# GPT-5.4 vs Step 3.5 Flash

As of Oct 14, 2026, GPT-5.4 leads Step 3.5 Flash in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.

GPT-5.4: $5.625 per 1M blended tokens.

Step 3.5 Flash: $0.15 per 1M blended tokens.

GPT-5.4: closed weights.

Step 3.5 Flash: open weights.

- Which to pick, General LLM: As of Oct 14, 2026, GPT-5.4 leads Step 3.5 Flash in General LLM at #28 against #123.
- Which to pick, Reasoning: As of Oct 14, 2026, GPT-5.4 leads Step 3.5 Flash in Reasoning at #29 against #124.
- Which to pick, Long context: As of Oct 14, 2026, GPT-5.4 leads Step 3.5 Flash in Long context at #34 against #119.
- Which to pick, Factuality: As of Oct 14, 2026, GPT-5.4 leads Step 3.5 Flash in Factuality at #6 against #99.

As of Oct 14, 2026, GPT-5.4 is a former state-of-the-art holder in General LLM (since Apr 10, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).

As of Oct 14, 2026, Step 3.5 Flash is ranked #99 in Factuality (since Oct 14, 2026; sources LMArena Text factuality; methodology v1.0).