Gemini 4 Carbon vs GPT-6 Astra
As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in 5 of 6 shared categories: General LLM, Reasoning, Long context, Factuality, and Legal.
Gemini 4 Carbon
Too new. Too new to call. The crown still needs confirming evidence.
GPT-6 Astra
Yes. SOTA in Math and Vision (tied).
| Category | Gemini 4 Carbon | GPT-6 Astra |
|---|---|---|
| General LLM | #1 · Leading · crown pending Margin 0 Vals AI · Nov 3, 2026 | #27 · #27 in General LLM Margin 17.500315776177843 Vals AI · Nov 3, 2026 |
| Reasoning | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 | #29 · #29 in Reasoning Margin 17.85714285714286 LMArena leaderboard dataset · Oct 28, 2026 |
| Math | — | #1 · SOTA · Math Margin 0 Epoch AI benchmarking hub · Sep 3, 2026 |
| Science | — | #1 · #1 in Science Margin — Vals AI · Oct 30, 2026 |
| Coding | #— · Not enough data Margin — LMArena leaderboard dataset · Oct 28, 2026 | #2 · Near-SOTA · Coding Margin 11.181257014590358 Terminal-Bench Harbor Hub · Nov 3, 2026 |
| Coding › Agentic | — | #2 · Near-SOTA · Coding › Agentic Margin 13.63636363636364 Terminal-Bench Harbor Hub · Oct 23, 2026 |
| Coding › Web dev | #4 · Pending · Coding › Web dev Margin 2.34375 LMArena leaderboard dataset · Oct 28, 2026 | #2 · Near-SOTA · Coding › Web dev Margin 0.78125 LMArena leaderboard dataset · Oct 28, 2026 |
| Long context | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 | #24 · #24 in Long context Margin 14.88095238095238 LMArena leaderboard dataset · Oct 28, 2026 |
| Vision | — | #1 · Co-SOTA · Vision Margin 0 Epoch AI benchmarking hub · Sep 3, 2026 |
| Factuality | #1 · Leading · crown pending Margin 0 LMArena leaderboard dataset · Oct 28, 2026 | #32 · #32 in Factuality Margin 19.631901840490798 LMArena leaderboard dataset · Oct 28, 2026 |
| Abstraction (ARC) | — | #1 · #1 in Abstraction (ARC) Margin — Epoch AI benchmarking hub · Sep 3, 2026 |
| Cybersecurity | — | #1 · Near-SOTA · Cybersecurity Margin 0 Vals AI · Oct 27, 2026 |
| Legal | #1 · Pending · Legal Margin — Vals AI · Nov 3, 2026 | #18 · #18 in Legal Margin — Vals AI · Nov 3, 2026 |
Pricing
Gemini 4 Carbon: price per 1M tokens is unset in the catalog.
GPT-6 Astra: $20 per 1M blended tokens.
Gemini 4 Carbon: closed weights.
GPT-6 Astra: closed weights.
Benchmarks side by side
| Benchmark | Gemini 4 Carbon | GPT-6 Astra |
|---|---|---|
| Excel Modeling Benchmark (EMB) | 76.5 | 72.7 |
| Finance Agent | 67.2 | 60.4 |
| Legal Research Bench | 55.8 | 39.4 |
| LMArena Text (style-controlled, coding) | 1573 | 1542 |
| LMArena Text (style-controlled, hard prompts) | 1548 | 1500 |
| LMArena Text (style-controlled, longer query) | 1542 | 1488 |
| LMArena Text (style-controlled, overall) | 1528 | 1476 |
| LMArena Text factuality | 1522 | 1467 |
| LMArena WebDev | 1768 | 1773 |
| Tax Agent Bench | 51.8 | 20.7 |
| Vals Index | 70.5 | 65.0 |
| Vibe Code Bench | 89.1 | 89.6 |
Latest validated result for each model. Benchmarks where only one model has a result are left out.
Verdict
As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in 5 of 6 shared categories: General LLM, Reasoning, Long context, Factuality, and Legal.
General LLM: As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in General LLM at #1 against #27.
Reasoning: As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in Reasoning at #1 against #29.
Coding › Web dev: As of Nov 3, 2026, GPT-6 Astra leads Gemini 4 Carbon in Coding › Web dev at #2 against #4.
Long context: As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in Long context at #1 against #24.
Factuality: As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in Factuality at #1 against #32.
Legal: As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in Legal at #1 against #18.
Gemini 4 Carbon or GPT-6 Astra?
As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in 5 of 6 shared categories: General LLM, Reasoning, Long context, Factuality, and Legal.
Gemini 4 Carbon or GPT-6 Astra for General LLM?
As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in General LLM at #1 against #27.
Gemini 4 Carbon or GPT-6 Astra for Reasoning?
As of Nov 3, 2026, Gemini 4 Carbon leads GPT-6 Astra in Reasoning at #1 against #29.
Gemini 4 Carbon or GPT-6 Astra for Coding › Web dev?
As of Nov 3, 2026, GPT-6 Astra leads Gemini 4 Carbon in Coding › Web dev at #2 against #4.