Claude Opus 5.5 vs DeepSeek R1 0528
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
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.
DeepSeek R1 0528
It used to be. Was SOTA in General LLM.
| Category | Claude Opus 5.5 | DeepSeek R1 0528 |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #92 · #92 in General LLM Margin 62.585034013605444 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #98 · #98 in Reasoning Margin 67.8082191780822 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 | #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 | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #114 · #114 in Long context Margin 77.55102040816327 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | — |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | — |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #70 · #70 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2025 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
DeepSeek R1 0528: $0.9125000000000001 per 1M blended tokens.
Claude Opus 5.5: closed weights.
DeepSeek R1 0528: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in General LLM at #2 against #92.
Reasoning: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in Reasoning at #1 against #98.
Science: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in Science at #31 against #78.
Long context: As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in Long context at #1 against #114.
Abstraction (ARC): As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in Abstraction (ARC) at #1 against #70.
Claude Opus 5.5 · DeepSeek R1 0528
Claude Opus 5.5 or DeepSeek R1 0528?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in 5 of 5 shared categories: General LLM, Reasoning, Science, Long context, and Abstraction (ARC).
Claude Opus 5.5 or DeepSeek R1 0528 for General LLM?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in General LLM at #2 against #92.
Claude Opus 5.5 or DeepSeek R1 0528 for Reasoning?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in Reasoning at #1 against #98.
Claude Opus 5.5 or DeepSeek R1 0528 for Science?
As of Oct 14, 2026, Claude Opus 5.5 leads DeepSeek R1 0528 in Science at #31 against #78.