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GPT-6 Astra vs Gemini 3.1 Pro

How does GPT-6 Astra (OpenAI) compare against Gemini 3.1 Pro (Google)? Side-by-side scores, capability ratings and pricing, plus a clear verdict.

🏆 Quick verdict

GPT-6 Astra comes out ahead with an AIVerso score of 98 vs 96 and an aggregate capability rating of 665 vs 625 across 7 categories. Gemini 3.1 Pro is the budget pick with a free tier.

Overall winner
GPT-6 Astra
by OpenAI
Score: 98/100
PriceFrom $20/mo (Plus)
Pricing details$10/$50 per 1M
Context window1M
Free tierNo
API accessYes
Open sourceNo
Headline factsOpenAI's "AGI-era" flagship · FrontierMath Tier 4 97.6% · Terminal-Bench 4.0 57.9% · 1M context
Try GPT-6 Astra → Full GPT-6 Astra profile →
Gemini 3.1 Pro
by Google
Score: 96/100
PriceFree – $20/mo
Pricing detailsFree – $249/mo
Context window1M
Free tierYes
API accessYes
Open sourceNo
Headline factsLeads GPQA Diamond at 94.3% · 1M context · free via Google AI Studio
Try Gemini 3.1 Pro → Full Gemini 3.1 Pro profile →

📊 Capability ratings

AIVerso capability ratings (0–100) per category — an editorial summary informed by public benchmark results. Higher is better.

Category
GPT-6 Astra
Gemini 3.1 Pro
Math & Logice.g. AIME, MATH-500
97
92
Programminge.g. SWE-bench, LiveCodeBench
92
81
Reasoninge.g. GPQA, ARC
96
94
Knowledgee.g. MMLU-Pro
94
90
Long Contexte.g. MRCR, needle tests
96
96
Instruction Followinge.g. IFEval
95
93
Agent Capabilitye.g. Terminal-Bench, tool use
95
79

Why GPT-6 Astra

Higher overall score (98 vs 96)
Leads on Math & Logic (97 vs 92)
Leads on Programming (92 vs 81)
Leads on Reasoning (96 vs 94)
Leads on Knowledge (94 vs 90)
Leads on Instruction Following (95 vs 93)
Leads on Agent Capability (95 vs 79)

Why Gemini 3.1 Pro

Has a free tier
Leads GPQA Diamond at 94.3%
1M context

Open this comparison in the live tool →

❓ Frequently Asked Questions

Which is better: GPT-6 Astra or Gemini 3.1 Pro?

GPT-6 Astra has the higher AIVerso score (98 vs 96). The better choice still depends on your use case — Gemini 3.1 Pro remains a strong alternative.

How much does GPT-6 Astra cost compared to Gemini 3.1 Pro?

GPT-6 Astra: From $20/mo (Plus) ($10/$50 per 1M). Gemini 3.1 Pro: Free – $20/mo (Free – $249/mo). Only Gemini 3.1 Pro has a free tier.

What context window does each support?

GPT-6 Astra: 1M tokens. Gemini 3.1 Pro: 1M tokens. The context window determines how much text, code or chat history a model can process at once.

Are GPT-6 Astra and Gemini 3.1 Pro open source?

GPT-6 Astra is a closed, proprietary model. Gemini 3.1 Pro is a closed, proprietary model.

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How we compare: Scores and capability ratings are based on public benchmarks and provider documentation — not on commission rates. Last updated: September 29, 2026.