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ChatGPT and Claude in one app

ChatGPT and Claude in one app—without two browser profiles.

Write with Claude, structure with GPT, then pull Gemini or Grok when the task shifts. milkyway.chat keeps leading model families in one workspace with files, math modes, branching, and voice. Full workspace access requires a Pro or Lifetime plan.

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Pro from $14.99/month · Lifetime $149.99 one-time

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  • 1GPT + Claude + more
  • 2Shared workspace
  • 3One Pro plan
Workspace preview
Claude: draft the narrative. GPT: turn it into a decision matrix with risks.
Claude 5 Sonnet → GPT-5.4

Same project, two model strengths:

  1. 01Narrative draft retained
  2. 02Matrix of options and risks
  3. 03Branch for stakeholder-specific versions

Ask anything

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Why people open two apps

You already know which model you trust for which job.

The pain is not choosing Claude or GPT—it is paying twice and losing context when you hop windows.

  1. 01

    Double subscriptions

    Plus-style plans stack quickly when you need both ecosystems.

  2. 02

    Copy-paste context loss

    The second model never sees the full prior thread unless you re-paste.

  3. 03

    Missing third and fourth options

    Some tasks want Gemini multimodal or Grok speed, not only two logos.

One workspace

Keep the models you already use—add the tools they lack together.

Multi-model access plus modes that single-provider apps often skip.

GPT and Claude together

Supported OpenAI and Anthropic models in one interface.

Plus Gemini, Grok, more.

Branch comparisons

Fork a Claude draft and a GPT rewrite side by path.

Keep both.

Shared attachments

PDFs and notes stay with the project as you switch models.

No re-upload ritual.

Math modes

Strict Math and visualization when either model alone is not enough.

Study and STEM.

Live search

Current web context on supported models.

When facts move.

Ultra Mode

Multi-agent depth on Pro when a single pass is risky.

Hard decisions.

Two-pass pattern

Draft, challenge, ship.

A simple multi-model habit that works for writing and product work.

  1. 01

    Draft with Claude

    Get structure, tone, and long-context reading done first.

  2. 02

    Challenge with GPT

    Ask for risks, missing requirements, or a stricter outline.

  3. 03

    Optional third pass

    Bring Gemini for multimodal docs or Ultra Mode for multi-agent review.

Scenarios

Jobs that want both ecosystems.

Proposal writing

Claude drafts; GPT stress-tests claims and pricing logic.

Claude draft → GPT critique → Branch client version

Outcome

Polished narrative with explicit risk callouts.

Technical design

GPT structures options; Claude rewrites for clarity.

GPT matrix → Claude prose → Ultra Mode if high stakes

Outcome

Readable design with decision criteria.

Coursework week

Claude for essays; Strict Math for problem sets; GPT for outline checks.

Model switch → PDF attach → Math modes

Outcome

One app across subjects.

FAQ

ChatGPT + Claude questions

Is this official ChatGPT and Claude in one product from OpenAI and Anthropic?

No. milkyway.chat is an independent multi-provider workspace that offers supported models from multiple families under our plans.

Can I only use GPT and Claude?

Yes. You can stay on those families, or also use Gemini, Grok, and others when useful.

Does switching models keep chat history?

You work inside the same workspace and threads; use branching when you want parallel paths preserved explicitly.

How does pricing compare to two subscriptions?

Pro is $14.99/month for multi-model access. Compare that to paying separately for ChatGPT Plus and Claude Pro style plans in your region.

How much does milkyway.chat cost?

Pro is $14.99 per month and includes all premium models plus voice chat. Lifetime is $149.99 as a one-time payment and lets you bring your own API keys. Visit the pricing page for current plan details.

Can I try the workspace before subscribing?

Yes. You can explore the interactive math visualization example without a subscription. After signing in, you can browse the workspace interface, but sending messages requires an active Pro or Lifetime plan.

Ready to get started

Keep GPT and Claude in one capable workspace.

Pick Pro or Lifetime on the pricing page, then start with the model and tools your task needs.

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