Model comparison
GPT-5.1-Codex vs GPT-4.1
Capability radar, value bars, and side-by-side posture.
GPT-5.1-Codex
Not scored
value score
GPT-4.1
90
value score
GPT-5.1-Codex ctx
—
GPT-4.1 ctx
1.0M
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- GPT-4.190
Attribute tape
| Field | GPT-5.1-Codex | GPT-4.1 |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Context | — | 1.0M |
| Modalities | Text, Code, Image | |
| Openness | — | Proprietary Model |
| Speed | — | — |
| Price | — | $2/1M in · $8/1M out |
| Value score | — | 90 |
| Summary | GPT-5.1-Codex is OpenAI's agentic coding model, optimized for long-running software engineering tasks such as feature development, refactoring, debugging, and code review in Codex-like environments. It is distinct from GPT-5.1 in being purpose-built for developer workflows rather than general-purpose conversation. | Long-context GPT for developer workflows. |