Claude Sonnet 5.5 vs DeepSeek R1 0528
As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in 4 of 4 shared categories: General LLM, Reasoning, Science, and Long context.
Claude Sonnet 5.5
Yes. SOTA in co-SOTA in Coding, co-SOTA in Coding › Agentic and co-SOTA in Vision.
DeepSeek R1 0528
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 5.5 | DeepSeek R1 0528 |
|---|---|---|
| General LLM | #27 · #27 in General LLM Margin 18.367346938775512 LMArena leaderboard dataset · Oct 13, 2026 | #92 · #92 in General LLM Margin 62.585034013605444 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 13.013698630136986 LMArena leaderboard dataset · Oct 13, 2026 | #98 · #98 in Reasoning Margin 67.8082191780822 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 | #78 · #78 in Science Margin — Epoch AI benchmarking hub · May 28, 2025 |
| 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 1.8691588785046775 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #11 · #11 in Long context Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #114 · #114 in Long context Margin 77.55102040816327 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | — |
| Factuality | #16 · #16 in Factuality Margin 12.68656716417911 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | — | #70 · #70 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2025 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
DeepSeek R1 0528: $0.9125000000000001 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
DeepSeek R1 0528: open weights.
General LLM: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in General LLM at #27 against #92.
Reasoning: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in Reasoning at #18 against #98.
Science: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in Science at #3 against #78.
Long context: As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in Long context at #11 against #114.
Claude Sonnet 5.5 · DeepSeek R1 0528
Claude Sonnet 5.5 or DeepSeek R1 0528?
As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in 4 of 4 shared categories: General LLM, Reasoning, Science, and Long context.
Claude Sonnet 5.5 or DeepSeek R1 0528 for General LLM?
As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in General LLM at #27 against #92.
Claude Sonnet 5.5 or DeepSeek R1 0528 for Reasoning?
As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in Reasoning at #18 against #98.
Claude Sonnet 5.5 or DeepSeek R1 0528 for Science?
As of Oct 14, 2026, Claude Sonnet 5.5 leads DeepSeek R1 0528 in Science at #3 against #78.