Claude Sonnet 5.5 vs Qwen3 5 Flash
As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in Coding (tied), Coding › Agentic (tied), and Vision (tied).
Qwen3 5 Flash
#66 Best recorded rank: #66 in Science, as of Oct 15, 2026.
| Category | Claude Sonnet 5.5 | Qwen3 5 Flash |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 15.425531914893611 LMArena leaderboard dataset · Oct 13, 2026 | #154 · #154 in General LLM Margin 81.91489361702128 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 10.106382978723403 LMArena leaderboard dataset · Oct 13, 2026 | #157 · #157 in Reasoning Margin 84.04255319148936 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #66 · #66 in Science Margin — Epoch AI benchmarking hub · Feb 25, 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 | #3 · Near-SOTA · Coding › Web dev Margin 1.5999999999999943 LMArena leaderboard dataset · Oct 13, 2026 | #114 · #114 in Coding › Web dev Margin 90.4 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #159 · #159 in Long context Margin 84.57446808510639 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | — |
| Factuality | #17 · #17 in Factuality Margin 10.465116279069761 LMArena leaderboard dataset · Oct 13, 2026 | #131 · #131 in Factuality Margin 76.74418604651163 LMArena leaderboard dataset · Oct 13, 2026 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
Qwen3 5 Flash: price per 1M tokens is unset in the catalog.
Claude Sonnet 5.5: closed weights.
Qwen3 5 Flash: closed weights.
General LLM: As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in General LLM at #29 against #154.
Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in Reasoning at #18 against #157.
Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in Science at #3 against #66.
Coding › Web dev: As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in Coding › Web dev at #3 against #114.
Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in Long context at #11 against #159.
Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in Factuality at #17 against #131.
Claude Sonnet 5.5 · Qwen3 5 Flash
Claude Sonnet 5.5 or Qwen3 5 Flash?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in 6 of 6 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, and Factuality.
Claude Sonnet 5.5 or Qwen3 5 Flash for General LLM?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in General LLM at #29 against #154.
Claude Sonnet 5.5 or Qwen3 5 Flash for Reasoning?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in Reasoning at #18 against #157.
Claude Sonnet 5.5 or Qwen3 5 Flash for Science?
As of Oct 15, 2026, Claude Sonnet 5.5 leads Qwen3 5 Flash in Science at #3 against #66.