Claude Opus 5.5 vs GPT-6 Astra
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in 7 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5
Yes. SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.
GPT-6 Astra
Yes. SOTA in Math and co-SOTA in Vision.
| Category | Claude Opus 5.5 | GPT-6 Astra |
|---|---|---|
| General LLM | #2 · Near-SOTA · General LLM Margin 1.3605442176870781 LMArena leaderboard dataset · Oct 13, 2026 | #25 · #25 in General LLM Margin 17.006802721088434 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #1 · Co-SOTA · Reasoning Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #23 · #23 in Reasoning Margin 16.438356164383563 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 13, 2026 | #1 · SOTA · Math Margin 0 Epoch AI benchmarking hub · Sep 3, 2026 |
| Science | #31 · #31 in Science Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #2 · #2 in Science Margin — Epoch AI benchmarking hub · Sep 3, 2026 |
| Coding | #1 · Co-SOTA · Coding Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #2 · Near-SOTA · Coding Margin 13.63636363636364 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Agentic | #1 · Co-SOTA · Coding › Agentic Margin 0 Terminal-Bench Harbor Hub · Oct 6, 2026 | #2 · Near-SOTA · Coding › Agentic Margin 13.63636363636364 Terminal-Bench Harbor Hub · Oct 6, 2026 |
| Coding › Web dev | #1 · SOTA · Coding › Web dev Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · Coding › Web dev Margin 0.9345794392523317 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #1 · Co-SOTA · Long context Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #22 · #22 in Long context Margin 14.965986394557817 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #4 · Near-SOTA · Vision Margin 13.15789473684211 Epoch AI benchmarking hub · Sep 22, 2026 | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 3, 2026 |
| Factuality | #1 · Co-SOTA · Factuality Margin 0 LMArena leaderboard dataset · Oct 13, 2026 | #25 · #25 in Factuality Margin 19.402985074626883 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 22, 2026 | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 3, 2026 |
Claude Opus 5.5: $8.000000000000002 per 1M blended tokens.
GPT-6 Astra: $20 per 1M blended tokens.
Claude Opus 5.5: closed weights.
GPT-6 Astra: closed weights.
General LLM: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in General LLM at #2 against #25.
Reasoning: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in Reasoning at #1 against #23.
Science: As of Oct 15, 2026, GPT-6 Astra leads Claude Opus 5.5 in Science at #2 against #31.
Coding: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in Coding at #1 against #2.
Coding › Agentic: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in Coding › Agentic at #1 against #2.
Coding › Web dev: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in Coding › Web dev at #1 against #2.
Long context: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in Long context at #1 against #22.
Vision: As of Oct 15, 2026, GPT-6 Astra leads Claude Opus 5.5 in Vision at #1 against #4.
Factuality: As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in Factuality at #1 against #25.
Abstraction (ARC): As of Oct 15, 2026, Claude Opus 5.5 and GPT-6 Astra share #1 in Abstraction (ARC).
Claude Opus 5.5 or GPT-6 Astra?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in 7 of 10 shared categories: General LLM, Reasoning, Coding, Coding › Agentic, Coding › Web dev, Long context, and Factuality.
Claude Opus 5.5 or GPT-6 Astra for General LLM?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in General LLM at #2 against #25.
Claude Opus 5.5 or GPT-6 Astra for Reasoning?
As of Oct 15, 2026, Claude Opus 5.5 leads GPT-6 Astra in Reasoning at #1 against #23.
Claude Opus 5.5 or GPT-6 Astra for Science?
As of Oct 15, 2026, GPT-6 Astra leads Claude Opus 5.5 in Science at #2 against #31.