Claude Sonnet 5.5 vs GPT-6 Astra
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6 Astra in 5 of 10 shared categories: Reasoning, Coding, Coding › Agentic, Long context, and Factuality.
Claude Sonnet 5.5
Yes. SOTA in Coding (tied), Coding › Agentic (tied), and Vision (tied).
GPT-6 Astra
Yes. SOTA in Math and Vision (tied).
| Category | Claude Sonnet 5.5 | GPT-6 Astra |
|---|---|---|
| General LLM | #29 · #29 in General LLM Margin 15.425531914893611 LMArena leaderboard dataset · Oct 13, 2026 | #26 · #26 in General LLM Margin 13.829787234042556 LMArena leaderboard dataset · Oct 13, 2026 |
| Reasoning | #18 · #18 in Reasoning Margin 10.106382978723403 LMArena leaderboard dataset · Oct 13, 2026 | #24 · #24 in Reasoning Margin 13.297872340425528 LMArena leaderboard dataset · Oct 13, 2026 |
| Math | #4 · #4 in Math Margin 6.666666666666671 Epoch AI benchmarking hub · Sep 28, 2026 | #1 · SOTA · Math Margin 0 Epoch AI benchmarking hub · Sep 3, 2026 |
| Science | #3 · #3 in Science Margin — Epoch AI benchmarking hub · Sep 28, 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 | #3 · Near-SOTA · Coding › Web dev Margin 1.5999999999999943 LMArena leaderboard dataset · Oct 13, 2026 | #2 · Near-SOTA · Coding › Web dev Margin 0.7999999999999972 LMArena leaderboard dataset · Oct 13, 2026 |
| Long context | #11 · #11 in Long context Margin 5.851063829787236 LMArena leaderboard dataset · Oct 13, 2026 | #25 · #25 in Long context Margin 13.297872340425528 LMArena leaderboard dataset · Oct 13, 2026 |
| Vision | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 28, 2026 | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 3, 2026 |
| Factuality | #17 · #17 in Factuality Margin 10.465116279069761 LMArena leaderboard dataset · Oct 13, 2026 | #29 · #29 in Factuality Margin 17.441860465116278 LMArena leaderboard dataset · Oct 13, 2026 |
| Abstraction (ARC) | — | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 3, 2026 |
Claude Sonnet 5.5: $4.000000000000001 per 1M blended tokens.
GPT-6 Astra: $20 per 1M blended tokens.
Claude Sonnet 5.5: closed weights.
GPT-6 Astra: closed weights.
General LLM: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 5.5 in General LLM at #26 against #29.
Reasoning: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6 Astra in Reasoning at #18 against #24.
Math: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 5.5 in Math at #1 against #4.
Science: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 5.5 in Science at #2 against #3.
Coding: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6 Astra in Coding at #1 against #2.
Coding › Agentic: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6 Astra in Coding › Agentic at #1 against #2.
Coding › Web dev: As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 5.5 in Coding › Web dev at #2 against #3.
Long context: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6 Astra in Long context at #11 against #25.
Vision: As of Oct 15, 2026, Claude Sonnet 5.5 and GPT-6 Astra share #1 in Vision.
Factuality: As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6 Astra in Factuality at #17 against #29.
Claude Sonnet 5.5 · GPT-6 Astra
Claude Sonnet 5.5 or GPT-6 Astra?
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6 Astra in 5 of 10 shared categories: Reasoning, Coding, Coding › Agentic, Long context, and Factuality.
Claude Sonnet 5.5 or GPT-6 Astra for General LLM?
As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 5.5 in General LLM at #26 against #29.
Claude Sonnet 5.5 or GPT-6 Astra for Reasoning?
As of Oct 15, 2026, Claude Sonnet 5.5 leads GPT-6 Astra in Reasoning at #18 against #24.
Claude Sonnet 5.5 or GPT-6 Astra for Math?
As of Oct 15, 2026, GPT-6 Astra leads Claude Sonnet 5.5 in Math at #1 against #4.