# GPT-5.5 vs Step 5 Preview

As of Oct 15, 2026, GPT-5.5 leads Step 5 Preview in 4 of 5 shared categories: General LLM, Reasoning, Long context, and Factuality.

GPT-5.5: $11.25 per 1M blended tokens.

Step 5 Preview: $1.4249999999999998 per 1M blended tokens.

GPT-5.5: closed weights.

Step 5 Preview: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads Step 5 Preview in General LLM at #22 against #77.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.5 leads Step 5 Preview in Reasoning at #26 against #63.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Step 5 Preview leads GPT-5.5 in Coding › Web dev at #33 against #48.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.5 leads Step 5 Preview in Long context at #26 against #68.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads Step 5 Preview in Factuality at #5 against #69.

As of Oct 15, 2026, GPT-5.5 is near state of the art, rank #5 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, Step 5 Preview is ranked #33 in Coding › Web dev (since Oct 15, 2026; sources LMArena WebDev; methodology v1.0).