPT-5.4 Codex: fits enterprise security reviews
- Automates the boring half of SaaS builds: CRUD endpoints, auth, tests, CI config
- MCP and plugin ecosystem that connects to Stripe, Supabase, AWS, Azure for B2B wiring

## Weaknesses

- Ties your SaaS billing to OpenAI
- Terminal-first UX is a barrier for the non-technical half of most founding teams
- Less UI polish than Cursor for live client demos

## Best for

- Shipping production-grade SaaS for SMEs and mid-market clients
- CI-driven PR factories that keep B2B backends maintained after launch
- Agencies building white-label SaaS for multiple enterprise customers

[Compare with other AI models](https://alhertech.com/en/ai-comparison/)