Software Update No. 02 · Week of Oct. 5, 2026 · All 4 issues
Software Update · Thursday

ChatGPT moved to GPT-6.

ChatGPT's Chat tab moved to GPT-6, and answers can now arrive as diagrams and working tools. Check what those tools assume. Also: monthly API credits for Claude Max and Team, a cheaper Haiku, and audio uploads in ChatGPT.

As of Oct. 8, 2026 · About a 4-minute read

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This week's updates

ChatGPT answers can now come as tools.

On Oct. 7, OpenAI moved ChatGPT's Chat tab to GPT-6, whose answers can include diagrams, comparisons and calculators you use in the chat. The same day Anthropic shipped a cheaper small model, Haiku 5.5, and gave Max and Team plans monthly credits for its developer platform. GPT-5.5 leaves Codex on Oct. 14, as covered last week, and Anthropic's updated Usage Policy applies from Nov. 12.

OpenAI GPT-6 · Anthropic Haiku 5.5 · Gizmochina · Anthropic usage policy
The dates in this issueSet by OpenAI and Anthropic · spacing not to scale
  1. Oct. 6Audio uploads arrive in ChatGPT
  2. Oct. 7GPT-6 reaches paid ChatGPT plans
  3. Oct. 8GPT-6 starts reaching Free and Go
  4. Oct. 14GPT-5.5 leaves Codex
  5. Nov. 12Anthropic's updated Usage Policy applies

Before Oct. 14: swap GPT-5.5 out of saved Codex settings, custom agents and scripts.

OpenAI release notes · Gizmochina · Anthropic usage policy
What changed · Oct. 1 – 8

Six changes this week

  1. ChatGPTOct. 7Plus, Pro, Business and Enterprise; Free and Go from Oct. 8
    Try it

    GPT-6 now answers in the Chat tab, with interactive layouts

    Plus, Pro, Business and Enterprise get GPT-6 Sol; Free and Go get GPT-6 Luna. Answers can mix text with diagrams, side-by-side comparisons and working tools such as calculators, and can start before ChatGPT has finished thinking. Enterprise access depends on admin settings. The Pro reasoning option stays on GPT-6 Astra without the new layouts, and Work and Codex models don't change.

    OpenAI GPT-6 · OpenAI release notes
    A calculator inside an answer

    GPT-6 can answer with a working calculator.

    OpenAI release notes
  2. ClaudeOct. 7Max and Team; rolling out over a few days
    Turn it on

    Max and Team plans now include monthly API credits

    Max 5x gets $100 a month, Max 20x gets $200, and Team gets up to $500 pooled across its users, for running your own apps and agents on the Claude Platform. Anthropic says they work on any of its models. To claim them, link a Claude Console organization in Settings > Billing (Max) or Organization settings > Billing (Team). On a work plan, claim and spend them only if your company allows it.

    Claude release notes · Anthropic Haiku 5.5
    Claude's new monthly API creditsDollars a month, by plan

    Monthly credit

    Max 5x100
    Max 20x200
    Team (pooled, up to)500

    For your own apps and agents on the Claude Platform. Claim them in billing settings.

    Anthropic Haiku 5.5 · Claude release notes
  3. ClaudeOct. 7Claude Platform, AWS, Google Cloud and Microsoft Azure
    Try it

    Haiku 5.5, a cheaper small model for the API

    For prompts up to 100,000 tokens, Anthropic lists $0.10 per million input tokens and $0.50 per million output tokens, against $1.00 and $5.00 for Haiku 4.5, and says it costs around 75% less to run on average. It's the first Haiku with an adjustable effort setting. Anthropic says Sonnet 5.5 and Opus 5.5 remain better for complex agentic coding. Test it on your high-volume jobs before you switch.

    Anthropic Haiku 5.5
  4. ChatGPTOct. 6Paid plans and workspaces
    Try it

    Upload audio for transcripts, summaries and questions

    Attach an audio file to a chat and ask for a transcript, a summary or a follow-up email draft. OpenAI says availability varies by workspace settings, region, app version and model, and that transcripts may contain errors and vary by language. Check names, numbers and decisions against the recording before you send anything on. If the recording includes other people, ask them first, and at work do it only if your company allows it.

    OpenAI release notes
  5. Microsoft 365 CopilotOct. 6 notesMicrosoft 365 Copilot Chat on the web
    Try it

    Copilot Chat can redo an answer, or hand it to another model

    At the end of a response, open More options and choose Try Again for a fresh answer, or Switch Model to get one from a different AI model, without retyping the prompt. The same release notes add chat inside Copilot Search on Windows and the web, and custom skills in Copilot in PowerPoint for Windows. Admins can now edit Copilot connector rules themselves, under Settings > Search & intelligence > Data sources. Microsoft rolls features out to some people in a company first.

    Microsoft 365 Copilot release notes
  6. ClaudeFrom Nov. 12Everyone who uses Anthropic's products
    Heads-up

    Anthropic's updated Usage Policy takes effect Nov. 12

    Anthropic says most of the changes clarify existing rules. Where Claude's output can affect someone's health, legal rights, finances, livelihood or access to essential services, it still requires a qualified human in the loop, and the person affected must be told AI was used. The update also spells out rules against networks of fake accounts and fabricated news sites. If your team uses Claude where those stakes apply, read that section before Nov. 12.

    Anthropic usage policy
Before next Thursday
  1. Swap out GPT-5.5 by Oct. 14. Check saved model settings, custom agents, scheduled tasks and scripts in Codex.
  2. Test one GPT-6 tool answer. Ask for a calculator or comparison you can check by hand, and look at the numbers it put in.
  3. Claim your Claude credits if you're on Max, or a Team owner: Settings > Billing or Organization settings > Billing.
  4. Note Nov. 12. If Claude's output affects people's health, legal rights, finances or livelihood, read the high-risk section of Anthropic's updated Usage Policy.

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Checked by me.

Postmark: Sent from my Agent, checked by me, Oct. 8, 2026
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