Claude Opus 4.8 vs Claude Sonnet 5
As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in 8 of 8 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.8
It used to be. Was SOTA in Coding › Web dev.
Claude Sonnet 5
#19 Best current rank: #19 in Coding, as of Oct 14, 2026.
| Category | Claude Opus 4.8 | Claude Sonnet 5 |
|---|---|---|
| General LLM | #20 · #20 in General LLM Margin 13.605442176870753 LMArena leaderboard dataset · Oct 13, 2026 | #39 · #39 in General LLM Margin 26.530612244897952 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #10 · #10 in Reasoning Margin 7.534246575342465 LMArena leaderboard dataset · Oct 13, 2026 | #34 · #34 in Reasoning Margin 23.972602739726028 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 | #32 · #32 in Science Margin — Epoch AI benchmarking hub · Jun 30, 2026 |
| Coding | #12 · #12 in Coding Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #19 · #19 in Coding Margin 95.45454545454545 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #12 · #12 in Coding › Agentic Margin 59.09090909090909 Terminal-Bench Harbor Hub · Oct 6, 2026 | #19 · #19 in Coding › Agentic Margin 95.45454545454545 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 | #38 · #38 in Coding › Web dev Margin 34.57943925233644 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #10 · Was SOTA · Long context Margin 6.802721088435391 LMArena leaderboard dataset · Oct 13, 2026 | #31 · #31 in Long context Margin 21.088435374149654 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 | #21 · #21 in Factuality Margin 16.417910447761187 LMArena leaderboard dataset · Oct 13, 2026 | #47 · #47 in Factuality Margin 35.82089552238806 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.
Claude Sonnet 5: $4.000000000000001 per 1M blended tokens.
Claude Opus 4.8: closed weights.
Claude Sonnet 5: closed weights.
General LLM: As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in General LLM at #20 against #39.
Reasoning: As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Reasoning at #10 against #34.
Science: As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Science at #27 against #32.
Coding: As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Coding at #12 against #19.
Coding › Agentic: As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Coding › Agentic at #12 against #19.
Coding › Web dev: As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Coding › Web dev at #33 against #38.
Long context: As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Long context at #10 against #31.
Factuality: As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Factuality at #21 against #47.
Claude Opus 4.8 · Claude Sonnet 5
Claude Opus 4.8 or Claude Sonnet 5?
As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in 8 of 8 shared categories: General LLM, Reasoning, Science, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Opus 4.8 or Claude Sonnet 5 for General LLM?
As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in General LLM at #20 against #39.
Claude Opus 4.8 or Claude Sonnet 5 for Reasoning?
As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Reasoning at #10 against #34.
Claude Opus 4.8 or Claude Sonnet 5 for Science?
As of Oct 14, 2026, Claude Opus 4.8 leads Claude Sonnet 5 in Science at #27 against #32.