GPT-6 Astra (US)

GPT-6 Astra is presented as the newest entry in OpenAI's GPT lineage, rolled out across ChatGPT, Codex, and the OpenAI API according to third-party coverage of its early-September 2026 launch. The model is positioned around stronger autonomous computer use and more sustained multi-step reasoning than its predecessors, making it suitable for agent-style coding, tool orchestration, and longer analytical workflows that benefit from extended thinking time rather than single-turn answers.

Technically, GPT-6 Astra is described as using looped transformer architectures with dynamic thinking budgets, a design choice that lets the model allocate additional internal computation on harder prompts. On the ARC-AGI-3 abstraction and reasoning benchmark it is reported to score 99.9%, compared with 7.8% reported for GPT-5.6 Sol, indicating a large jump in general reasoning performance and reinforcing its fit for complex planning, coding, and research-oriented tasks where step-by-step deliberation matters more than raw response speed.

Amazon Bedrockus.openai.gpt-6-astragpt-astra

Open provider page Provider docs

Quick Info

Provider: Amazon Bedrock
Model key: us.openai.gpt-6-astra
Release date: Sep 4, 2026
Last updated: Sep 4, 2026
Knowledge cutoff: 2026-04-30
Input modalities
Output modalities
Capabilities

Cost

Input token cost: $11.00
Output token cost: $55.00

Limits

Input tokens: 922,000 tokens
Output tokens: 128,000 tokens
Context window: 1,050,000 tokens

OpenCode

Model variants

Ultrafast

Input

$66.00

per 1M tokens

Output

$330.00

per 1M tokens

Cache Read

$6.60

per 1M tokens

Cache Write

$82.50

per 1M tokens

Transparent token rates

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Rates are shown per one million tokens. Combined means one million input plus one million output tokens.

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Latest news about GPT-6 Astra (US)

Amazon Bedrock

Coverage

Rupert Chesman's analysis post, updated on September 3, 2026, reports that GPT-6 Astra shipped at US$10 per million input tokens and US$50 per million output tokens—pricing it on par with Claude Fable 5.1. It specifies a 1.05M-token context window and a knowledge cutoff of 30 April 2026, and notes the model is rolling The post also flags two launch caveats relevant to builders: the cyber capabilities that pushed GPT-6 Astra over OpenAI's "Critical" threshold are gated behind the Daybreak trusted-access programme, and OpenAI's misalignment monitors may slow, pause, or stop legitimate long-running tasks at launch—an important design c

Amazon Bedrock

Coverage

According to Communeify's AI Daily for September 10, 2026, OpenAI officially launched GPT-6 Astra across ChatGPT Work, Codex, and its API, framing it as a frontier agentic and reasoning foundation model. The post describes GPT-6 Astra as employing a looped transformer architecture with dynamic thinking budgets and repo The same article lists GPT-6 Astra at $10 per million input tokens and $50 per million output tokens via the API and notes that an initial 24-hour evaluation preview was hosted on LMSYS Arena Direct Mode. While the excerpt does not specifically mention Amazon Bedrock, the launch coverage establishes core model-level de

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