# The January GPT-4 Turbo is lazier than the last version

> With that in mind, I've been benchmarking the new model using aider's existing

- Skill: `tools-only/the-january-gpt-4-turbo-is-lazier-than-the-last-version` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add tools-only/the-january-gpt-4-turbo-is-lazier-than-the-last-version`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tools-only/the-january-gpt-4-turbo-is-lazier-than-the-last-version/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tools-only (https://skillmd.com/u/tools-only)
- Updated: 2026-09-29
- Page: https://skillmd.com/skills/tools-only/the-january-gpt-4-turbo-is-lazier-than-the-last-version

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# The January GPT-4 Turbo is lazier than the last version

[![benchmark results](/assets/benchmarks-0125.svg)](https://aider.chat/assets/benchmarks-0125.svg)

[OpenAI just released a new version of GPT-4 Turbo](https://openai.com/blog/new-embedding-models-and-api-updates).
This new model is intended to reduce the "laziness" that has been widely observed with the previous `gpt-4-1106-preview` model:

> Today, we are releasing an updated GPT-4 Turbo preview model, gpt-4-0125-preview. This model completes tasks like code generation more thoroughly than the previous preview model and is intended to reduce cases of “laziness” where the model doesn’t complete a task.

With that in mind, I've been benchmarking the new model using
aider's existing
[lazy coding benchmark](https://aider.chat/docs/unified-diffs.html).

## Benchmark results

Overall,
the new `gpt-4-0125-preview` model seems lazier
than the November `gpt-4-1106-preview` model:

- It gets worse benchmark scores when using the [unified diffs](https://aider.chat/docs/unified-diffs.html) code editing format.
- Using aider's older SEARCH/REPLACE block editing format, the new January model outperforms the older November model. But it still performs worse than both models using unified diffs.

## Related reports

This is one in a series of reports
that use the aider benchmarking suite to assess and compare the code
editing capabilities of OpenAI's GPT models.
You can review the other reports
for additional information:

- [GPT code editing benchmarks](https://aider.chat/docs/benchmarks.html) evaluates the March and June versions of GPT-3.5 and GPT-4.
- [Code editing benchmarks for OpenAI's "1106" models](https://aider.chat/docs/benchmarks-1106.html).
- [Aider's lazy coding benchmark](https://aider.chat/docs/unified-diffs.html).