Claude Opus 5 vs Grok 4.3
As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Vision, and Factuality.
Claude Opus 5
Close. Near-SOTA in Factuality, rank #4.
Grok 4.3
#32 Best current rank: #32 in Vision, as of Oct 15, 2026.
| Category | Claude Opus 5 | Grok 4.3 |
|---|---|---|
| General LLM | #11 · Was SOTA · General LLM Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #85 · #85 in General LLM Margin 45.212765957446805 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #9 · Was SOTA · Reasoning Margin 5.319148936170208 LMArena leaderboard dataset · Oct 13, 2026 | #96 · #96 in Reasoning Margin 51.59574468085106 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 | #41 · #41 in Science Margin — Epoch AI benchmarking hub · Apr 17, 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 · Near-SOTA · Coding › Web dev Margin 4 LMArena leaderboard dataset · Oct 13, 2026 | #95 · #95 in Coding › Web dev Margin 75.2 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #9 · Was SOTA · Long context Margin 4.7872340425531945 LMArena leaderboard dataset · Oct 13, 2026 | #94 · #94 in Long context Margin 50 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #12 · #12 in Vision Margin 36.8421052631579 Epoch AI benchmarking hub · Jul 24, 2026 | #32 · #32 in Vision Margin 97.36842105263158 Epoch AI benchmarking hub · Apr 17, 2026 |
| Factuality | #4 · Near-SOTA · Factuality Margin 2.9069767441860535 LMArena leaderboard dataset · Oct 13, 2026 | #111 · #111 in Factuality Margin 65.11627906976744 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.
Grok 4.3: $1.5625000000000002 per 1M blended tokens.
Claude Opus 5: closed weights.
Grok 4.3: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in General LLM at #11 against #85.
Reasoning: As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in Reasoning at #9 against #96.
Science: As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in Science at #12 against #41.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in Coding › Web dev at #6 against #95.
Long context: As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in Long context at #9 against #94.
Vision: As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in Vision at #12 against #32.
Factuality: As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in Factuality at #4 against #111.
Claude Opus 5 or Grok 4.3?
As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in 7 of 7 shared categories: General LLM, Reasoning, Science, Coding › Web dev, Long context, Vision, and Factuality.
Claude Opus 5 or Grok 4.3 for General LLM?
As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in General LLM at #11 against #85.
Claude Opus 5 or Grok 4.3 for Reasoning?
As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in Reasoning at #9 against #96.
Claude Opus 5 or Grok 4.3 for Science?
As of Oct 15, 2026, Claude Opus 5 leads Grok 4.3 in Science at #12 against #41.