Claude Opus 5.5 vs Step 5 Preview
As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
Step 5 Preview
#31 Best current rank: #31 in Coding › Web dev, as of Oct 14, 2026.
| Category | Claude Opus 5.5 | Step 5 Preview |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #60 · #60 in General LLM Margin 40.816326530612244 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #49 · #49 in Reasoning Margin 34.246575342465746 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | — |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Coding › Web dev Margin 28.037383177570092 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #56 · #56 in Long context Margin 38.095238095238095 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #57 · #57 in Factuality Margin 43.28358208955224 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | — |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
Step 5 Preview: $1.4249999999999998 per 1M blended tokens.
Claude Opus 5.5: closed weights.
Step 5 Preview: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in General LLM at #2 against #60.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in Reasoning at #1 against #49.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in Coding › Web dev at #1 against #31.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in Long context at #1 against #56.
Factuality: As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in Factuality at #1 against #57.
Claude Opus 5.5 · Step 5 Preview
Claude Opus 5.5 or Step 5 Preview?
As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5 or Step 5 Preview for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in General LLM at #2 against #60.
Claude Opus 5.5 or Step 5 Preview for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in Reasoning at #1 against #49.
Claude Opus 5.5 or Step 5 Preview for Coding › Web dev?
As of Oct 14, 2026, Claude Opus 5.5 leads Step 5 Preview in Coding › Web dev at #1 against #31.