# Claude Sonnet 5.5 vs Step 5 Preview

As of Oct 15, 2026, Claude Sonnet 5.5 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.

Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.

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

Claude Sonnet 5.5: closed weights.

Step 5 Preview: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Sonnet 5.5 leads Step 5 Preview in General LLM at #29 against #77.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads Step 5 Preview in Reasoning at #18 against #63.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Step 5 Preview in Coding › Web dev at #3 against #33.
- Which to pick, Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads Step 5 Preview in Long context at #11 against #68.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads Step 5 Preview in Factuality at #17 against #69.

As of Oct 15, 2026, Claude Sonnet 5.5 is tied for state of the art in Coding (since Oct 6, 2026; sources Terminal-Bench 4.0; 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).