# GPT-5.4 Codex Review & Benchmarks (2026): Price, Context, Specs | Alher Tech

> GPT-5.4 Codex by OpenAI: benchmarks, pricing, context window, strengths and use cases. Data from official benchmark sources.

- Canonical page: https://alhertech.com/en/ai-comparison/gpt-5-4-codex/
- 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**: February 20, 2026
- **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

- Current best HumanEval of any OpenAI model
- Handles multi-hour coding sessions without drift
- Fine-tuned for tool-calling via Codex CLI

## Weaknesses

- Not positioned for general chat (use GPT-5.5)
- Still weaker than Opus 4.7 on agent reliability
- Pricing sits above GPT-5 Codex at modest quality gains

## Best for

- Automated PR factories
- Long refactor runs where drift matters
- Enterprise Codex deployments on tier 5

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