Claude Opus 5 vs Kimi K2 5 Instant
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
Kimi K2 5 Instant
#71 Best current rank: #71 in Reasoning, as of Oct 14, 2026.
| Category | Claude Opus 5 | Kimi K2 5 Instant |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 7.482993197278915 LMArena leaderboard dataset · Oct 13, 2026 | #80 · #80 in General LLM Margin 54.42176870748299 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 6.849315068493155 LMArena leaderboard dataset · Oct 13, 2026 | #71 · #71 in Reasoning Margin 49.31506849315068 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 | #12 · #12 in Science Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
| Coding | #4 · #4 in Coding Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 |
| Coding › Agentic | #4 · #4 in Coding › Agentic Margin 22.727272727272734 Terminal-Bench Harbor Hub · Oct 6, 2026 | — |
| Coding › Web dev | #6 · Was SOTA · Coding › Web dev Margin 4.672897196261687 LMArena leaderboard dataset · Oct 13, 2026 | #71 · #71 in Coding › Web dev Margin 65.42056074766356 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 6.122448979591837 LMArena leaderboard dataset · Oct 13, 2026 | #78 · #78 in Long context Margin 53.06122448979592 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 9, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 3.731343283582092 LMArena leaderboard dataset · Oct 13, 2026 | #85 · #85 in Factuality Margin 64.17910447761194 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #3 · #3 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Jul 24, 2026 | — |
Claude Opus 5: $10 per 1M blended tokens.
Kimi K2 5 Instant: price per 1M tokens is unset in the catalog.
Claude Opus 5: closed weights.
Kimi K2 5 Instant: open weights.
General LLM: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in General LLM at #11 against #80.
Reasoning: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in Reasoning at #9 against #71.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in Coding › Web dev at #6 against #71.
Long context: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in Long context at #9 against #78.
Factuality: As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in Factuality at #4 against #85.
Claude Opus 5 · Kimi K2 5 Instant
Claude Opus 5 or Kimi K2 5 Instant?
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.
Claude Opus 5 or Kimi K2 5 Instant for General LLM?
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in General LLM at #11 against #80.
Claude Opus 5 or Kimi K2 5 Instant for Reasoning?
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in Reasoning at #9 against #71.
Claude Opus 5 or Kimi K2 5 Instant for Coding › Web dev?
As of Oct 14, 2026, Claude Opus 5 leads Kimi K2 5 Instant in Coding › Web dev at #6 against #71.