Claude Sonnet 5.5 vs DeepSeek V3
As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in 2 of 3 shared categories: Science and Long context.
Claude Sonnet 5.5
Yes. SOTA in Coding (tied), Coding › Agentic (tied), and Vision (tied).
DeepSeek V3
It used to be. Was SOTA in General LLM.
| Category | Claude Sonnet 5.5 | DeepSeek V3 |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 15.425531914893611 LMArena leaderboard dataset · Oct 13, 2026 | #12 · #12 in General LLM Margin — LMArena leaderboard dataset · Mar 17, 2025 |
| Reasoning | #18 · #18 in Reasoning Margin 10.106382978723403 LMArena leaderboard dataset · Oct 13, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Feb 11, 2025 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Jan 22, 2025 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 2026 | #114 · #114 in Science Margin — Epoch AI benchmarking hub · Dec 26, 2024 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Mar 11, 2025 |
| 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 | — |
| Long context | #11 · #11 in Long context Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #185 · #185 in Long context Margin 98.40425531914893 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 | — |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
DeepSeek V3: price per 1M tokens is unset in the catalog.
Claude Sonnet 5.5: closed weights.
DeepSeek V3: open weights.
General LLM: As of Oct 15, 2026, DeepSeek V3 leads Claude Sonnet 5.5 in General LLM at #12 against #29.
Science: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in Science at #3 against #114.
Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in Long context at #11 against #185.
Claude Sonnet 5.5 · DeepSeek V3
Claude Sonnet 5.5 or DeepSeek V3?
As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in 2 of 3 shared categories: Science and Long context.
Claude Sonnet 5.5 or DeepSeek V3 for General LLM?
As of Oct 15, 2026, DeepSeek V3 leads Claude Sonnet 5.5 in General LLM at #12 against #29.
Claude Sonnet 5.5 or DeepSeek V3 for Science?
As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in Science at #3 against #114.
Claude Sonnet 5.5 or DeepSeek V3 for Long context?
As of Oct 15, 2026, Claude Sonnet 5.5 leads DeepSeek V3 in Long context at #11 against #185.