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GPT-6 Astra

by OpenAI · Text & Chat · Image · Audio & Voice · Code

OpenAI's "AGI-era" flagship · AA Intelligence Index 57 · FrontierMath Tier 4 97.6% · Terminal-Bench 4.0 57.9% · 1M context.

98/100AIVerso score
#4 of 54in Text & Chat
From $20/mo (Plus)Starting price
NoFree tier
Try GPT-6 Astra →Compare with alternatives →

What is GPT-6 Astra?

GPT-6 Astra is OpenAI’s flagship model, released in September 2026 and available in ChatGPT and the API. It is especially strong at hard maths and agentic, tool-using tasks and offers a 1M-token context.

Best for

GPT-6 Astra pricing

GPT-6 Astra has no free tier. Price: From $20/mo (Plus); API access costs $10/$50 per 1M.

Plans & prices

Looking for something cheaper? Claude Fable 5.2 by Anthropic costs $8/$40 per 1M tokens.

Prices as published by OpenAI. This page was last updated on November 13, 2026; prices and plans change often, so check the provider’s pricing page before you buy.

Check current GPT-6 Astra prices →

At a glance

ProviderOpenAI
CategoryText & Chat, Image, Audio & Voice, Code
Starting priceFrom $20/mo (Plus)
Free tierNo
API accessYes
Open sourceNo
Context window1M tokens
Mobile appiOS & Android
Browser extensionYes

Key facts

GPT-6 Astra benchmarks

LeaderboardResult
Artificial Analysis Intelligence Index v557 points

The Artificial Analysis Intelligence Index combines several independent evaluations of reasoning, knowledge, maths and coding — see our full AA Index v5 ranking.

Capability ratings

Math & Logice.g. AIME, MATH-500
97
Programminge.g. SWE-bench, LiveCodeBench
92
Reasoninge.g. GPQA, ARC
96
Knowledgee.g. MMLU-Pro
94
Long Contexte.g. MRCR, needle tests
96
Instruction Followinge.g. IFEval
95
Agent Capabilitye.g. Terminal-Bench, tool use
95

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

Features

✓ Image generation
✗ Video generation
✓ Native audio model
✓ Web search
✓ Voice mode (app)
✓ PDF analysis

Strengths

Top-tier AIVerso score (98/100)
Versatile — covers Text & Chat, Image, Audio & Voice, Code
Large 1M token context window
Built-in web search
API access for developers
iOS & Android apps

Limitations

No free tier
Closed model — cannot be self-hosted

Best alternatives to GPT-6 Astra

Claude Fable 5.2
Anthropic · $8/$40 per 1M tokens — Higher score (99 vs 98)
Claude Fable 5.2 vs GPT-6 Astra →
99
Gemini 4 Carbon
Google · $2/$10 per 1M tokens (API, until Nov 30) — Lower API price ($2/$10 per 1M tokens (API, until Nov 30) vs $10/$50 per 1M)
98
Fugu Ultra v2
Sakana AI · $5/$30 per 1M tokens — Lower API price ($5/$30 per 1M tokens vs $10/$50 per 1M)
97
Kimi K3.1 Pro
Moonshot AI · Free – API · free tier — Has a free tier
95
Muse Wonder 1.0
Meta · $4/$20 per 1M tokens (API) — Lower API price ($4/$20 per 1M tokens (API) vs $10/$50 per 1M)
93

🔗 Comparisons & guides

Best ChatGPT alternativesAlternatives guide
Claude Opus 5.5 vs GPT-6 AstraHead-to-head comparison
Claude Fable 5.2 vs GPT-6 AstraHead-to-head comparison
GPT-6 Astra vs Gemini 4 ArgonHead-to-head comparison
GPT-6 Astra vs Grok 4.7Head-to-head comparison
Best AI Chatbot 2026: Top 7 AI Assistants RankedBest-of guide
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❓ Frequently Asked Questions

What is GPT-6 Astra?

GPT-6 Astra is OpenAI’s flagship model, released in September 2026 and available in ChatGPT and the API. It is especially strong at hard maths and agentic, tool-using tasks and offers a 1M-token context.

What is GPT-6 Astra best for?

GPT-6 Astra is a strong pick for: The hardest reasoning and maths problems; Agentic tasks that use tools or a computer; ChatGPT Plus and Pro subscribers.

How does GPT-6 Astra perform in benchmarks?

GPT-6 Astra scores 57 on the Artificial Analysis Intelligence Index v5.

How much does GPT-6 Astra cost?

GPT-6 Astra starts at From $20/mo (Plus) ($10/$50 per 1M). There is no free tier. A cheaper option from another provider is Claude Fable 5.2 ($8/$40 per 1M tokens).

Is GPT-6 Astra free?

No, GPT-6 Astra has no free tier. Pricing: From $20/mo (Plus) (details: $10/$50 per 1M).

What are the best alternatives to GPT-6 Astra?

The highest-rated AI chatbots & text models from other providers on AIVerso are Claude Fable 5.2 (99/100), Gemini 4 Carbon (98/100), Fugu Ultra v2 (97/100).

Does GPT-6 Astra have an API?

Yes, GPT-6 Astra can be used via an API.

Is GPT-6 Astra open source?

No, GPT-6 Astra is a closed, proprietary model from OpenAI.

How does AIVerso rate GPT-6 Astra?

GPT-6 Astra scores 98/100 on AIVerso and ranks #4 of 54 in Text & Chat. Scores combine public benchmark results, features and pricing; commissions never influence them.

How we rate: Scores and capability ratings are based on public benchmarks, provider documentation, features and pricing — not on commission rates. Prices can change; check the provider's site before buying. Last updated: November 13, 2026.