Claude Opus 4.8 vs DeepSeek V4.1 Flash
As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in 6 of 8 shared categories: General LLM, Reasoning, Science, Long context, Vision, and Factuality.
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
DeepSeek V4.1 Flash
Yes. Yes on General LLM (best per dollar); Reasoning (best per dollar). Not the overall leader.
| Category | Claude Opus 4.8 | DeepSeek V4.1 Flash |
|---|---|---|
| General LLM | #20 · #20 in General LLM Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in General LLM Margin 19.72789115646259 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #10 · #10 in Reasoning Margin 7.534246575342465 LMArena leaderboard dataset · Oct 13, 2026 | #27 · #27 in Reasoning Margin 19.178082191780817 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 | #27 · #27 in Science Margin — Epoch AI benchmarking hub · May 28, 2026 | #36 · #36 in Science Margin — Epoch AI benchmarking hub · Sep 9, 2026 |
| Coding | #12 · #12 in Coding Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #12 · #12 in Coding › Agentic Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #33 · Was SOTA · Coding › Web dev Margin 29.90654205607477 LMArena leaderboard dataset · Oct 13, 2026 | #19 · #19 in Coding › Web dev Margin 16.822429906542055 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #10 · Was SOTA · Long context Margin 6.802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #32 · #32 in Long context Margin 21.768707482993193 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #13 · #13 in Vision Margin 36.842105263157904 Epoch AI benchmarking hub · May 28, 2026 | #21 · #21 in Vision Margin 57.89473684210526 Epoch AI benchmarking hub · Sep 9, 2026 |
| Factuality | #21 · #21 in Factuality Margin 16.417910447761187 LMArena leaderboard dataset · Oct 13, 2026 | #22 · #22 in Factuality Margin 17.164179104477626 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #12 · #12 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2026 | #8 · #8 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 9, 2026 |
Claude Opus 4.8: $10 per 1M blended tokens.
DeepSeek V4.1 Flash: $0.23463 per 1M blended tokens.
Claude Opus 4.8: closed weights.
DeepSeek V4.1 Flash: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in General LLM at #20 against #29.
Reasoning: As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in Reasoning at #10 against #27.
Science: As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in Science at #27 against #36.
Coding › Web dev: As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4.8 in Coding › Web dev at #19 against #33.
Long context: As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in Long context at #10 against #32.
Vision: As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in Vision at #13 against #21.
Factuality: As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in Factuality at #21 against #22.
Abstraction (ARC): As of Oct 14, 2026, DeepSeek V4.1 Flash leads Claude Opus 4.8 in Abstraction (ARC) at #8 against #12.
Claude Opus 4.8 · DeepSeek V4.1 Flash
Claude Opus 4.8 or DeepSeek V4.1 Flash?
As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in 6 of 8 shared categories: General LLM, Reasoning, Science, Long context, Vision, and Factuality.
Claude Opus 4.8 or DeepSeek V4.1 Flash for General LLM?
As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in General LLM at #20 against #29.
Claude Opus 4.8 or DeepSeek V4.1 Flash for Reasoning?
As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in Reasoning at #10 against #27.
Claude Opus 4.8 or DeepSeek V4.1 Flash for Science?
As of Oct 14, 2026, Claude Opus 4.8 leads DeepSeek V4.1 Flash in Science at #27 against #36.