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2026 · 09 · 13 · Sun

Updates for 9/13

Perplexity and HeyGen both swapped what's under the hood today. Search gets sharper answers, and the avatar finally sounds natural in conversation.

Today's moves

2

Model, pricing and availability changes we actually wrote into the map and the encyclopedia.

A · Theme of the day

The answer engine's backbone shifts to GPT-6 Astra

Search AI's underlying model keeps changing week to week.

Perplexity's answer engine moves to GPT-6 Astra

PerplexityPerplexity
Compared to before

Until last month, Perplexity toggled between GPT-5.6, Claude Opus 5, and other models depending on the task.

What changed

Perplexity switches its core answer-generation model to GPT-6 Astra, while GPT-5.6, Claude Opus 5, and others stay selectable.

Why it matters

Matters if you care about answer quality; if you just ask occasional questions, the difference is basically noise.

B · Theme of the day

Avatars start holding real conversations

Video avatars are finally handling live voice dialogue too.

LiveAvatar starts talking back

HeyGenHeyGen
Compared to before

Until last month, LiveAvatar leaned toward scripted narration, and conversational timing still felt stiff.

What changed

HeyGen's LiveAvatar integrates OpenAI's GPT-Live-1 full-duplex speech model, with an open-source reference implementation.

Why it matters

A win for live-streaming or sales-demo use cases; teams doing scripted promo videos won't notice much.

Today's Tips

1

Practical ways to use these tools, picked up from social media and community threads.

T1 · Theme of the day

One setting change reshapes how you learn

No new command needed, just flip one setting.

Flip one setting into Learning mode

Claude CodeClaude Code
How to do it

In Claude Code, run /config, open output style, and switch from Default to Learning.

Why it helps

Good for engineers who want the reasoning explained while still writing small pieces of code themselves.

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