Claude Opus 4.8 vs Kimi K2 5 Instant
As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
Kimi K2 5 Instant
#77 Best current rank: #77 in Coding › Web dev, as of Oct 15, 2026.
| Category | Claude Opus 4.8 | Kimi K2 5 Instant |
|---|---|---|
| General LLM | #21 · #21 in General LLM Margin 11.170212765957444 LMArena leaderboard dataset · Oct 13, 2026 | #103 · #103 in General LLM Margin 54.787234042553195 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #10 · #10 in Reasoning Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #89 · #89 in Reasoning Margin 47.87234042553192 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 | — |
| 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 | #35 · Was SOTA · Coding › Web dev Margin 27.200000000000003 LMArena leaderboard dataset · Oct 13, 2026 | #77 · #77 in Coding › Web dev Margin 60.8 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #10 · Was SOTA · Long context Margin 5.319148936170208 LMArena leaderboard dataset · Oct 13, 2026 | #95 · #95 in Long context Margin 50.53191489361702 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #13 · #13 in Vision Margin 36.842105263157904 Epoch AI benchmarking hub · May 28, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #24 · #24 in Factuality Margin 14.534883720930239 LMArena leaderboard dataset · Oct 13, 2026 | #107 · #107 in Factuality Margin 62.7906976744186 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #12 · #12 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · May 28, 2026 | — |
Claude Opus 4.8: $10 per 1M blended tokens.
Kimi K2 5 Instant: price per 1M tokens is unset in the catalog.
Claude Opus 4.8: closed weights.
Kimi K2 5 Instant: open weights.
General LLM: As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in General LLM at #21 against #103.
Reasoning: As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in Reasoning at #10 against #89.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in Coding › Web dev at #35 against #77.
Long context: As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in Long context at #10 against #95.
Factuality: As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in Factuality at #24 against #107.
Claude Opus 4.8 · Kimi K2 5 Instant
Claude Opus 4.8 or Kimi K2 5 Instant?
As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.8 or Kimi K2 5 Instant for General LLM?
As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in General LLM at #21 against #103.
Claude Opus 4.8 or Kimi K2 5 Instant for Reasoning?
As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in Reasoning at #10 against #89.
Claude Opus 4.8 or Kimi K2 5 Instant for Coding › Web dev?
As of Oct 15, 2026, Claude Opus 4.8 leads Kimi K2 5 Instant in Coding › Web dev at #35 against #77.