Claude Opus 4.7 vs Step 3.5 Flash
As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.7
Close. Near-SOTA in Reasoning, rank #4.
Step 3.5 Flash
#128 Best current rank: #128 in Factuality, as of Oct 15, 2026.
| Category | Claude Opus 4.7 | Step 3.5 Flash |
|---|---|---|
| General LLM | #5 · Near-SOTA · General LLM Margin 2.659574468085111 LMArena leaderboard dataset · Oct 13, 2026 | #159 · #159 in General LLM Margin 84.57446808510639 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #4 · Near-SOTA · Reasoning Margin 2.659574468085111 LMArena leaderboard dataset · Oct 13, 2026 | #162 · #162 in Reasoning Margin 86.70212765957447 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #10 · #10 in Math Margin 20 Epoch AI benchmarking hub · Apr 16, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #34 · #34 in Science Margin — Epoch AI benchmarking hub · Apr 16, 2026 | — |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Web dev | #34 · Was SOTA · Coding › Web dev Margin 26.400000000000006 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #4 · Near-SOTA · Long context Margin 2.1276595744680833 LMArena leaderboard dataset · Oct 13, 2026 | #156 · #156 in Long context Margin 82.97872340425532 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #20 · Was SOTA · Vision Margin 55.26315789473684 Epoch AI benchmarking hub · Apr 16, 2026 | — |
| Factuality | #13 · #13 in Factuality Margin 8.139534883720927 LMArena leaderboard dataset · Oct 13, 2026 | #128 · #128 in Factuality Margin 75 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #11 · #11 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Apr 16, 2026 | — |
Claude Opus 4.7: $10 per 1M blended tokens.
Step 3.5 Flash: $0.15 per 1M blended tokens.
Claude Opus 4.7: closed weights.
Step 3.5 Flash: open weights.
General LLM: As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in General LLM at #5 against #159.
Reasoning: As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in Reasoning at #4 against #162.
Long context: As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in Long context at #4 against #156.
Factuality: As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in Factuality at #13 against #128.
Claude Opus 4.7 · Step 3.5 Flash
Claude Opus 4.7 or Step 3.5 Flash?
As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in 4 of 4 shared categories: General LLM, Reasoning, Long context, and Factuality.
Claude Opus 4.7 or Step 3.5 Flash for General LLM?
As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in General LLM at #5 against #159.
Claude Opus 4.7 or Step 3.5 Flash for Reasoning?
As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in Reasoning at #4 against #162.
Claude Opus 4.7 or Step 3.5 Flash for Long context?
As of Oct 15, 2026, Claude Opus 4.7 leads Step 3.5 Flash in Long context at #4 against #156.