---
title: "GPT-6-Astra — LLM-TEST.com"
url: /models/gpt-6-astra/
canonical_url: https://llm-test.com/models/gpt-6-astra/
language: en
type: model
summary: "OpenAI's top-end frontier model and the flagship of the GPT-6 generation, aimed at the most demanding reasoning, coding and multimodal work. The premium choice when capability outweighs price."
last_updated: "2026-11-05"
---

# GPT-6-Astra

_OpenAI · Flagship_

OpenAI's top-end frontier model and the flagship of the GPT-6 generation, aimed at the most demanding reasoning, coding and multimodal work. The premium choice when capability outweighs price.

## At a glance

- Released: Oct 1, 2026
- Provider: OpenAI
- Context window: 1,000,000 tokens
- Max output: 128,000 tokens
- Modalities: Text + image → text
- Knowledge cutoff: June 2026
- API model ID: `gpt-6-astra`
- License: Proprietary (API only)

## Pricing

- Standard: $10 input / $50 output per 1M tokens
- Batch: $5 input / $25 output per 1M tokens
- Example: a 1,500-token prompt + 650-token answer ≈ $0.048 (standard)

## What's new vs GPT-5.5 (February 2026)

- Markedly stronger reasoning and coding
- Better multimodal understanding
- Larger context with steadier long-range recall
- Premium pricing at the top of the range
- Higher latency than smaller GPT-6 models

## Best use cases

- **Frontier reasoning** — Solves hard analytical and technical problems end to end.
- **Complex coding** — Builds and debugs across large projects with strong planning.
- **Multimodal analysis** — Reads images alongside text for richer understanding.

## Strengths

- Frontier-level capability
- Strong multimodal
- Large context
- Excellent coding

## Limitations

- Expensive
- Higher latency

## Where to get access

- Consumer app: ChatGPT (web, desktop, mobile) — https://chatgpt.com
- API: the OpenAI Platform — https://platform.openai.com
- Also available: Microsoft Azure OpenAI Service
- Docs: https://platform.openai.com/docs

Full comparison and live pricing: https://llm-test.com/ · directory: https://llm-test.com/models/