Model comparison
GPT-5.2-Codex vs GPT-5.1-Codex
- Input
- $1.75
- Output
- $14.00
- Context
- 400K
- Released
- 2025-12-11
- Input
- $1.25 / 1M tokens
- Output
- $10.00 / 1M tokens
- Context
- 400K
- Released
- 2025-11-19
GPT-5.1-Codex is cheaper on input tokens ($1.3 vs $1.8 per 1M, 1.4×).
Specs and pricing side by side
| Spec | GPT-5.2-Codex | GPT-5.1-Codex |
|---|---|---|
| Maker | OpenAI | OpenAIsame |
| Released | 2025-12-11 | 2025-11-19 |
| Context window | 400K | 400Ksame |
| Max output | 128K | 128Ksame |
| Input price | $1.75 | $1.25 / 1M tokens |
| Output price | $14.00 | $10.00 / 1M tokens |
| Parameters | Undisclosed | not published |
| License | Proprietary | Proprietary (OpenAI API) |
| Weights | API only | API onlysame |
| Modalities | Text, Vision | Text, Visionsame |
| Knowledge cutoff | Aug 2025 | September 30, 2024 |
Benchmarks both models report
These two models have no benchmark in common in our registry, so there is no like-for-like score to compare. See each model’s own results: GPT-5.2-Codex, GPT-5.1-Codex.
Which one should you pick?
Pick GPT-5.2-Codex if…
- Your use case is: reach for it for long, independent execution of complex engineering tasks inside Codex (the CLI, IDE, or cloud).
Pick GPT-5.1-Codex if…
- Cost matters: input tokens cost 1.4× less ($1.3 vs $1.8 per 1M).
- Your use case is: autonomous, multi-step coding tasks such as opening and iterating on pull requests.
FAQ
Which is better, GPT-5.2-Codex or GPT-5.1-Codex?
GPT-5.1-Codex is cheaper on input tokens ($1.3 vs $1.8 per 1M, 1.4×). The better pick depends on whether you value benchmark scores, price per token, context length or openness for your workload.
How much cheaper is GPT-5.1-Codex?
GPT-5.2-Codex: $1.75 input, $14.00 output. GPT-5.1-Codex: $1.25 / 1M tokens input, $10.00 / 1M tokens output (list API prices as published by each maker).
What are the context windows of GPT-5.2-Codex and GPT-5.1-Codex?
GPT-5.2-Codex offers 400K with up to 128K output; GPT-5.1-Codex offers 400K with up to 128K output.
Is GPT-5.2-Codex newer than GPT-5.1-Codex?
GPT-5.2-Codex was released 2025-12-11; GPT-5.1-Codex was released 2025-11-19.