---
title: "AI Model Radar: Confirmed Releases and Rumor Status"
description: "A sourced September 6, 2026 snapshot of Astra, Fable 5.1, Gemini 3.8 Flash and Grok 4.6, with restricted and unconfirmed status clearly labeled."
author: Power of AI
date: 2026-09-06
url: https://powerofai.ca/model-radar
---

# AI Model Radar: Confirmed Releases and Rumor Status

A sourced September 6, 2026 snapshot of Astra, Fable 5.1, Gemini 3.8 Flash and Grok 4.6, with restricted and unconfirmed status clearly labeled.

A dated editorial snapshot checked September 6, 2026. This page does not update automatically. Confirmed means a documented announcement, not access for every account. Restricted access and unconfirmed future releases remain separate.

## GPT-6 Astra

Status: Confirmed. Verified September 6.

Listed in OpenAI’s model reference for complex work. Tool access depends on the environment.

[OpenAI: GPT-6 Astra model reference](https://developers.openai.com/api/docs/models/gpt-6-astra)

## Claude Fable 5.1

Status: Confirmed. September 2026 announcement.

Officially introduced by Anthropic. Check current access for your account.

[Anthropic: introducing Fable 5.1 and Mythos 5.1](https://www.anthropic.com/claude-fable-and-mythos-5-1)

## Claude Mythos 5.1

Status: Restricted. September 2026 announcement.

Trusted-access arrangements and different safeguards; not ordinary unrestricted consumer availability.

[Anthropic: introducing Fable 5.1 and Mythos 5.1](https://www.anthropic.com/claude-fable-and-mythos-5-1)

## Gemini 3.8 Flash

Status: Confirmed. September 2, 2026.

Official announcement covers developer access and Google AI Pro and Ultra app access.

[Google: Gemini 3.8 Flash and Flash Cyber, September 2](https://blog.google/innovation-and-ai/models-and-research/gemini-models/3-8-flash-and-3-8-flash-cyber/)

## Gemini 3.8 Flash Cyber

Status: Restricted. September 2, 2026.

Prioritized access through the Fairwind Program. Separate from ordinary Flash access.

[Google: Gemini 3.8 Flash and Flash Cyber, September 2](https://blog.google/innovation-and-ai/models-and-research/gemini-models/3-8-flash-and-3-8-flash-cyber/)

## Grok 4.6

Status: Confirmed. August 12, 2026 API release.

API availability is documented. Consumer app availability must be checked separately.

[xAI: developer release notes](https://docs.x.ai/developers/release-notes)

## Additional future flagship models

Status: Unconfirmed. Checked through September 6.

This edition has no verified primary announcement establishing additional future names or launch dates. No speculative calendar is presented.

[Read the Astra and Fable 5.1 briefing](/journal/astra-fable-51-september-2026) | [Create a comparison mission](/mission-control).