Which OpenAI model is best for coding?

GPT-5.6 Sol had the lowest relative bug rate of the 3 ranked OpenAI models from Jun 22 to Oct 11, 2026 (0.65, 35% fewer counted bugs than the all-model average).

Which OpenAI model writes the most bugs?

As of Oct 13, 2026, GPT-6.1 Sol had the highest relative bug rate among OpenAI models (1.23, 23% more counted bugs than the all-model average), statistically tied with GPT-6 Astra.

Updated Oct 13, 2026

OpenAI models for coding, ranked

As of Oct 13, 2026, GPT-5.6 Sol had the lowest relative bug rate of the 3 ranked OpenAI models (0.65, 35% fewer counted bugs than the all-model average).

Ranking window Jun 22 to Oct 11, 2026

OpenAI models ranked by relative bug rate, where 1.00 is the all-model average. Lower values are better.
Rank	Model	Rate
1	GPT-5.6 Sol	0.65
2= (statistically tied)	GPT-6 Astra	1.13
3= (statistically tied)	GPT-6.1 Sol	1.23

1.00 = all-model average · lower is better · = statistically tied

Full Bug Bench ranking →Methodology →

OpenAI vs Anthropic

Anthropic's top-ranked model is Claude Fable 5.1. GPT-5.6 Sol had 40% fewer counted bugs per line than Claude Fable 5.1 (0.65 vs 1.09). GPT-5.6 Sol vs Claude Fable 5.1

Other providers

Anthropic models

Questions and answers

Which OpenAI model is best for coding?: GPT-5.6 Sol had the lowest relative bug rate of the 3 ranked OpenAI models from Jun 22 to Oct 11, 2026 (0.65, 35% fewer counted bugs than the all-model average).
Which OpenAI model writes the most bugs?: As of Oct 13, 2026, GPT-6.1 Sol had the highest relative bug rate among OpenAI models (1.23, 23% more counted bugs than the all-model average), statistically tied with GPT-6 Astra.